What Is a Weld Neck Flange Desinged for?

A steel flange provides a method to prevent leakage and other damages and secure metal pipe. Option for the appropriate steel flange greatly depend on types of substance which flow through the piping system. A long weld neck flange is designed for residential, commercial and industrial piping systems.

Definition

    A steel pipe flange is used to strengthen, guide or attach one pipe to another. Standard steel flanges are disc shaped and are bolted or welded in place. Each steel flange is bored to receive and secure a specific size of pipe. Flange sizes, materials and opening dimensions vary depending upon what application the flange is designed for. Slip-on, socket-wired and threaded flanges are standard styles.

Details

    A long weld neck flange is considered as a specialty flange because of its protruding neck, also referred to as a hub. The neck extends from the flat surface of the flange and receives and guides the pipe into place — the neck serves as an extension of the boring. Tapering the neck provides extra reinforcement for use in high-pressure or extreme and fluctuating temperature applications. Tapering the flange reduces the steel's thickness so that the opening of the neck blends with the pipe it receives — the tapered neck appears to be an extension of the pipe.

Landee stainless steel ball valve with butt Weld ISO Mount

The stainless steel ball valve provides bubble-tight shutoff at 2000 psi. This valve is available with butt weld pipe connections and cast ISO mounting pad for actuation purposes. The reinforced PTFE 15% glass seat ring, Graphite stem packing and stainless steel ball/stem exhibit high chemical resistance properties and are recommended for process piping. The three-piece ball valve is recommended for petrochemical, utility service applications. It meets Fire Safe and Anti-Static requirements.
Valve pressure rating 2000 psi 138 bar non-shock cold working pressure
Max temperature rating 400°F
Conventional port
Enclosed bolt design
Reinforced PTFE seats
Stainless steel ball and stem
Blowout-proof stem
Cast ISO mounting pad
Vented ball
Locking lever handle
Butt weld end connections
Conforms to MSS SP-110
API-607 Fourth Edition Fire Safe
API-608 Anti-Static Size range ½" to 2" 

Keystone enjoys a strong reputation in the industrial valves

Keystone is the world's leaders recognized control valve in the valve and industrial process. The initial design, patent and the introduction of butterfly valve in 1951, focusing on the development of a strong reputation for reliability, quality and service. These properties are grown Pentair and maintain and brand as portfolio to include trapezoidal pneumatic and electric actuators and control packet, single point of contact for our valve package seamless compatibility and owner. Also with a trapezoidal name we design and manufacture a series of Flanged Gate Valves and ball valve. These products provide customers the same solid performance and low cost of ownership as our market leading valve range.

Making brand is a solid choice for valve company

"OEM narrower, must have the independent brand, but the transformation of the road is not easy." This is the recently held fifteenth session of Haijiao Hui channel brand culture forum, and said a foreign trade enterprises responsible person said to remember, human fight, fight cost "sweat economy" has failed, brand is the best choice.
Responsible for the foreign trade enterprise troubles caused by many foreign trade enterprises resonance, these enterprises generally face two difficulties: one is the appreciation of the renminbi, raw material prices, labor shortage caused by rising costs; two is from the surrounding low cost countries manufacturer's competition, these problems also plagued China AWWA C508 Water Check Valves company..
Shanghai Export Commodities Enterprise Association Feng Zhengzhou said: "the low price competition has not sustainable, foreign trade enterprises should walk out of predicament, to transfer from the sales price to the value of sales of product design, product function, brand culture, to completely reverse the heavy production, light brand marketing exchange ideas."
Overall, at present foreign trade enterprise transformation has three directions: first is the development of emerging markets in the Middle East, Latin America, Africa, Southeast Asia and so on; the second way is to create a foreign brand; three is to enter the domestic market, the three point is the future of China's Valve Factory go in the direction of.
"We try to create their own brands into the international market, but because the market marketing means and the lack of funding, foreign customers do not recognize us, so many enterprises always dare not to take a step. A company official said, "but even so, the enterprise must have its own brand, the direction of don't be afraid of the distance." Shanghai Ming Bao valve that it is worth China learning from the valve company, or that sentence future valve industry will be the enterprise brand competition.

The operation process of prior period opening pressure of safety valve

1.Flanged Safety Valves before delivery, should be by Taiwan to adjust its opening pressure to the user's setting. If users spring pressure level, according to the general should be adjusted by the lower limit of pressure level of the factory.
2. User before install the valve onto the protected equipment or before installing, adjustment must be installed on site, to ensure that the relief valve setting pressure value conforms to the requirements.
3. Within the scope of work indicated on the nameplate of the spring pressure level, by turning adjustment screw to change amount of spring compression, the opening pressure can be regulated. (4) before the rotation adjustment screw, valve inlet pressure should be brought down to the opening pressure is less than 90%, in order to prevent the rotation adjustment screw when the disc is driven to rotate, so that damage the sealing surface.
4. To guarantee the accuracy of the opening pressure value, should make adjustment when the medium conditions, such as type, temperature as close as possible to the actual operating conditions. Medium type change, especially when the accumulated state of the medium not (e.g., from a liquid into a gas phase) at the same time, the opening pressure is often change. Work at higher temperatures, the opening pressure is generally reduced. In room temperature adjustment and when used in high temperature, room temperature should be slightly higher than the setting pressure value of opening pressure value of the request. High to what extent and valves are relationship, structure and material selection should be according to manufacturer's instructions.
5. Regular safety valve used in fixed additional back-pressure occasions, when adjust the opening pressure after inspection (back pressure to atmospheric pressure) at this time, the setting value shall be the requirements of opening pressure value minus the superimposed back pressure value.

Dixon showcased actuated valves and hygienic fittings at Total Process and Packaging Exhibition

Fittings are available ex-stock in a variety of types (RJT, SMS, DIN, IDF and Triclamp) with sizes from 0.5–12in and are supplied either fully polished or complete with polished outside diameter and bright annealed or tumbled inside diameter. The range includes full FDA- and 3A-approved products and includes high-purity BPE standard biopharm weld fittings, tees, elbows and reducers for pharmaceutical applications.
Dixon will also highlight its range of hygienic FDA-approved hoses and hose assemblies. Thanks to their odourless and taste-free properties, the products are suitable for the transfer of liquid foodstuffs. A range of valves, including seat valves, mix-proof valves and diaphragm valves, will also be on show.
The company has recently launched a range of manual and actuated multi-way hygienic and industrial ball valves from 0.5–4in and hygienic butterfly valves with EPDM, silicone or Viton seals from 1–10in. The valves can be actuated to customer specification with a range of accessories including limit switches, solenoids and positioners. Dixon offers same-day and next-day delivery on most standard actuated valves and custom fabrications subject to customer requirements.
Dixon will be exhibiting on stand E59 at the Total event.

Special check valves in the passive core-flooding system

 Through an article titled “Resolve Koodankulam Issues” in TNIE (April 19, 2013), I had brought out certain serious safety issues emanating from the supply of substandard components and equipment imported and installed in the Russian VVER 1000 MWe Units 1 and 2 at the Koodankulam Nuclear Power Project (KKNP) under construction in Tamil Nadu, India. I had also pointed out that a major Russian government company, ZiO-Podolsk, might have supplied components and equipment of poor quality to KKNP, possibly impacting the reliability and safety of the two nuclear reactors there.
NPCIL, in an additional clarification released on April 20, admitted that “four valves in the passive core-flooding system, though initially tested in factory premises under simulated conditions, showed variations from expected performance during integrated testing at the KKNP site.” This underplays the gravity of the entire situation. These four are “special check valves”, and they are crucial to the long-term core-cooling under severe accident conditions, including a total loss of electric power. It is a fact that no adequate testing of these valves was done in Russia. How could this happen in spite of the highly-lauded, multi-tier quality control programme under which NPCIL claims that an inspection team of theirs, stationed in the Russian factory, has witnessed and signed off on this testing?

Plumbing valve companies attempt to expand the domestic market

Yuhuan plumbing valve industry in yuhuan county government's vigorously support, after years of development, now both product quality and sales has made great progress and have different pattern, believe in the near future yuhuan plumbing valve products will be a household name in China.
First contact yuhuan plumbing valve products of Beijing construction engineering material construction metal structure association branch deputy secretary-general HuoQingMin, in addition to carefully observe the showroom each product appearance, also inquired about the price. "Looked really good, I think in the future in addition to my personal will to purchase, I would actively recommend to the people around." HuoQingMin said.
According to understand, my county in addition to yuhuan plumbing sanitary ware famous brand exhibition hall was established in Beijing, is still in active preparation China valve city marketing center, and will be opened around end of September this year of linyi in shandong province. At the same time, our county in the future will also be other urban centres across the country gradually establish a plumbing valve unified marketing center.
ZhangYong, said the county government hope that through this a series of measures, prompted as a capital of China Forged Steel Valves, faucet production base in China yuhuan onto a new stage, and promote the transformation and upgrading of our county plumbing valve industry sustainable development, and health.

Globe valves different from ball valves are used for applications requiring throttling

A globe valve different from ball valve is a type of valve used for regulating flow in a pipeline, consisting of a movable disk-type element and a stationary ring seat in a generally spherical body.

Although globe valves in the past had the spherical bodies which gave them their name, many modern globe valves do not have much of a spherical shape. However, the term globe valve is still often used for valves that have such an internal mechanism. In plumbing, valves with such a mechanism are also often called stop valves since they don't have the global appearance, but the term stop valve may refer to valves which are used to stop flow even when they have other mechanisms or designs.

Globe valves are used for applications requiring throttling and frequent operation. For example, globe valves or valves with a similar mechanism may be used as sampling valves, which are normally shut except when liquid samples are being taken. Since the baffle restricts flow, they're not recommended where full, unobstructed flow is required.

Compounds of natural have been used for decades for gate valves and flange gaskets

There are numerous potential sources of contamination in potable water systems, not least of which is contact with the components comprising these systems. On its journey from the source to the tap, water typically passes through miles of pipe and various mechanical devices such as pumps, meters, and valves, all of which require seals.
Because of their resilient properties, elastomers account for a large portion of these materials. Compounds of natural , styrene butadiene , and acrylonitrile butadiene rubbers and Chloroprene (Neoprene) have been used for decades for pipe seals, gate valves, flange gaskets and O-rings.
Ethylene propylene diene rubber , with its superior hydrolytic stability and resistance to chloramines, is becoming more widely used in these applications. Even fluoroelastomers are being used in gaskets for CPVC piping, where leaching of plasticizers from other elastomers can compromise the piping.
Rubber-bound fiber sheet finds application in a variety of flange gaskets where, because of limitations on size or gasket stress, homogenous elastomers cannot be used. Polytetrafluoroethylene based materials are used in applications where chemical resistance or high levels of purity are required. Glass fiber reinforced epoxy is widely used in gaskets where mating flanges must be electrically isolated .

Valve casting industry should attach much importance to the development trend in the diversification

Although valve casting products have broad prospects, the per-capita consumption level of valve casting products in China is not high in the world at present. The valve casting industry belongs to rising sun industry, which has become the fundamental material industry that nips and necks with steel, cement, timber and other industries. Domestic far-sighted entrepreneurs, investors who invest in the safety valve casting industry believe that they must be smooth in days and get right time.

But it is highly significant that the threshold of investment in the valve casting industry has been rising. As the relevant industry has presented the development trend in the diversification and depth, the status of the valve casting products has gradually expanded from the commodity to a broader industrial area; high-tech field puts forward a higher requirements for valve products; at the same time, the environmental protection treatment, utilization and recovery of all kinds of discarded valves is becoming more difficult.

In the market environment of fierce competition, the pump valve manufacturing enterprises unceasingly change the development ideas of enterprises, comply with the development of the market and change marketing mode for pursuing the enterprise survival. Many enterprises will put their sights into the internet. The pump valve industry can either select to cooperate with the large-scope e-commerce company or choose to collaborate with network marketing outsourcing, to constantly strengthen the network marketing and stride forward the real sense of the e-commercial road.

Valve industry is a huge industry group which plays an important role in the national economic construction. According to the incomplete statistics from the pump valve transaction network, national pump valve manufacturing enterprises is not less than 200 thousand, the personnel engaged in the commerce of the pump valve is more than one million. It is reported that at present many pump valve manufacturing throughout the country have joined the electronic commerce circle. But relatively speaking, there is a certain difficulty in business plan that the enterprise is completely independent to implement; and there are bottlenecks existing in the manpower, resources and technology.

Increase more support to push forward the high-end development of the valve industry

The development momentum of China valve industry is fierce, but under the excellent background of industry situation, there are some problems worth worrying about, especially domestic valve enterprises focus on low-level, small-scale, family-owned enterprises, which is a big constraints and bottlenecks for the future development of China valve industry.

Along with the country accelerating the development of the equipment manufacturing industry policy, the priority will be further given to the development of the general basic manufacturing industry. China is faced with the arrival of the industrial era. The petrochemical industry, power sector, metallurgic industry, chemical industry and urban construction will increase demand on the valve products.

The competition of the valve market is heating up. Some of the ordinary valve markets have tended to saturate and presented excess supply, which makes the development of small and medium enterprises increasingly difficult. However, even products with high technological content, there is also a fierce competition in the international market. Still rely on imports in the field of the High Pressure Butterfly Valves, which the future China valve needs to break through so as to effectively push forward the development of China valve industry.

We have faith in the fact that in the wake of the pace accelerated by continuous of the valve industry restructuring, the competition between the valve industries in the future will be the competition between the quality safety and product brand of valve. Products develop towards high technology, high parameter, resistant to corrosion and long life. The domestic valve industry also will present a better development prospect under the vast demand conditions

The development trend and prospect of 2013 valve instruments

In 2013, due to China keep the good investment environment and infrastructure investment constantly, instruments and meters in China butterfly valves industry sustained growth will usher in new opportunities for development. Continuous self innovation, achievement the leading technology, all kinds of products are too many things to see, presents a picture of a booming development prospects. Just because of such technology, makes the Industrial Butterfly Valve Manufacturer instrument and meter industry can remain positive momentum.
Instruments and meters will be an unprecedented big development, the demand for instrumentation products in domestic market will remain at around 62 million sets. Power sector needs more than 5000 sets of other departments needs millions of sets. Shenzhen valve products demand also changes in the structure, proportion of electronic watt-hour meter of watt-hour meter products will gradually increase, from the "11th five-year plan" at the beginning of 5 million to the end of the forecast of up to 15 million units. Meter installation, portable electric meter, digital instrument technology will also increase, the level of products constantly upgrading. So, despite the product total annual demand in recent years won't have too big change, but sales have increasing trend, expected annual growth rate of 11%.
The valve 2013 instrument of development a long way to go, should need continuous efforts, need continuous in domestic product reliability, applicability and performance.

Our country become Asia's largest valve castings machining center

In recent years, the valve casting industry in China into a period of rapid development, has now become Asia's largest valve castings machining center and one of the world's largest valve casting market, especially in the power station valve, chemical valve, the valve and the rise of building materials and food with valve, due to its broad prospects for development, the market attractive profits, at present many enterprise investment to become hot property.
Although broad prospects, but at present the valve casting products per capita consumption level is not high in the world, the valve casting industry belongs to the sunrise industry, has now become and steel valves, cement, wood based materials industry sectors such as neck and neck, eyes of the nation's entrepreneurs, investors, investment casting valve industry, believe that will be suitable timing, right place.
Jin Mo investment network, chief analyst at luo hundred hui, however, pointed out that investment valve casting industry has been a rising tide lifts all boats "threshold", as the related industrial field is plural, longitudinal deepening development trend, the identity of the valve castings products has gradually from commodities leading to a broader expansion of the industry, new and high technology puts forward higher requirement on valve products, at the same time all kinds of scrap valve products task processing of environmental protection, recycling and reuse, will become more difficult.

The best high-quality valve products and services are provided for LNG project

General manager of China, Shengbolai Valve Co., said Zhuo Guizhao, as one of China's largest special valve, ball valves, cryogenic valves professional R & D and manufacturers, the company has 10 years of experience in R & D and manufacturing, with its focus on the special valve to improve the harsh industrial environment of manufacturing capacity and innovation capability, in order to can last constantly producing industrial valve has the world's advanced level of responsibility. The company's goal is to solve the problems of the industry users, provide the total solution for all kinds of terminal user system, striving to become a world-class valve synchronized with the world brand manufacturing enterprises.
Shengbolai Valve Co., Ltd. is headquartered in Shanghai, has 3 production bases, which are located in Shanghai Jinshan, Shanghai Baoshan, Suzhou. China safety valves are widely used in the production of high quality and bad mining such as: high temperature (up to 1500 ℉), high voltage (Class4500), super low temperature (-272 ℃), high particle
Zhuo Guizhao said, the utilization of LNG in China is uneven, the proportion of natural gas in China's energy market is very small, in the continuous development of China's economy and the growing demand for energy, the introduction of LNG to China to solve energy structure optimization, the security of energy supply, ecological environment protection, has an important role in realizing the sustainable development of economy and society. Can be expected in the next 5-10 years LNG will become the main force of China's energy market.

Owing to four faulty valves AERB has decided to delay Kudankulam nuclear power plant

India's nuclear regulator ordered replacement of four defective plug valves of the system that cools the reactor of Kudankulam nuclear power plant after the problem was detected during ongoing pre-commissioning tests.
The defect in the components of the four valves - there are thousands of such devices in a nuclear reactor - was found during pre-commissioning tests early this year, officials said.
"During testing of thousands of indian butterfly valves installed in the plant, the performances of four valves of a particular type were found deficient," R Bhattacharya, Secretary, Atomic Energy Regulatory Board (AERB) said in a statement here Friday evening.
Officials said that the butterfly valves were in the Emergency Core Cooling System (ECCS) that removes heat from a nuclear reactor under extreme components. On finding the defective valves, the Nuclear Power Corporation of India Limited (NPCIL) had procured replacements through its Russian collaborators.
"These valves are requiring larger efforts to get corrected," another official said but added that this was not an unprecedented development.
AERB Chairman S.S. Bajaj said the new components have been procured and were being assembled.
The programme 'requires formulation of detailed quality assurance plans specifying the sequence of activities and identifying the quality control points at which physical inspection/verifications are performed by the Quality Assurance Groups of contractors/manufacturers as well as independently by NPCIL'.
It added that the AERB had cleared for an 'initial fuel loading' at the plant as part of the commissioning activities and that "satisfactory demonstrations of functional capability are a prerequisite for considering the plant suitable for operating phase."

Hale safety valve are designed to regulate pressure whether on outflow setting or an intake

Hale safety valve designed to stress safety maintenance, consistent in the total pressure of the system active. Relief valve to adjust the pressure in an air intake or outflow settings, automatic and immediate locking function, when the pressure reaches or exceeds the normal level. Valve installed in the total pressure of a variety of systems, fire and oil sump pump, and maintain the product must remain a priority. Consult a professional Haier products represent additional information and inquiries orders and the installation of a pressure system and / or safety valve.
1. To observe the overall design. Flanged Safety Valves structure corrosion resistance of bronze and manufacturing in a butterfly style. Butterfly valve vertical thin rotating disk in two connected nodes. Provide valve pressure in a single line of the disk to rotate in a direction based on.
2. Check list. The valve must be read in 75 years and 250 years among psi. Hale all safety valve was originally arranged before the 125 psi sisters and any external pressure system.
3. Rotating the handwheel. Hale safety valves -- or knob -- fully open or close any pressure system, the largest of the 10 full rotation.

Boehner Svea valve won the bidding of national south-to-north water transfer project

At the beginning of 2012 12, Bona Swee Valve Co., the company received the Xinxiang city supporting South-North Water Diversion Project Construction Authority won the bid notice, valves and ancillary equipment procurement projects in the national major project of the South-to-North Water Diversion Project bidding, Bona Swee valve limited company with its good product quality and excellent quality reputation, many competitors in the API Gate Valves in one fell swoop, talent showing itself and the successful bidder, pipe valve the bid procurement of large orders, the total contract amount of about 17270000 yuan, this marks the Bona Swee Valve Co., Ltd. officially in the national major project -- the South-to-North Water Diversion Project and ancillary equipment procurement projects, this is also Bona Swee Valve Co. Ltd. won a big order in sales, the greater is their companies adhere to the quality first, and strive to build quality fruit.
It is reported, this big orders is the Wang Ronghui of this company general manager, sales manager Wang Tingmeng, chief engineer Hu Junchao and the technology sector effort, but also their long-term tracking achieved an important order. Next, to coordinate the work of company will do well this big orders, quality and quantity, try to finish this big order delivery, to make satisfaction for the South-to-North Water Transfer Project terminal user answer.
It is understood, bonasiwei valves Co., Ltd is currently the main production and manufacturing all kinds of products, after just a few years time, the company realized the primitive accumulation of capital, and entered the great-leap-forward development, throughout the country has set up a few branches, has a staff of more than 500 people, engineering and technical personnel nearly 100 people achievement, is China Chemical Equipment Corporation sentinel production enterprises, Tianjin city famous brand etc.. They use the valve products in the energy-saving, environmental advantages, to become China's "king of butterfly, butterfly valve" to do the fine, refine on, walk in the forefront counterparts!

Selected electric butterfly valves with generous appearance and small size

In the electric ball valves and electric control valve in a species. Connection mode mainly has: flange type and clamp. Is an important executive unit in the field of industrial automation control. Belonging to the electric valve and electric control valve in a species.
Jiangsu GAODA Valve Co. Ltd. located in China Town - Yixing Gaocheng environmental protection. The company is committed to "up to" brand valve series product research and development, manufacturing, sales, technical services and personnel training. The main products are produced according to GB, API, JIS, DIN, BS and other standard butterfly valve, ball valve, slurry valve, diaphragm valve, check valve, hydraulic control valve and other special valves more than 1000 kinds of specifications, the main material can be made of cast iron, WCB, CF8, CF8M, CF3, CF3M, pressure is adjustable from 0.6 to 4.0MPa; the path from DN15 to DN1600mm; can use manual, worm gear, pneumatic, electric and other drive mode; working temperature from -196 ℃ to 700 ℃.
Up to the company for a better service in the power plant, refinery, chemical industry, metallurgy, papermaking, shipbuilding, medicine, municipal and high-rise buildings and other areas of the client strictly in accordance with the ISO9001 international quality assurance system, and constantly adopting new technologies, new processes, new materials, and actively develop new products, to provide the new valve products and the best service for all walks of life.

The hydraulic valve device precision & advantages and disadvantages

Appearance of Pneumatic Butterfly Valves, the main difference is that they rely on the power source of the drive. Hydraulic valve stand hydraulic power source, the higher oil pressure to push the piston to drive the valve switch. The precision requirements of the hydraulic actuator is very high, a little a bit processing undeserved cause hydraulic oil leak, the oil cylinder is likely to be scrapped. Is the cause of hydraulic pneumatic valve price is expensive. Hydraulic valve output torque relative to the pneumatic valve, power is strong. Hydraulic valves are widely used in water, steam, water, paper, petrochemical, natural gas, solution and pulp two-phase mixed flow medium, and the dust and gas, powder conveying solid medium containing particles fluid is the ideal equipment, using the hydraulic operation, is more convenient for management automation, remote control, hydraulic signal device, can be used for automation and centralized control.
Hydraulic device is made of hydraulic pressure valves to regulate the opening and closing or drive it by control, motivation and actuators are composed of three parts. Control part consists of a pressure control valve, flow control valves, directional control valves and electric control system composition. Drive by the motor or pneumatic motor, hydraulic pump, tank and so on, is the effective power on the electric or pneumatic motor axis into hydraulic transmission fluid pressure can. Actuator has two kinds, one kind is hydraulic cylinder actuators, realize reciprocating linear motion; The other is a hydraulic motor actuators, realize the rotary motion, the advantages and disadvantages of hydraulic device is as follows:
A, hydraulic valve device
1) the simple and compact structure, small volume;
2) is stable and reliable;
3) can get a lot of output torque;
4) the output torque can be accurately by constant pressure relief valve adjustment, including the opening and closing torque adjustment, even can be reflected directly by hydraulic pressure instrument;
5) easy speed regulation;
6) in power, the sudden accident, still can use accumulator to one or several power operation. The long distance pipeline emergency shut-off valve and wellhead discharge automatically
Valve has a special meaning.
Second, the hydraulic valve gear faults
1) the oil temperature is greatly influenced by environmental temperature, the oil temperature change caused by oil viscosity changes, affect the operation;
2) piping trouble, easy to produce leakage;
3) is not suitable for the signal to produce a variety of operations (such as signal amplification, memory, logic, arithmetic).

Forged steel valves with the following considerations

Forged steel valve often overlooked issue of the amount of grease. Grease gun refueling, operators of low-temperature valve selection valve and grease coupling method, the grease job. There are two forged steel gate valve situation: on the one hand, less fat less grease, sealing surface accelerated wear due to lack of lubricant. On the other hand, excessive grease, resulting in waste. That there is no according to valve type category, the valve sealing capacity of different calculations. Can be calculated valve size and type of seal capacity, and then injected into a reasonable amount of grease.
Forged steel gate valve pressure often overlooked. Operation in the grease, the grease pressure regulated half free floating ball type steam drain valve of a peak and valley changes. Low pressure safety valve, seal leakage or failure, the pressure is too high, the injection port valve manufacturer blocked, the lipid hardening seal or sealing ring and the valve ball, valve plate locking. Resin injection pressure is usually too low, grease into the valve chamber over the bottom, generally occurs in a small gate. The grease flow control valve pressure is too high, hand check insulation valve check greasing the mouth, such as lipid remote control float valve hole blocking satisfied feeling spring closed with a condition for replacing the spanner; another plunger valve is a lipid hardening, to use the cleaning fluid, repeated failure to soften the seal fat, and injection new grease replacement. In addition, the seal type and sealing materials, also affected the grease seal pressure, different forms have different injection pressure, in general, hard sealing grease injection pressure is higher than the soft seal.
Forged steel globe valve the valve in the switch attention to a problem. Ball valve maintenance in the open position when the general state, under special circumstances, choose to close. All other valves can not be punished in order to open spaces. Forged steel valve in the conservation must be in a closed state, to ensure that the grease seal along the trenches filled with ring, if the open position, sealing grease flow directly into the cavity or valve, resulting in waste. The valve greasing, the grease effect often ignore the problem. Operation pressure grease, grease, the switch position are normal. But to ensure that the valve greasing effect, and sometimes need to open or close the valve, lubricating effect on the inspection, confirmed that the ball valve or gate surface lubrication uniform.
Forged steel check valve should pay attention to problem of pressure relief valve and a plug of sewage. Pressure test valve, gas valve chamber sealed chamber and the water temperature rises due to step-up, when to conduct the sewage grease relief, in order to facilitate the smooth progress of the grease. Grease the sealing cavity was full of air and water replacement. Timely relief valve chamber pressure drop, and guarantee the safe use of the valve. After greasing, be sure to tighten the wire blocking the sewage and pressure relief, to prevent the accident. Grease, fat even pay attention to the problem. Normal greasing, the grease away from the nearest exit out of holes in first out fat and grease, and then to the low end is the high point, successive, fat. If not by law or not fat, prove the existence of plug, Qingtong processing.

The structure characteristics and principle of flange three eccentric multi-level hard seal butterfly valve

1 flange three eccentric hard-seal butterfly valve multi-level product can be applied in the petrochemical industry, food, pharmaceutical, textile, paper, electricity, sewage treatment, water supply and drainage and smelting and other industrial piping. Available in a variety of gases, liquid, semiliquid and micro-pmethodsicles powder pipelines or containers as the control media organizations to open and close the flow. Flange three eccentric multi-level hard-sealed butterfly valve can be installed in any position.
2 flange Butterfly Valves series, has a certain self-cleaning capacity, used in steel works, municipal pipelines, sewage pipes can show a variety of advantages, without maintenance, and good sealing performance, convenient operation.
And
1 flange three eccentric multi-level hard-sealed  butterfly valve is the biggest difference with other: use three eccentric structure design. The design of the installation disc center and the center of rotation rigorous eccentricity. When the valve is opened at 10 ℃ and fully open, the sealing surface of the valve seat and valve disc is in a non-contact state, and closed the butterfly plate with the stem and the valve seat sealing surface deflection swing into the closed. The process for opening and closing of small, no wear and prolong the service life of the valve.
2 butterfly valve seat adopts embedded O rubber ring or fluorine plastic sealing pad and combined seals. Therefore, the temperature and wear self-compensation and other functions, to ensure that the valve is closed without leakage.
3 when the valve seat sealing pipeline fluid pressure incoming letter slot, because the Posson's component action principle, make joint seals in the pipeline pressure and O ring expansion force is generated, the valve seat sealing surface squeezed to the butterfly plate and the valve seal. Increasing this unique seal structure with the line pressure can produce greater sealing force.
4 the butterfly valve seat can fine tune. In the use of a certain number of years after the valve, when the sealing ring to wear appears leakage, can not open the valve in case, by the adjusting screw to seal to the butterfly plate direction tuning to press ring sizes needed, you can get the same compensation and sealing performance of the valve is the new.
5 flange three eccentric hard-seal butterfly valve multi-level series except with manual device, can be equipped with pneumatic or electronic device manual butterfly valve, pneumatic butterfly valve (can be attached to the feedback signal and equipped with electro-pneumatic valve positioner) and electric butterfly valve three kinds of six series products.

Flowserve valve can perform specific functions and represents comprehensive lines in the industry

On behalf of the Flowserve China Gate Valves provides one of the most complete line in the industry. Our valves can be custom designed to perform a specific function, for our customers unique flow control environment.
Flowserve valve for the most serious and the requirements of the industry, including the corrosion of high level, extremes of temperature and pressure, zero emissions and nuclear power plant.
By the strong engineering and global support, Flowserve provides valve design, help customers to maintain production goals and maintain facilities operating at peak efficiency.
Emerging economies in non-OECD countries will continue to expand at a historic high, if temporarily reduced, speed. Their request is issued major engineering, design, production, and supply chain obstacles for large equipment and higher performance rating, need special expertise and a lot of innovation.
One of several major obstacles facing the valve industry is the engineering application of professional knowledge steadily decreased throughout the industry -- from manufacturer to contractors and end users of plants. Training new cadres of the flow control engineers and technicians to specify and maintain the equipment will be needed in addition to the new professional software and programs, allowing the user to correct the valve technology, application effectiveness and the specified device despite their lack of experience.

Festo introduced MS9-SV safety valves which offer many features

Festo today introduced the MS6-SV and MS9-SV safety valves. These safety valves offer many features, including compact size, soft start functionality, and advantageous price versus performance ratio. The MS6-SV is available in Performance Level c and e units; the MS9-SV is available in a Performance Level c unit.
Both the MS6-SV and MS9-SV have integrated soft start and exhaust functions in a compact unified body. OEMs and end users have the flexibility of mounting these safety valves as stand-alone units or as a component of the modular Festo MS air preparation system.  
The MS6-SV-E series is certified to the DIN ISO 13849-1 safety standard – category 4, performance level e. This valve has an extremely high exhaust rate for its size – 9,000 l/min from P2 to P3. The valve delivers continuous testing and sensing of the safety function.
The MS6-SV-E-ASIS valve option has an integrated network connection to AS-Interface Safety at Work, which eliminates the need for an additional safety relay. The ASIS valve option includes switching status sensing and diagnostic functions. The input and output pressures P1 and P2 are internally monitored and can be read via the AS-Interface bus.

There are many of advantages of Seamless Steel Pipes

The largest benefit to using seamless steel pipe is the increased pressure ratings. When steel pipe is rolled and welded, the weakest point in the pipe is the welded seam. A seamless steel pipe does not have a seam, so the tensile strength is uniform around the entire circumference of the pipe. Steel pipe has nominal pressure ratings that are based on the tensile strength of the alloy (mixture of metals) and the wall thickness of the pipe. Using seamless pipe is more expensive but allows for smaller wall thicknesses and pipe weight, which can affect design and costs.
Because seamless steel pipe is a continuous extrusion of the alloy, it takes advantage of true roundness of the circumference. Welded seam pipe invariably is not as round in the cross sectional area as a seamless steel pipe because the welded pipe is wrapped around another form before welding. The welding adds heat, and the equipment adds stress to hold the pipe together. This process introduces variables that allow for warping of the roundness. Seamless pipe maintains the round cross-section, which is important during installation and the addition of pipe fittings.

Although seamless pipe is the most expensive steel pipe, it is the most reliable with the fewest failure points. Because of this, pressure calculations are easier to perform because the weld quality is taken out of the equation. Another advantage to using seamless steel pipe is its strength under loading. Empty pipe has a certain weight that must be supported over long spans. When that pipe begins transporting material, the weight of the material must also be taken into account. Seamless steel pipe has strength benefits compared with welded pipe. Most pipe failures and leaks take place at the welded seam.

How to remove and replace Delta Ball Valves

Many of Delta’s single-handle faucets contain a ball valve assembly. In this type of faucet, one handle controls both the temperature and flow of water from the faucet. Inside the faucet body, springs and valve seats support a metal ball and allow it to rotate in the turn direction of the handle. Over time, the springs and seats, and eventually the metal ball itself, can wear and cause leaking from the faucet. Repairing a Delta ball valve faucet requires replacement of the defective parts.

1. Remove the faucet cap and cam packing. The faucet cap is a chrome piece that covers and protects the inside parts. To remove, loosen the white plastic adjusting ring by placing a flat-head screwdriver in one of the four notches and tapping in a counterclockwise direction. Then, unscrew the faucet cap. If the cap will not budge, use a jar opener to provide extra gripping power. Lift off the white plastic cam-packing piece to expose the ball valve. Clean any hard water deposits from the piece by wiping it with a soft cloth dipped in a little lime scale remover.


2. Remove and replace the ball valve and seal/spring combinations. Grasp the ball valve stem and lift up. Inspect the underside of the ball for signs of wear. Signs you need to replace the ball include wearing of the metal around the holes, scratches, or a brass color appearing from underneath the metal plating. Remove and replace seals and springs. Use a flat-head screwdriver to pry out the three spring/seal combinations and discard. Slide a spring onto the open end of each rubber seal and then reinsert in the faucet body, using your finger to push them into place.

3. Reassemble the faucet. Replace parts in this order: the new ball valve, cam-packing piece, faucet cap, handle, and cover plate. Turn the water back on and test the faucet for leaks. If leaking occurs, remove the faucet handle and tighten the adjusting ring.

The problem's cause and characteristics of bellows globe valves

Bellows globe valves are usually referred to as "for the diaphragm valve, valve is a relatively new category, it has its own structure unique to some advantages, such as switch without friction, the sealing is not easy to wear and open-close torque is little. It can reduce the match of the specifications of the actuator. With multi-turn electric actuators, which can realize to adjust the medium and heavy cutting. Bellows Cast Steel Globe Valves, bellows seal design, completely eliminates the common valve stem packing seal aging fast easy leakage faults, not only improve energy use efficiency, increase production equipment safety, maintenance cost was decreased, and the frequent maintenance, also provides a clean and safe work environment.
Product features:
1, product rational structure, reliable sealing, excellent performance, beautiful appearance;
2, seal face Co carbide surfacing, wear-resisting, corrosion resistance, good friction resistance and long service life;
3, the valve stem conditioning and surface nitriding treatment, has the good corrosion resistance and friction resistance;
4, double seal, it is more reliable in performance.
5, the valve stem lifting position indicator more intuitive;
6, parts materials, the size of the flange and butt weld ends can be reasonable selection according to actual working condition or the user requirements, meet the needs of the various kinds of engineering.
Bellows High Pressure Globe Valves adopts the unique design of double bellows seal which completely eliminates the stem packing seal leakage problem, meet the most stringent leakage level requirements. Such as corrugated pipe failure, valve stem packing seal can provide secondary seal to prevent leakage.
Bellows seal structure not only to eliminate the phenomenon of leaking, and no need maintenance, such as the need to change the internal parts, convenient, simple, fast, and all the parts up to standard and interchangeable.
In the bonnet/bonnet with bonus oil injection hole, valve rod and the nut bushing lubrication.
Bellows seal globe valve adopts unique spherical cone valve core instead of the traditional flat valve core. Manual and rough water control, valve core surface hardening treatment, improves the sealing performance, 6 each of the following can be installed in vertical, the valve core to adjust.
Bellows globe valve is suitable for the nominal pressure PN1.6 ~ 6.4 MPa / 150 lb, working temperature - 29 ~ 425 ° of petroleum, chemical, pharmaceutical, electric power industries under different conditions, such as the pipeline, cut off or connect pipe medium.
Bellows globe valve leakage generally divided into leakage and leakage in the two cases, the cause of leakage. Leakage in general because the fluid contains solid ruined, caused by leakage is the main reason of the corrugated pipe rupture failure sealing boundary. Site usage analysis, main and valve stem leakage outside the structure, working environment and using the operating mode.
Bellows globe valve stem using corrugated pipe, and packing structure double sealing structure, corrugated pipe and the inner ring and outer ring welded bellows components, then with the valve stem and guide body welding, blocking medium through the valve stem leakage to outside. Stem up and down movement distance through the flat key I limit. Valve is closed, flat key I downward movement, until completely contact disc and seat. Open valve, flat key I upward movement, until the flat key I face with packing the face under contact. Because the packing used is PTFE material, material is soft, if excessive open valve, will lead to a flat key I embedded filler, the valve cannot be opened and closed again, and cracking bellows components, result in media leakage along the valve stem. Corrugated pipe tensile length and amount of compression is set according to the valve stroke, if exceed the limit tensile or compression, it could damage the corrugated pipe, corrugated pipe burst, seal failure. Therefore need to increase the spacing device of valve opening and closing, the valve opening and closing process, bellows expansion in the scope of design.

The design knowledge of Check valve slow-closing structure

Open check valves pipeline system as a downstream upstream, close the valve, mainly used to prevent the media back, to prevent the pump and drive motor reversal and the container medium discharge; the most commonly used is the valve around the valve pin rotation of the Swing Check Valves and the valve flap along the vertical lift center the line to move the valve, but the above 2 kinds of valves are closed when the media back speed from the largest decrease to zero rapidly, resulting in water pipes and pipe internal pressure rises rapidly, resulting in water hammer damage to pipeline system, so the general check valve production diameter of 50 ~ 500 mm (1). Water hammer effect to reduce the check valve, check valve used to expand the scope, the original product design basis, an additional relief valve closed deputy, solve the problem of pipeline water hammer boost.
1, the swing check valve with improved structure
In the original swing check valve slow closing Dual Plate Check Valves is additionally arranged on the side. Vice valve installed in the main valve flap side or both sides and connected with the normal flow of medium, medium pressure when the valve is opened, the Deputy valve is opened, the medium into the main valve outlet end through the auxiliary valve hole, so that the main valve inlet end pressure, the main valve valve opening, the main valve and pressure tends to balance; upstream medium, the main valve quick closing in countercurrent medium, while the upper side valve body for the buffer cylinder, vice valve cover is screwed into the valve body upper cover a hole, the Deputy valve and piston rod empty set of a certain gap, O type rubber ring seal between the piston and the buffer cylinder the lower part of the piston and the valve flap, between the flat seal; when the vice valve main valve with closed and closed, due to side valve cover holes in the role, through the medium of small gradually into the vice valve buffer cylinder cavity, the gap between the back part of the medium vice valve and piston rod, thus vice valve piston is slowly closing the. The structure of the main valve off the equivalent of fast closing phase, the Vice-valve slowly off the equivalent of the slow closing phase, based on hydraulic and mechanical transition mechanism of pumping unit shows that the structural design can effectively prevent water hammer boost.
2, lift check valve with improved structure
Lift Wafer Check Valves also known as the end, it can maintain the required suction pump to stop the water column (2); improvement of the valve structure is additionally provided with a slow closing valve as shown in Figure 2 in the main valve between the valve flap and valve stent.
The valve body and the bottom net is arranged between a pad ring, in addition to the increase in the valve seal height; buffer piston and cylinder cushioning rubber, the valve shaft and piston rigid connection, the buffer cylinder and a smaller gap between the valve flap shaft. When the medium downstream, the pressure medium open the valve flap into the main body cavity, while promoting the buffer piston upward; when the medium back, due to open within the buffer tank is filled with media, while the buffer tank and smaller gap between the valve flap shaft, so with the buffer medium in the cylinder is gradually passed through the gap, the main valve valve valve play a role of buffering, the pipeline water hammer pressure to control (Figure 2).

Suggestions for sizing safety Relief Valves that prevents the interior pressure

A safety valve prevents the interior pressure of a boiler from rising to unsafe levels. Typical steam safety relief valves have a large spring that applies a downward force on a metal piston. If the pressure in a steam boiler rises high enough, it will overcome the force of the spring and the piston will lift, relieving the interior pressure. The design and size of a safety relief valve is extremely important for industrial process safety. This sizing refers to the minimum required orifice size inside the Air Valves. Guidance for sizing procedures and formulas can be found in the authoritative reference from the American Petroleum Institute (API), specifically the Recommended Practice 520.

1.Determine all of the credible overpressure scenarios for a steam boiler. This will be the basis for the sizing of the Forged Steel Valves. For example, in a natural gas boiler the gas burner could malfunction, causing excessive heat for boiling the water.


2.Determine the maximum steam generation capacity and the maximum pressure rating of the boiler. For example, assume the boiler has a maximum steam generation of 50,000 pounds per hour with a maximum pressure of 300 psi and a temperature of 422 degrees Fahrenheit.

3.Determine the minimum required orifice size of the valve using the formula from API 520. The formula is A = W/(C x Kd x P x Kb x Kc) x √(T x Z)/M where A is the orifice area in square inches, W is the steam generation, C is a steam coefficient equal to 330, P is the pressure, Kd, Kb and Kc are all constants equal to 1.0 in this case. T is the temperature of the steam, Z is the steam compressibility factor (assume it is 1.0) and M is the molecular weight of the steam, which is 18.01. This calculates out to be 2.44 square inches.

Replacement Regulations and Testing for Pressure Relief Valve Leaks

Learn about pressure relief valves

In high pressure containers such as industrial boilers or heaters, which are subject to high heat inflow, a pressure release valve acts as an outlet for excess heat to flow out. The valve is programmed to open when it senses high heat in the system, and is normally activated by a spring which reacts when it feels pressure. When a relief valve develops a leak, it can create serious problems. The Environmental Protection Agency (EPA) and Department of Transportation (DOT) have regulations on leaks in a pressure relief valve.

VOC Leaks
A pressure relief valve must be equipped to detect volatile organic compound (VOC) leaks. Since a background leak can be present without being detected, the EPA stipulates that the scale of the pressure release valve must read at plus or minus 5 percent of the permissible leak limits.

Replacement Testing
According to the Department of Transportation, when a pressure relief valve leaks and is replaced in cargo vessels, the new device installed must have a leak rate of less than one liter when tested. The vessel's pressure relief valve must be tested by an agent authorized by the DOT to certify emissions on cargo vessels.

Replacement Regulations
VOC Leaks
A pressure relief valve must be equipped to detect volatile organic compound (VOC) leaks. Since a background leak can be present without being detected, the EPA stipulates that the scale of the pressure release valve must read at plus or minus 5 percent of the permissible leak limits.

Replacement Testing
According to the Department of Transportation, when a pressure relief valve leaks and is replaced in cargo vessels, the new device installed must have a leak rate of less than one liter when tested. The vessel's pressure relief valve must be tested by an agent authorized by the DOT to certify emissions on cargo vessels.

Replacement Regulations
In order to prevent leaks, the EPA mandates that relief valves be replaced at regular intervals. The time period between replacements is determined by the kind of heat producing device in which the valve is installed. State or city authorities can designate the replacement time frame for a given application of a pressure relief valve. For instance, in California, the flow rate of a heater with a pressure relief valve is determined by the number of square feet for which the heater provides heat, and the higher the flow rate, the more frequently pressure relief valves have to be replaced to avoid leaks.

Stainless steel ball valves give you a healthy environment

Today, specially invited Chinese Water Resources Institute Professor Zhou and South Group Wenzhou jiechao valve industry limited company's total two guests, to discuss topics related to the quality of drinking water at present.
Q: Lu total, why stainless steel ball valves can maintain the quality of drinking water in the transport process?
Answer: the 3 links of variable quality of drinking water is just Professor Zhou said bad, one of the second transportation links will be used before the valve, the valve are made of carbon steel or copper, after the 2 materials valve used for a long time, corrosion rust, corrosion and rust will produce metal ion for example, Cu ions, the metal ion is harmful to human body, Professor Zhou also talked about just now. The use of stainless steel ball valve greatly reduces the valve corrosion problems, so as to ensure the quality of water in the transport process.
Q: Lu total, at present and the South Group Wenzhou jiechao Floating Ball Valves industry limited production of stainless steel ball valve is mainly used in what areas? Or customer group is what?
Answer: each industry, but in recent years, the water company to purchase a large amount of.
After a brief discussion, let us understand that such a truth, only the source of drinking water quality is not enough, the transportation of water is also very important. Fortunately there is similar and South Group Wenzhou jiechao valve industry Co. Ltd.

Two types of check valves can be installed in an Air Suspension

Air suspensions are gaining popularity every day. Installing a set of airbags or air cylinders can be simple enough to be installed at home, but it's important to do it right. One of the safest add-ons that you can make to an air suspension is adding check valves. A check valve allows air to only flow one way in an air system. Why is that important? Because if for some reason you lost pressure in a line, the entire air system would not evacuate, allowing you to either pull over to the side of the road, or get a jack under the truck to fix the problem. Installing check valves isn't complicated; it just takes some time.

There are two different types of check valves that can be installed in an air suspension, the only difference is how they mount. One style has male pipe thread on both ends, and the other has female pipe thread on both ends. Depending on how your air system is plumbed, one of these may be better than the other; it just depends on your specific setup. We'll start with a completed valve assembly and, for this example, will be using the male pipe thread style Wafer Check Valves.

Several methods of how to assort Steel Pipes

Steel pipe is used mainly in the home for gas supply lines and is coated black. Small lengths of stainless steel pipe are also used in connecting water heaters to copper water supply pipes via joints called dielectric unions. API 5L Seamless Steel Pipe comes in different lengths and is threaded at both ends, so it's important to calculate the required length of each pipe before purchasing it. Though it's possible to cut and thread the pipe yourself, special tools are required and this is usually done only by professionals. However, pipe can be cut and threaded to different lengths at major DIY stores.   

1.Apply thread compound across and into the threads at each end of the first piece of pipe. Then screw one end by hand into the fixture (such as the house's gas meter). Tighten the pipe to the fixture using a pipe wrench.

2.Screw on a metal coupling to the other end of the pipe--again, tighten it in place with the wrench.

3.Thread the second piece of steel pipe into the other end of the coupling and tighten with the wrench. Continue in this fashion until all pipe and couplings are in place. Then at the last piece of pipe, screw on a shut-off valve--apply thread compound to the threads first--and tighten it in place.

How are Stainless Steel Pipes handle properly

Stainless steel is used for many different applications because of its non-corrosive surface, light weight, ease of cleaning and looks. Because of stainless steel's durable nature, there are few precautions to take when handling stainless steel pipes. There are, however, some guidelines to follow to ensure you get the most out of those pipes.

1.Wipe the Stainless Steel Pipes down with a clean rag and warm water to remove any dirt and oil from the surface. Dirt and oil can affect the corrosiveness of the pipes, so it is important to remove them before installation. After the pipe has been wiped down, rinse it with water and dry the pipe with a clean cloth.

2.Wear cloth or rubber gloves when handling stainless steel pipes to avoid leaving finger oil on the surface of the pipe. If any finger oil is present, clean the pipe as outlined.


3.Wrap the stainless steel pipes in butcher's paper when being stored to protect the surface of the pipes from contaminants. The cleaner the pipe's surface, the better it will hold up to corrosion when installed. If you notice contaminants on the pipe after storage, clean the pipe as outlined in Step 1.

4.Handle the pipe with care when moving and installing it, making sure to avoid causing defects in the steel's surface. Defects, including scratches and dings, can cause the pipes to corrode faster and decrease the life of the pipe. Also, do not paint stainless steel pipes as this can cause corrosion as well.

5.Install the steel pipe using whatever method necessary. If the pipe is exposed, you may clean the pipe with warm water (as outlined in Step 1) as often as you like to protect it from corroding, as stainless steel is not negatively affected by frequent cleaning.

How to spot A Stainless Steel Valve with high quality

Stainless steel is an excellent material for making valves. Stainless steel is highly resistant to corrosion and heat, and is an all around durable metal. A stainless steel valve holds up better over time than an ordinary steel or aluminum valve due to its resilient properties, making it a higher quality valve. Being able to identify stainless steel valves will enable you to determine whether or not the valves in your home are made of high quality metal.

1.Examine the finish of the valves. Stainless steel has a finish much brighter and more reflective than ordinary steel.

2 .Test the valves to find out if they're magnetic. Steel is magnetic, unlike copper or aluminum. All stainless steels are magnetic with the exception of austenitic grades; however, even some austenitics can become magnetized. If a magnet sticks to the valve, it is most likely steel.

3. Compare the magnetism of the valves to an ordinary piece of steel. Stainless steel has a weaker magnetic pull than ordinary steel. If your magnet sticks to the ordinary steel much better than the other valves, they are most likely stainless steel.

Types, Problems and Benefits of butterfly valves

Types
Depending on the usage and pressure encountered, butterfly valves come in a wide assortment---from resilient (which uses the flexibility of rubber), to low or high pressure (tricentric) valves, industrial, wafer, plastic to stainless steel and manual or automatic.
Problems
The inability to thoroughly remove all residual substances due to its design is a drawback to using the butterfly valve in some situations. Highly corrosive or abrasive material will wear a valve down quickly; the valves are not recommended for those types of application. Improper (or careless) installation often leads to complaints about the Carbon Steel Butterfly Valves.
Benefits
There are many benefits in the use of a butterfly valve. On the whole they are priced lower than other types of valves. Due to the minimum parts involved in a butterfly valve they have a long operational life and are reliable. Their simple design makes them easy to maintain. Most butterfly valves are lightweight and compact. Butterfly valves are designed to withstand a wide range of temperatures and still work.

Distinction Between Globe Valves and Ball Valves

While the purpose of a valve is to regulate the flow of a fluid, there are different types of valves for specific applications. Two common types are ball valves and globe valves.

Function
Ball valves have a chamber with a spherical ball that has a hole bored into it. The ball is connected to a handle, which is turned parallel to the line of flow to increase the flow of fluid or perpendicular to the line to stop the flow. Globe valves have a plate with a hole in it, and a disk or plug completely or partially fits into the hole, slowing or stopping flow, according to Peco Valve.

Ball Valve Benefits
Ball valves allow the user to see exactly what position the valve is in. If the handle is perpendicular to the line, the hole is facing perpendicular to the line, and therefore is fully closed.

Globe Valve Benefits
Globe valves offer greater precision than other valves when it comes to regulating flow, according to the GlobalSpec website. There is also less risk of water hammer, or the surge of pressure, when a valve is quickly closed.

Ball Valve Applications
Ball valves are used in high-pressure and shutoff applications, including chemical plants, according to King Valve. Because they do not wear easily, ball valves are often used where a valve is needed in the off position for extended periods.

Globe Valve Applications
Globe valves are used in applications where flow needs to be finely tuned. The seat, or the area that the stopper makes contact with, can deteriorate over time, causing leaks, so these are a poor choice for shutoff applications. Globe valves are designed to restrict flow, so they also are not ideal for operations requiring full, unobstructed flow.

Function,Significance,Features and Appearance of globe valves

A globe valve is a somewhat simplistic design but is crucial to modern plumbing and manufacturing. In use for more than 139 years, the globe valve was originally designed to help with the newly invented steam engine. The globe valve design is so efficient its remains a mainstay in pluming and industry here in the 21st century.

Function

The A351 CF3M Stainless Steel Globe Valves is used to regulate the flow of liquid in a pipeline. The most common application of the globe valve is a standard water faucet. When the wheel (handle) is turned, a disc is lowered or raised. When the disc is fully lowered, the water supply is shut off. When the disc is fully raised, the water flow is at its maximum rate.

History

The first patent for the globe valve was issued in February of 1870 to J.H. Davis.

Significance

The globe valve's invention coincided with the invention of the steam engine. The steam engine required better and more reliable valves to control water flow. 

Features

The globe valve has several primary components. The wheel (handle) is connected to the stem which is in turn enclosed in a bonnet. The stem controls the movement of the disc which, when closed, fits into the seat to block water flow.

Appearance

Most globe valves have a spherical body with the stem and wheel extending from the top of the sphere. The shape of the body is where the globe valve gets its name.

How to Maintain Water Valve and Flanged Safety Valve

Leaky water valves pose several different problems for home owners. The constant dripping sound can be an annoyance, the water escaping from the valve will elevate your water bill---and the liquid that rests on the floor or next to the foundation of your home will cause damage that may be irreversible if not taken care of immediately. Leaking water valves can be replaced, but the novice will find it easier, cheaper and quicker to replace the damaged fixture. All home owners should know a few basic plumbing skills, such as how to replace a leaky water valve.

Shut off the main water supply to the house. Locate the main supply valve just inside the home and turn it clockwise to prevent any more water from entering the plumbing system of the house. Open all of the water faucets in the house and allow them to run to purge all of the water from the system. Wait 3 hours for the system to cool completely if you replace a hot-water valve.

Place one pipe wrench on the pipe next to Flanged Safety Valves that is to be removed. Hook the second pipe wrench onto the valve itself. Spin the second pipe wrench counterclockwise while holding the first wrench firmly in place. Remove the faulty valve and discard it.

Wipe the pipe clean with a rag. Paint a thin layer of sealant, also known as "pipe dope," onto the threads of the pipe to make the pipe pressure tight and leak proof. Twist the replacement valve onto the threads of the pipe. Remember to hold the pipe with one wrench when you tighten the new valve with the second wrench. Restore the water supply to the house. Watch the faucets and turn them off when there is no more air coming out of the line and the water runs smoothly. Wipe up any water that leaked from the old valve with your rags. Check the new valve to be sure it's not leaking.

The operating requirement for steam hydrophobic valves

(1) excluding condensed water vapor does not leak. The exclusion of condensation from time to time, no leakage of steam hydrophobic Carbon Steel PTFE-Lined Valves is the most fundamental condition. Therefore, although it is excluded and the accumulation of steam condensate separation device, but not as condensate traps, and as steam traps. Hydrophobic valve action is accurate, sensitive means of condensate produced opening, closing the case. That exclude condensate, trap open, rapid discharge; discharge end can quickly shut down, prevent leakage of precious steam. This is the trap of the main performance. That is to say, the Cast Iron Valves is fully open and fully closed two cases, if the switch in slow motion, the switch is not in place, will cause the throttling effect, easy to cause the overall damage to the trap, but also the main reason the steam leak.

As on the action principle, Forged Steel Valves is fully open or fully closed, open, close the action. According to the different types, there may be continuous and intermittent discharge of two types of emissions.

(2) can be excluded from any place in the steam system all condensate. Traps must have to condensate produced any part of high-paying, accurately troubleshoot piping, steam use equipment, heat exchangers and other major equipment and steam system.

(3) simultaneous emission of air and condensed water. The air mixed with steam equipment, originally mixed in the steam, the steam into water only to be separated. It is in the heat transfer equipment using steam is formed on the surface of the air layer, seriously affecting the thermal conductivity, so the air must be excluded.

(4) applies pressure range. For the trap, if the pressure has changed slightly the performance to be affected, or even stop the action is not enough, need it in this case the performance is not affected, and can adapt to any pressure. At the same time the trap back pressure to allow a large degree.

(5) easy to repair and maintenance. Structure related to the requirements and the drain valve. Requirements of hydrophobic valve has the advantages of simple structure, fewer moving parts. In order to make the movement of the valve components do not produce stress, should be day to choose suitable materials, more important is its structure should be easy processing. In short, the steam trap management should be no set full-time staff regularly carry out maintenance work, that is to reduce the cost of repair.

(6) high practicality. The trap should be small in volume, light weight, high life, low price, and not because of air or steam barrier and the loss of the drainage capacity, occurrence and air blocking and steam vapor lock and other accidents.

The working principle and structure of stainless steel oxygen globe valves

Oxygen valve structure:

1 Globe valves structure in the form of the end, the end of the year, DC and rectangular. Straight through processing is the most common structure, but its fluid resistance.

2 DC resistance is a kind of liquid, containing solid particles or liquid viscosity. A forged angle body right, compared with the common way for small

The high pressure stop valve.

In the liquefied petroleum gas (LPG) in the reservation station, which is the oil refineries, chemical plants, petrochemical plants, liquefied petroleum gas, as a control valve used for lifting equipment.

Two, the working principle and structure

1 rotate the hand wheel clockwise, stem moves down, down to close the valve sealing surface, by cutting. The reversal is open, the highest point in the mentioned stem sealing work.

2 the valves is increased by a larger signs. There are two countries open the valve sealing, packaging and protective packaging layer.

3, the valve and the surface of the nylon products, the formation of filling filling sealing soft elastic material, good sealing performance.

Properties of oxygen valve closed

(1) simple structure, production of the door, and easy to maintain.

(2) the sealing surface is not easy to wear and abrasion, valves and valve sealing surface, open and close the sliding abrasion between the seal is good

Okay, good sealing performance, long service life.

(3) to open and close the valve stroke, thereby closing the valve height is less than the door, but the door structure.

(4) to open and close torque to open and close more effort, opening and closing time of directors.

(5) and the fluid resistance is small, the valve channel of communication, more twists and turns, small fluid resistance, energy consumption.

(6) when the common method of flow direction, downward nominal pressure PN ≤ 16MPa communication valve, pressure class under the guidance of the valve, the general use of communication management. In order to improve the seal. Cut-off media only one-way flow valve in use, you can't change the direction of water flow.

(7) the position is usually subject to erosion

The assortment of stainless steel check valves

Swing check valves

Swing Check Valves with the humble hinge institutions, there is also a like the door of the disc is free to depend on the inclined surface of the seat. In order to ensure that each disc to seat the appropriate location, in valve design hinge agencies, in order to have enough plug valve kai xuan space, and the valve genuine and comprehensive engagement with the seat. All disc can be made from metal, can be embedded in the metal on leather, rubber, or synthetic coverage, depending on the use of performance requirements. Swing check valves in the fully open conditions, almost unimpeded fluid pressure, so the pressure drop across the valve is relatively small.

Lift check valve

Lift check valve is located in the body of the valve seat valve seal surface. In addition to this check valve can be freely valve movements, like the rest of the cut-off valve, fluid pressure from the valve seat valve seal surface lift, medium return led to the disc back to seat, and cut off the flow. According to the conditions of use, valve can be all-metal structure, can be embedded in the disc on the shelf rubber mat or rubber ring form. As cut-off valve, fluid lifting of check valve through the channel is narrow, so that the lift check valve through the pressure drop than the swing check valve is big, and swing check valves are very few restrictions.

Stainless steel check valve

1) and the original plastic check valve production principles are the same. Overall is stainless steel or stainless iron. Need stiletto installation, advantage is that have the effect of the unidirectional fire, smoke prevention effect.

2) is the latest card button to install the new check valve, stainless steel or stainless iron is the whole, the vane type hinge type opening and closing valve sealing performance is better. Installation is more simple, the only is insufficient, or one-way fire. Could not reach the requirements of state administration of fire control.

The detailed information of stainless steel check valves

Nominal pressure or pressure level: PN1.0-16.0 MPa, ANSI CLASS 150-900, JIS10-20 k or nominal diameter diameter: DN15 ~ 900, NPS 1/4 ~ 36 connection mode: flange, butt welding, thread, socket welding, etc. Applicable temperature: 196 ℃ ~ 540 ℃ the valve body material: WCB, ZG1Cr18Ni9Ti, ZG1Cr18Ni12Mo2Ti, CF8 (304), CF3 (304 l), CF8M (316), CF3M, Ti (316 l). Choose different material, can be respectively suitable for water, steam, oil, nitric acid, acetic acid, oxidizing medium, urea and other media. This valve shall generally be installed in the pipeline.

The stainless steel check valves is belong to this type of valve, which includes swing check valve and lift check valve. Swing check valve with the humble hinge institutions, there is also a like the door of the disc is free to depend on the inclined surface of the seat. In order to ensure that each disc to seat the appropriate location, in valve design hinge agencies, in order to have enough plug valve kai xuan space, and the valve genuine and comprehensive engagement with the seat. All disc can be made from metal, can be embedded in the metal on leather, rubber, or synthetic coverage, depending on the use of performance requirements.

Swing check valve in the fully open conditions, almost unimpeded fluid pressure, so the pressure drop across the valve is relatively small. Lift check valve is located in the body of the valve seat valve seal surface. In addition to this check valve can be freely valve movements, like the rest of the cut-off valve, fluid pressure from the valve seat valve seal surface lift, medium return led to the disc back to seat, and cut off the flow. 

According to the conditions of use, valve can be all-metal structure, can be embedded in the disc on the shelf rubber mat or rubber ring form. As cut-off valve, fluid lifting of check valve through the channel is narrow, so that the lift check valve through the pressure drop than the swing check valve is big, and swing check valves are very few restrictions.

The analysis and troubleshooting measures of the reason for feel heavy when quickly turning the steering wheel

About 3 to weight different root cause analysis and troubleshooting measures

3.1 Valve core is deviating from the centre of the steering gear, or is in the middle position but with valve set do not match the aperture size of shoulder. Check to make sure that shoulder the sealing is good, the valve core in the middle position.

3.2 valve core and valve suites dirt block, to move around when the resistance is different. Disassemble and clean steering, ensure that the hydraulic oil clean.

3.3 improper adjustment nut. Checking and adjusting nut again.

3.4 the cause of the steering wheel wandering can also lead to turn left in the vehicle weight is different.

4 turn Stainless Steel Pipes when the steering wheel quickly feel heavy root cause analysis and troubleshooting measures

4.1 the oil pump drive failure sometimes. Drive belt skid or drive gear (key) wear. Check the oil pump parts of the tension of the belt can be adjusted, repair or replace the drive gear (key).

4.2 the oil pump fault connection parts. Oil pump connection is loose or missing, check the oil pump connection part, ensure the pump connection is firm and reliable.

4.3 flow control valve failure. Flow control valve spring is too soft or leaked seriously, leading to a sharp turn to the oil supply shortage. Check the flow control valve, replace if necessary.

4.4 relief valve failure or leakage is serious. Check valve, if necessary, replace.

4.5 pump excessive wear, internal leakage is serious. Check the oil pump working condition, repair or replace the pump.

4.6 oil pump type selection is wrong, making oil shortage. Replace the right pump.

The structured development of valve industry is speeded up in China

China Valve industry in the people economic growth, as the key, in the process of manufacturing of a nervous have very intense influence, national economy and people's livelihood in the tension field, management and disposal of industrial waste water, atmospheric will network requires a lot of in such aspects as reform localization of valve set, to satisfied the people economic industry's request for valve production, complete superstition growth of the industry, take the lead in growth, sound and rapid growth, seize market opportunities at home and abroad, open up progress, happy will makes the right ball valve door the important production base in China.

Gate valves manufacture to harsh on quality control, strong to curb environmental, quality and time not neat to each property construction excellent growth and recovery in space. To complete the pinch valve and emergency ability localization, property of collecting valve there is still a long way to go, the valve board should be connect together, the same policy progress, localization of fantasy in fact not remote. Valve industry is manufacturing a tension structure division, to the people to the economic growth of the dying of the influence. Skills of the other depends on WaiYang import valve, but need to have first is the nature of consciousness to cultivate high talent.

The entire valve industry's biggest problem at present is a prominent structural contradictions. These structural contradictions cautious points clear of a outstanding a lot of problem, and then compared with abroad, there are the obvious gap, although foreign big enterprises and brands, but they are small and exquisite, high-end equipment, leading products, strong technical force, not quantity, pay attention to quality.

The valve industry in China is at a critical period of development, on one hand forged steel gate valve industry and nearly 20 years after reform and opening up 30 years of rapid development, accumulated a huge amount of energy, production capacity of excessive supply exceeds demand, enterprises are eager to expand the market size valve, seek the new development direction; , on the other hand, the valve industry accumulated a staggering amount the size of the enterprise. Scale above valves enterprises more than 1500 across the country, and how many valves enterprises below the size? Who also said not clearly, that is to say, a total of 5000 enterprises around China valve industry.

Product structural contradiction is prominent, then compared with abroad, performance in the national construction need of major technical equipment key valve can not timely implementation localization, still need to import large quantities; The whole product structure in the valve industry, high-end valves proportion is not big, mainly concentrated in low - and valves, product prices appear vicious competition, seriously affected the healthy development of the industry. Because the production license system is not strictly carry out, low valve production capacity for rapid expansion over the years, the valve products to further expand overbuilt, increasingly mid-range valve market competition intensified.

How to choose flanged ball valves and female Screw Ball Valve

Flanged ball valves and internal thread ball valve should be how to choose, when a lot of units in the design of pipeline will take this factor into consideration.

First of all, flanged ball valves and internal thread ball valve each have each advantage. Flanged ball valve advantages: convenient disassembling in the pipeline, suitable for some medium and large chemical project. Resistance to acid and alkali stability, resistance to pressure ability strong, lasting stability in use. Flange ball valve disadvantages: the high cost, the volume is bigger, installation time, generally need two completed two or more persons. Choose average is DN15 - DN25 caliber. Internal thread ball valve: the advantages of small volume, convenient installation, generally applicable to domestic outfit building, or a steam pipeline, such as small pipes. Cheap, low cost for factory unit. The defect of internal thread ball valve: damage is not easy to tear open outfit, especially fixed pipe. Continued weak. Able to work under pressure General selection is in (the following the specifications of the ball valves.

Comprehensive view, flanged ball valve and each have advantages and disadvantages of internal thread ball valve, customers can choose according to their actual usage, the working principle is the same. The difference is prices higher than internal thread ball valve flange ball valve, size large

The summary of steel pipes and the impact of it on life

The development of seamless steel pipe production technology began with the rise of the bicycle manufacturing industry. oil exploitation in the early years of the 19th century development, during the two world wars, aircraft, ships, boiler manufacturing, after the second world war thermal power boiler manufacture, the development of chemical industry and oil and gas drilling and transport, etc., effectively driving the Steel pipe industry in the development on the varieties, yield and quality.

Steel pipes used for conveying fluid and solid, not only to exchange heat, manufacturing machinery parts and containers, it is also a kind of the steel. Building with steel pipe manufacturing network frame structure, pillar and mechanical support, can reduce weight, save metal 20 ~ 40%, and can realize the mechanization of factory construction. (tianjin steel pipe company processing workshop with steel pipe space truss structure, the actual save up to 42.9%) steel, made of steel highway Bridges not only can save steel, simplify construction, but also can greatly reduce the area of the coating layer, save investment and maintenance costs. So, any other types of carbon steel pipe products cannot completely replace steel, but steel tube can replace part of the profile and bar. Steel pipe to the national economic development and improvement of human quality of life, is far better than the other steel products. From People's Daily utensils, furniture, drainage, gas supply, ventilation and heating facilities to various kinds of agricultural machinery equipment manufacturing, the development of underground resources, defense and aerospace used guns, bullets, missiles, rocket, etc, is inseparable from the steel pipe.

Is due to the steel tube is closely connected with human life and production activities, steel industry production technology has developed rapidly, not only but also, pipe production in iron and steel industry plays an irreplaceable position.

The development of Valve manufacturing process cater to diversification

For now the valve market phase, it is China valves products renewal stage, the transition from low-end to high-end products, from a single product to the transition of diversified products, for valves industry development provides a good foundation. High-end products introduced to the domestic and abroad, will also introduce some advanced technology and management mode.

From the time, the valve industry overall level is not high, in China a few years ago more small and medium-sized enterprises, start low, for some small workshops. In recent years, change is bigger, it is the improvement of personnel quality; 2 it is to raise the level of manufacturing technology and management such as former ze valve factory, in the process, management has a quite high level.

Valves from manufacturing point of view, the current domestic production craft level is uneven, foreign many large valve manufacturers as their products processing base in China, many mainland companies into the international valve market.

Look from the traditional valve, one is electric this block, such as manual valves, hydraulic valves, electric valves developed rapidly; Second is building valve, power station, oil valve, etc., update speed is faster.

In addition, the valve spare parts market demand is very big. A small processing plant in Shanghai, valve production process is very backward, but it is all over the country sales force of more than 10, ten thousand people. The valve industry in China after years of accumulation and increase steadily, and now is the world's biggest producer of exports has grown steadily each year.

In the future, the development of China's valve industry will tend to be diversified, technology level is higher and higher, the quality will also present the high quality. Combined with China's valve industry planning and management and the implementation of preferential policies, China's valve industry will more and more development space.