The development of China's valve industry

In recent years, the rapid development of China's valve industry, affected by raw material and labor costs and other factors. Exports and expanding market share, has become an important production base for industry and the main product markets. Many of the control valve factory enterprises, small size, lack of core competitiveness, and low corporate concentration, it is difficult to have impact on the international market, largely restricted the healthy development of the valve industry.

An important factor in product technology to restrict the development of our Gas Grill Valve products.

Although the rapid development of a number of township enterprises, but due to the low starting point of township enterprises, technical force is very weak, poorly equipped, imitation products are mostly production, especially for the low-pressure valve serious drainage problems, but these problems do not affect the future of China's valve broad prospects for the industry.

This is mainly thanks to the support and the strong market demand for valve products of national policy, especially start of several centuries, natural gas and electric power, and water diversion projects such as supporting the need for a large number of valve products. Low total import and export profits valve industry in China reached $ 24.1 billion last year, an increase of 28.2% of which exports amounted to $ 22.4 billion, an increase of 29.3%; The total imports of $ 20.134 billion, an increase of 27 percent as the world economy. pick up, import and export of our valve products also increased, but because of the high-end technology and foreign manufacturers are still large gaps compared to the period ahead, product technology will become a bottleneck restricting the development of our valve products.

Until recently, Chinese valve manufacturer is also limited to some small profit target markets, such as Ethiopia, Sudan, Iran, Iraq and parts of Southeast Asia. The market is small, the decision-making process all depends on the price and limited profit margins.

China imported valve manufacturers must pay attention to such an undeniable fact: If you want to survive in the future, they must improve the performance of the previous recession, access to large export manufacturing profit. Currently much of export earnings is largely due to a large number of business opportunities in the Chinese domestic market, but also the quality of Chinese imports valve manufacturing equipment is not enough to sell overseas.

Our refrigeration parts electric valve market with a bright future

The industry official said, valves in industrial processes, mostly used to control the flow of various travel and fluids such as water, oil, chemical liquid, etc., based on the parameters of temperature, pressure and flow. The plant commonly used control valves have valve, pneumatic fixed temperature valves, solenoid valves fixed temperature system, proportional control valve fixed temperature system, temperature control valves and other types. In the selection of various types of automatic gas stove valves, you should consider the type of heat engine, the required accuracy, quality control valves, pressure drop, flow and structure, the failure rate, manufacturers and service credit and other factors, in order to achieve economic and practical purposes.

On the product itself, due to easy assembly with electric valves, low failure rate, industry and the advantages of automation needs, is the industry more cost-effective choice. Because use of conventional pneumatic valve, inevitably a pipe, solenoid valves and the compressor can become, while the electric valve is a motor-driven, easy to install, and electric valves installed with the original factory automation line will be able to save other costs. In addition to motor-driven way to turn more smoothly, without excessive momentum shortcomings, failures can be substantially reduced.

With the continuous development of the market of electric valve of science and technology, but also to the high-tech, high-parameter, strong corrosion resistance, high life direction.

At present, China's valve industry and foreign valve industry gap is more obvious, the presence of the four major integrated Gap: Gap First, technological innovation ability; second gap on the process; the third is the gap between the quality of management and equipment; Fourth Process gap management. It also allows us to see our own shortcomings, in order to find the gap between the real problem, to improve and enhance.

China valve market will maintain steady growth

ARC latest "control valves, actuators, positioners China market research report," said: China valve market in the coming years will continue to maintain steady growth.

In 2013, oil refining, chemical, petrochemical and other industries capital spending to maintain growth year on year in 2012, thermal power, steel and cement industries capex declined year on year. Spread over the Gas Grill Valves and the valve competitive market situation characterized by continuing to drive forward the commercialization of falling prices, in 2013 the overall control valves, actuators and positioners (CVAP) market demand driven by the factory owners still achieved a steady growth.

Despite the dwindling of large projects, the country's major oil companies and other state-owned factories to develop a localization policy of critical equipment, foreign valve supplier successful implementation of value-added products and value-added services, namely intelligent valve products and throughout the plant life cycle goods and services. At the same time, the domestic valve suppliers for product differentiation made a great effort, some manufacturers put a lot of money on top of the high-end product development, and in the coal chemical and natural gas pipelines and similar special or complex applications being made huge profits. Domestic valve manufacturers to high-end, value-added and foreign manufacturers of valves, valve market which will undoubtedly become a major bright for years to come and lead the valve market is more diversified healthy competition.

According to the latest ARC "Gas Grill Control Valve, actuators, positioners China market research report" analysis, based on major industry trend of capital expenditure valve applications, industrial upgrading and building demand for intelligent manufacturing plant judgment, China's overall control valve market in the next five years will continue to maintain steady growth. This chapter reports on Chinese control valve market analysis gives professional depth, including quantitative analysis of market size, market segmentation and forecasting future industry trends.

"Control valves, actuators, positioners China Market Research Report" writer analyst Sunbi Yun analysis: in 15-20 years ago, most of the valve suppliers to establish a manufacturing center in China mainly to serve the Chinese market, such as through local manufacturing reduce costs and ensure rapid delivery. Currently, this situation is a dramatic change, many valve suppliers to expand the manufacturing base in China, and even the global manufacturing center moved to China, more or focus on serving the global market. Therefore, the "not so much this change localization strategy for China, as it is reflected in global supply chain strategy valves."

Automatic control valves increasingly popular

In terms of operational efficiency and save energy consumption, the use of automatic control valve is an indispensable part of traditional industry commonly used manual valves, pneumatic valves, the installation cost and efficiency are not and electric valves.

The industry official said, valves in industrial processes, mostly used to control the flow of various travel and fluids such as water, oil, chemical liquid, etc., based on the parameters of temperature, pressure and flow. The plant commonly used control valves have valve, pneumatic fixed temperature valves, solenoid valves fixed temperature system, proportional control valve fixed temperature system, temperature control Gas Cooker valves and other types.  In the selection of various types of automatic valves, you should consider the type of heat engine, the required accuracy, quality control valves, pressure drop, flow and structure, the failure rate, credit and service manufacturers and other factors, in order to achieve economic and practical purposes.

On the product itself, due to easy assembly with electric valves, low failure rate industry and the advantages of automation needs, is the industry more cost-effective choice. Because use of conventional pneumatic valve, inevitably a pipe, gas patio heater valve and compressor can match, while the electric valve is a motor-driven, easy to install, and electric valves installed with the original factory automation line will be able to save other costs. In addition to motor-driven way to turn more smoothly, without excessive momentum shortcomings, failures can be substantially reduced.

Many people think that your electric valves, high cost, it is not true, if a holistic basis, plus many traditional valves and piping installation accessories, the price is not dominant, but they have to bear more of the maintenance costs.

Development Trend of China's pressure regulating valve analysis

In recent years, with the changing environment of industrial technology, advanced manufacturing technology are eager to enter the valve manufacturing. Most manufacturers are in the application of advanced manufacturing technology, investment and manufacturing execution systems used to achieve process automation and machine tools, die-casting, the whole mold and other high precision molding technology, high-precision grinding machines, high efficiency and precision processing technology, surface modification and coating of special processing and material modification technology to produce sophisticated, usable, reliable, high-quality products --- flow control Copper Gas Valves from tiny to large diameter valve; from the traditional to the eccentric single seat valve type rotary valve, V-type ball valve, axial flow valve; from the anti-surge, anti-cavitation cavitation, abrasion resistant to high temperature and pressure regulating valve special valve, special valve; from the big thrust of the pneumatic actuator to quickly respond to the electric actuator; from safety assurance process tightly closed to ensure the environment ultralow leakage. Regulating valve and the development of petroleum and petrochemical process control simultaneously, the formation of the whole process, large-scale, high-parameter products, basically meet the control requirements for petroleum and petrochemical production.
A pressure regulating valve, also known as self-balancing valve, flow control valves, flow control, dynamic balancing valves, flow balancing valves, is an intuitive and easy flow regulation control device, the pipe network application traffic control valve can be set directly from the design constant flow, the valve can be in the action of water flow automatically eliminate the remaining pipeline pressure head and pressure fluctuations caused by deviation, no matter how the pressure changes in the system are kept constant flow setting, the valve These features enable a complete network flow regulator to tune into a simple flow net work distribution, effective solution pipe network hydraulic imbalance.
Pressure regulating gas Burner Valve without external energy, energy in the absence of electric airless workplace, convenient and saves energy.
Finely segmented pressure range and cross each other, high regulation accuracy.
Pressure setting value can be set continuously during operation.
After the pressure regulator valve on the front than the back pressure valve and the valve pressure is available from 10: 1 to 10: 8.
Rubber diaphragm type detection, high precision actuators measured, sensitive.
Using pressure balance mechanism, the regulator valve responsive and precise control.

Soda valve usage summary

Due to the special nature of soda ash industry, all juggling various soda ash business in the valve using the system on, both to resolve its internal leakage problems, but also to solve the leakage problem, but also to overcome scarring, clogging and erosion and other problems with crystallization . Through many years of cooperation with the soda companies, the actual depth, continuous improvement, Valve Manufacturing Co. finally succeeded in developing a fourth-generation soda special eccentric valve, completely solve the above problems Soda normal production management.
1. Currently the use of alkali enterprises pilot valves valve soda companies use are: ball valves, plug valves, globe valves, slurry valves and other materials are mainly: carbon steel, stainless steel, molybdenum, titanium II. Their common feature is the use of short cycle, easily, the leakage. Endoleak making it difficult to cut and control, such as carbonation tower when you want to cook plus many blind plate, resulting liquor leakage, corrosion around the device, increasing labor load. In and pumps, AII pumps, heat pumps, etc. lye overhaul was forced off due to inability to process short-term parking, resulting in the production of passive. Leakage increase the difficulty of site management, hang everywhere "Paste child", taking into account the on-site management, to regularly wash, environmental problems difficult to solve. Scarring caused because the system can not be cut off valve, part of the valve (slurry valves, etc.) and other equally time-consuming switch to normal production management brings many difficulties. Frequent valve repair and replacement, so run, run, drip, leak increases.
Therefore, all soda ash production management personnel, operators, maintenance personnel are feeling due to a Heater Gas Valve problem and brought a lot of work inconvenience.
2. Valve Features
Company for the soda ash business characteristics and requirements, through continuous improvement, and finally produced a corporate site management to meet the requirements of soda ash soda special valves, control valves and other products.
soda special valve (worm gear, pneumatic, electric) Series (cut-off)
The third generation of soda special "O" shaped ball is a high-performance dedicated valve soda developed. Valve, valve seat are made ​​of C4 steel, and the use of special hardened sealing surface is not easy to scratch. C4 steel anti-abrasion, corrosion resistance, superior sealing performance, anti-crystallization, erosion.

A unique line of innovations in valve industry

How metal valve industry to achieve transformation in recent years, energy conservation has become the industrial development principles and objectives, in response to the national call, the valve industry will move in two directions, one from a single species to multi-species and multi-standard development; the second is towards energy conservation direction.
To multi-species and multi-standard development with the valve industry to accelerate the pace of restructuring, Gas Valves For Patio Heater market competition intensifies, some ordinary valve market has become saturated, oversupply occurs, which makes more difficult the development of SMEs. And even relatively high-tech products to compete in the international market is also very intense. Future of the industry will be the product of technological innovation, product quality and safety and product brand competition, product will be high-tech, high-parameter, strong corrosion resistance, high life direction.
Secretary-General of the International Mould & Metal & Plastic Industry Suppliers Association Luo Baihui that future hardware market supply valve to the multi-species and multi-standard developed by a single species, to meet the needs of complete sets of manufacturing projects, the project required an enterprise manufacturing valves, by a valve All manufacturers offer a growing trend.
At present, China in the valve market, it has been able to provide a variety of products: for example, heating valves, environmental protection valves, valves, and other construction. But in the field of high pressure valves still rely on imports, this is the future of the gas cooker safety valve needs to force a breakthrough in the field, in order to truly promote the development of China's valve industry.
Towards the direction from the energy saving point of view, the development of steam traps for the trend, and to subcritical and supercritical parameters of high development, to meet the equipment needs of low-energy direction.
Valve companies clearly understand the status quo is only valid industry, continue to strengthen optimize their products to enhance the sense of urgency, strengthen corporate culture and market service concept, only to do steady and fast, and fast in refinement, refinement Striving to allow enterprises to survive in an increasingly competitive tide valve industry, and development.
China's valve after decades of development, now is already relatively mature, with the increasingly fierce market competition, part of the valve market has become saturated, there has been oversupply, some small businesses is difficult to survive . In the current market environment, valves, pressure valves areas still rely on imports, this is the future of the valve needs to develop the field, and promote China's valve industry into the international. High-end valve in the policy guidance and support scientific research and technology, there will be very broad prospects for development.

Metal valve industry has opened a unique line of innovations

Under the continued good macroeconomic situation, most of the production and sales targets are metal valve industry maintained a rapid growth, but due to the impact of a price war, industry sales revenue and profit fell sharply from last year. Overall, the concentration of the lower valve market industry to produce low-end products. In terms of the core technology has, there is still a certain gap between domestic enterprises and the world's developed countries.

Low value-added Currently, China's valve industry, there are still some problems, such as valve company in China mainly low-level, small-scale, family-owned enterprises. On the product, due to duplication of investment, technology transfer is not enough, our valve leading enterprise products is still low quality mass products.

Resulting in poor product quality reasons domestic gas patio heater valve industry in China's valve industry structure, industrial valves, industrial chain, and the degree of specialization and trade on a large gap with foreign enterprises that are present: the rapid expansion of the market, the original state-owned enterprises have valves Guantingbingzhuan. Although the rapid development of township enterprises, but due to the low starting point, technology is weak, poorly equipped, imitation products are mostly produced.

It is understood that China's production of various valves widespread leakage, internal leakage, the appearance is not high quality, short life, the operation is not flexible and valve actuators and pneumatic devices are not reliable shortcomings, some of the products is equivalent to the last century international level of the early 1980s, some of the key devices require high temperature and pressure and a valve is still dependent on imports.

Low total import and export profits valve industry in China reached $ 24.1 billion last year, an increase of 28.2% of which exports amounted to $ 22.4 billion, an increase of 29.3%; The total imports of $ 20.134 billion, an increase of 27 percent as the world economy. pick up, import and export of our Gas Control Valves products also increased, but because of the high-end technology and foreign manufacturers are still large gaps compared to the period ahead, product technology will become a bottleneck restricting the development of our valve products.

Currently, Chinese valve manufacturer is also limited to a few small profit target market, such as Ethiopia, Sudan, Iran, Iraq and parts of Southeast Asia. The market is small, the decision-making process all depends on the price and limited profit margins.

China imported valve manufacturers must pay attention to such an undeniable fact: If you want to survive in the future, they must improve the performance of the previous recession, access to large export manufacturing profit. Currently much of export earnings is largely due to a large number of business opportunities in the Chinese domestic market, but also the quality of Chinese imports valve manufacturing equipment is not enough to sell overseas.

Regulating valve technology of routine maintenance

In the soda ash production systems, increasing the degree of automation. The valve as an automatic control system actuators, has an important role in stabilizing the production, optimal control and so on. With a long-cycle, high-load operation, the control valve jam, corrosion, vibration, internal leakage and other problems continue to occur, resulting in shorter Gas Water Heater Valve regulating the life, work reduced reliability, seriously affecting the plant safe and stable operation. Therefore, the need for timely and accurately find and fix faults in the routine maintenance is very important, lists some common symptom and treatment methods. For reference only;

A regulating valve leakage
1, the drain valve stem length discomfort.
The reason valve leakage: gas open valve stem and valve stem is too short too long, stem up (or down) the distance is not enough, resulting in a gap between the plug and seat, not full contact, leading off lax internal leakage.
Solutions: should be shortened (or extended) valve stem to stem the appropriate length, it is no longer endoleaks.
2, packing filler leaked leaked reasons: after (1) Fill the stuffing is loaded into close contact with the stem, but this contact is not very uniform, some parts in contact with loose, tight contact with some parts, and even some parts did not contact on. (2) there is a relative movement between the stem and packing, as the impact of high temperature and pressure and permeability of the medium, resulting in packing leak. (3) the contact pressure is gradually attenuated filler, the filler itself and other reasons, the medium will leak out from the gap.
Solutions: (1) In order to facilitate the filler loading, chamfer at the top of the stuffing, the stuffing is placed at the bottom of the gap erosion resistant metal protective ring of small to prevent the filler is medium erosion. (2) packing box and packing contact surface should be smooth, reduce packing wear. (3) use of flexible graphite as a filler, which has good air tightness, low friction, small deformation, friction does not change after re-tightening and other characteristics.
3, the valve spool core seat deformation leak.
Spool valve leak valve production was mainly due to the process of casting or casting defects can lead to enhanced corrosion and erosion-corrosion medium through the fluid medium will give rise to the valve seat material erosion and impact, resulting in valve, valve seat deformation (or wear) is not complete, there are gaps, leaks.
Solutions: valve, valve seat corrosion-resistant materials. Worn deformation is not serious, can be used fine sandpaper grinding, eliminate traces improve the finish. If severe deformation, only replace the Gas Control Valve, the valve seat.
Second, the positioner fault locator is to use nozzle flapper technical principles, the general failure often occurs following:
1) Parts affected by temperature, vibration, resulting in mediation valve fluctuations.
2) The nozzle is clogged foreign material, the locator does not work.
3) The spring constant change, resulting in mediation valve control nonlinear.
4) electrical connector seal is not good, the rain will be positioned coil shorted or open circuit.
Solutions: The locator fixed firmly; sealed electrical connector; improving the quality of air purification, sewage drainage regularly.
Third, the valve action failure
1, the valve no action.
Cause: Insufficient supply pressure; actuator failure; valve no output signal; a foreign body in the gas safety burner valve; high-temperature parts trim stuck.
Solutions: Check the gas supply, restore pressure; good or bad, and the spring force of the spring to check whether the actuator diaphragm rupture and without damage (pneumatic valves); check signal; disintegration valve, a check for repairs.
2, the valve stroke inadequate Reason: Locator no improper calibration, stroke adjustment; actuator spring rating is too small; a foreign body within the valve.
Solutions: re-adjust the locator; adjust the spring; demolition valve remove the object.
3, the valve causes slow movement: packing too tight or packing deterioration of aging; the stem is not straight, misalignment, causing friction big; small air pressure.
Solutions: Recovery for the wind pressure; replace or repair the valve stem packing and other components.
Regulating valve maintenance and repair is a highly professional, technical extensive work involved. To do this work, not only need a solid theoretical foundation, but also has a wealth of practical experience, to take a scientific approach to improve the level of maintenance, reduce equipment failure rates, ensure plant safety, stability, long, full, excellent running to improve production efficiency and economic benefits.

The development of China's valve industry

The implementation of diversified sales strategy, efforts to open up international markets to expand exports.

According to China Valve Association statistics show that currently we valve industry excess capacity, about 40% of production capacity venting, the face of such a huge excess production capacity, the most effective way is to implement diversified sales strategy, vigorously explore the international market . The current international market every year about 60-70 million outlet gas safety valve, China exports 1.5 million, less than 2% share, this side has great potential. First, open up international markets to focus on foreign talent, a group will operate foreign trade professionals understand foreign languages; Second, we must learn to use the Internet and information technology, to make customers to capture business opportunities; and third, and some domestic foreign trade companies can expand cooperation with its channel exports; fourth qualified enterprises can set the point of sale or setting up factories abroad. In recent years, Shandong Yidu valve plant and Suzhou 526 plants are better achieve market diversification. A significant increase in the proportion of exports to ease the contradiction between domestic orders inadequate. Open up the international market but also pay attention to our own advantage, selecting the right export products, currently mainly in the export of labor-intensive products such common valve, in addition to semi-finished casting blank is also very good export prospects.

Fourth, improve enterprise management level, the implementation of management innovation, deepen enterprise reform, the implementation of institutional innovation is in the Gas Control Valve industry in China is currently alternating with a new round of restructuring period.

Has been declining proportion of state-owned enterprises, private, foreign-funded enterprises developed rapidly. According to incomplete data estimation; the proportion of the assets of China's valve industry at this stage, accounting for 40 percent of private, state-owned 30%, the remainder being funded, military enterprises occupy, is expected in the coming years of private and foreign-funded enterprises share will be further expanded. Now Wenzhou private enterprises developed rapidly, and the considerable number of enterprises with certain scale and strength, such as Bethel, never a Zhejiang-dimensional all profits and other enterprises. Current industry mostly state-owned heavy burden due to historical reasons, the mechanism is not live, operational difficulties, but many companies remain equipment, personnel, technology, brand and other advantages; to solve the immediate difficulties to deepen reform, institutional innovation, and fully revitalize the stock of assets, diversify their ownership and the establishment of modern enterprise system. For the rapid development of private enterprises, despite shortcomings and historical baggage mechanisms do not exist, but its development should focus on improving the management level, the implementation of management innovation, to avoid falling into the "family" and "paternalistic" management cliche. In short, the valve industry is full of hope. As long as we have to "Congress" spirit pointer, fully implement the "Three Represents", we will be able to revitalize the valve industry for China's economic development and contribute to the full realization of off target.

China's valve industry in a very favorable development opportunities

Valve industry is an important branch of our general machinery. Its products as critical fluid control equipment is widely used in petroleum, chemical, metallurgy, electric power, urban construction, environmental protection and other industries. Currently, the gas stove safety manufacturing industry is in a very favorable development opportunity. This is because:
First, the state-owned economy continued to develop steadily. Fixed asset investment expanded. Especially several centuries, "natural gas" start "West to East", "South" and the project requires a lot of valve products matching;
Second, with the accession to the WTO, international trade, lowering the threshold and developed countries, the adjustment of product structure, China is becoming the world's largest plant of this emerging trend, manufacture Gas Heater Valve products face greater space for development.
So how to seize the strategic opportunity to accelerate the development of the valve industry. Industry professionals were analyzed from the following aspects:
First, actively promote the consolidation and reorganization among enterprises, as soon as possible to create a group of grade scale enterprise groups.
Valve industry currently produces about 5,000 companies with annual sales of more than 50 million just seven, more than one million three, enterprises with more than 200 million yuan a no. Domestic market share is only the Sufa an enterprise more than 2% the rest were below 1%. This is difficult to produce shocking scale enterprises in the market, and competition with the industry's well-known international companies more difficult. To change this situation as soon as possible, in addition to their own growth factors, the most effective way is through inter-firm alliances, mergers, and restructuring to achieve corporate expansion capital to further expand market share, remain unbeaten in the competition. It is more popular in today's international economic practices, the problem is the development of a directional valve industry in the future period. To emancipate the mind on this issue, according to Congress's "new breakthroughs in reform, the development of new ideas" requirement breaking regional boundaries, breaking the boundaries of ownership, breaking the traditional boundaries of specialization. Whenever possible inter-enterprise union can do to try bold, with 3-5 years and strive to create value of over 500 million and the number of 1 billion yuan of enterprise groups.
Second, pay attention to the adjustment of product structure, the courage to technological innovation, research and development of high value-added products and the international advanced level.
China's Oven Safety Gas Valves industry is now able to produce more than a dozen categories of products.  Such as gate valves, globe valves, ball valves, butterfly valves, safety valves, check valves, throttle valves, plug valves, pressure reducing valves, diaphragm valves, steam traps, emergency shut-off valve, the maximum temperature 570 ℃, the lowest -196 ℃, maximum pressure 600MPa, the maximum diameter 5350MM. Despite the strong support of these products in the domestic economic construction, but it should be clear that most of our products belong to general technical content or labor-intensive products, few have the international advanced level. Recently West-East main line bidding, we all lost the valve business is a regrettable fact. Bitter experience. Valve industry to revitalize national industry to develop there must be implementation of technological innovation, the adjustment of product structure, have the courage to research and development of high-tech, high value-added work with the international advanced level of control valves and valve products such as automatic valves regulating valve, three through the confluence wide, three-way diverter valve, safety valve; ball valve type metal seal all-welded, high-parameters of large diameter valve; and a power plant supercritical C12-A steel valves. Technical implementation of innovative research and development of new products have a couple of choices, one through and research institutions and institutions, such as the recent Kaifeng High Pressure Valve Factory and the Chinese Academy of Sciences under the "three-dimensional" companies to develop power plant boiler main steam valve is a leading international level product, its "pressure drop" significantly below international standards, in the power plant industry has a very prospect; the second is in the form of foreign cooperation or technology transfer, the Zigong High Pressure Valve Co., Ltd. Xin Bilun cooperation with the Italian company is shortened our ball product gap with foreign countries. In addition to these practices, qualified enterprises can be developed independently.

Development Trend of China's pressure regulating valve analysis

In recent years, with the changing environment of industrial technology, advanced manufacturing technology are eager to enter the Gas Heater Valve manufacturing. Most manufacturers are in the application of advanced manufacturing technology, investment and manufacturing execution systems used to achieve process automation and CNC machine tools, die-casting, the whole mold and other high precision molding technology, high-precision grinding machines, high efficiency and precision processing technology, surface modification and coating of special processing and material modification technology to produce sophisticated, usable, reliable, high-quality products --- flow control valve from tiny to large diameter valve; from the traditional to the eccentric single seat valve type rotary valve, V-type ball valve, axial flow valve; from the anti-surge, anti-cavitation cavitation, abrasion resistant to high temperature and pressure regulating valve special valve, special valve; from the big thrust of the pneumatic actuator to quickly respond to the electric actuator; from safety assurance process tightly closed to ensure the environment ultralow leakage. Regulating valve and the development of petroleum and petrochemical process control simultaneously, the formation of the whole process, large-scale, high-parameter products, basically meet the control requirements for petroleum and petrochemical production.
A pressure regulating valve, also known as self-balancing valve, flow control valves, flow control, dynamic balancing valves, flow balancing Gas Valves, is an intuitive and easy flow regulation control device, the pipe network application traffic control valve can be set directly from the design constant flow, the valve can be in the action of water flow automatically eliminate the remaining pipeline pressure head and pressure fluctuations caused by deviation, no matter how the pressure changes in the system are kept constant flow setting, the valve These features enable a complete network flow regulator to tune into a simple flow net work distribution, effective solution pipe network hydraulic imbalance.
Pressure regulating valve without external energy, energy in the absence of electric airless workplace, convenient and saves energy.
Finely segmented pressure range and cross each other, high regulation accuracy.
Pressure setting value can be set continuously during operation.
After the pressure regulator Oven Gas Valve

 on the front than the back pressure valve and the valve pressure is available from 10: 1 to 10: 8.
Rubber diaphragm type detection, high precision actuators measured, sensitive.
Using pressure balance mechanism, the regulator valve responsive and precise control.

Pressure relief valve in the car use

     When a modified car speeding off from the side, we often hear the "hum ......" After a period of accelerated engine sound, came the "ci ......" bang - it gives people a

momentum transfer full of feeling. This is where the sound is coming from? Why on ordinary civilian car, or some high-performance sports cars do not have such a voice (and some ordinary modified car there)?
     In fact, this unique "ci ......" sound is the sound pressure relief valve turbocharged engine emitted when the Safety Valve can be said that all of the turbocharged engine will produce this sound, but for everyday civilian vehicles , the manufacturers would this sound as noise to deal with in the design, to reduce it as much as possible. Approach is to vent the pressure within the intake manifold, so very little noise - this stove valves method is called internally drained.
When we depress the accelerator pedal acceleration, throttle opening, engine exhaust temperature and high pressure exhaust energy driven rotation of the turbine exhaust gas, when the speed reaches the turbocharger work (ie the turbine rotating at 100,000 rpm per minute) turbochargers before compressing the air around the engine intake air increases, improve engine power.
     At this point, we need in the intake duct installation of a pressure thermostatic valve device to remove the pipe from the intake of excess high-pressure turbo compressed air. In fact the pressure safety gas valve is a valve installed on the intake pipe for controlling the supercharging pressure. Opening and closing of the Gas Top Burner Valve is controlled by the ECU (electronic control unit) operated solenoid. ECU will be based on high and low pressure turbine outlet supercharged to make judgments, once the pressure exceeds a Gas Control Valve, will be on the electromagnetic coil is energized or de-energized control to open or close the Oven Safety Gas Valves.
     When the pressure pilot valves is closed to ensure that there is sufficient intake pipe inlet pressure as the basis, when the Manual Gas Valves is open can vent excess gas into the atmosphere, reducing the pressure inside the inlet to protect the engine air intake pipe. So we hear the modified car "ci, ci" sound is relief at the sound of the exhaust pressure Range Dual Safety Valves.

gas valves for pressure testing

P1 pressure of compressed air, the latter from the left end of the input port 10 through the throttle valve, pressure drop P2 output. P2's size can be adjusted regulator spring 2,3. Turn the knob clockwise 1, 2, 3 and diaphragm compression spring 5 8 spool down, increasing standpipe metric fitting the opening of the valve port 10 so that P2 increases. If a counter-clockwise rotation of the knob, opening of the valve port 10 is reduced, P2 decreases.
If the transient elevated P1, P2 will subsequently increases, so the pressure in the diaphragm metric tube fittings chamber 6 increases, the thrust generated by the diaphragm 5 is increased accordingly, the destruction of the balance of the original thrust force, the diaphragm 5 up mobile, 12, a small part of the air exhaust vent through the overflow hole 11. While the diaphragm moves, by the action of the return spring 9, the spool 8 is hydraulic ferrule moved upward, off a small intake valve port 10, to increase the throttling effect, the output pressure decreases until reaching a new equilibrium is attained, the output pressure substantially back to the original value. If you enter the instantaneous pressure drop, the output pressure drop, the diaphragm 5 down, down along the spool 8, the intake valve port 10 open big, throttling effect is reduced, so that the output pressure is basically back to the original value. Rotate the knob counterclockwise 1. 2,3 relax the adjusting spring, the gas acting on the membrane 5 is greater than the thrust force of the regulating spring, the diaphragm upwardly curved, by the action of the return spring to close the intake valve port 10. Then rotating the knob 1, the intake air relief valve body seat 4 and the top 8 is disengaged, then 12, vent hole 11 is discharged through the overflow chamber 6 of the diaphragm compressed air, in a non-output state of the valve .

Part of the British hydraulic fittings By a combination of control valves, hydraulic components bi-directional lock, flat cut-off valve, check valve, safety valve, safety valve and pressure british hydraulic fittings measurement including high flow valves and other components of the British hydraulic fittings one-way valve. Infusion pipeline system consisting of a high pressure hose. Beams and roof beams dumplings before then, and supported by short column to the top of the beam as a fulcrum banjo bolt fittings, can be 15 degrees or swing to the 'Bu as 19 degrees upward, to improve the situation before contact with the roof beams, so close to the coal wall the roof can be effectively supported, avoiding produced before the end of the roof and cut the top of the phenomenon of channeling partings. In front bezel with anti-chip and jacks composed by the help devices. Necessary work, and can extend the anti-spalling and coal wall close to the device can also be retracted to chinapneumaticcylinders allow British hydraulic fittings shearer drum passed. Top beam is the main component of the bracket bearing, front and front beam pick dumplings, dumplings beam rear end of the cover and then cut the top plays a role in the web of welded nest with four columns, connected with the ball joint stud, two side mounted retractable side guards for block partings and anti-down purposes. Due to its direct contact with the top plate, it requires a sufficient area, and requires a sufficient strength. Cover the top of the beam by the hinge pin and roof beams, the lower end of the connecting rod and the base by four dumplings then, its main role is to bear the roof to give the horizontal component bracket, so the column from lateral bending loads, and to prevent caving Advantech stone fleeing stent to ensure the safety of persons and equipment.

Advantages and disadvantages advantages Jic hydraulic fittings bracket covering hydraulic bracket: roof beams short force on the roof of a uniform, controlled from the top frame shift hydraulic fittings suppliers is small, the number of small to support the roof again, help protect the integrity of the roof. Pillar tilt arrangement, a large increase in scope, because the pillars not withstand lateral loads, the stress state is good, not easy to damage. Multiseal metric hose fitting Dagan perfect block device allowing work space and roof, completely separated from the old pond, Jic hydraulic fittings effectively prevent leakage partings, and Chung channeling gangue gangue. Shield hydraulic support for the stable motion mechanism, the horizontal force frame shift caused by the four-bar linkage bear, thus requiring the horizontal thrust of good performance can be achieved with a pressure shift rub the top shelf. Mechanical and hydraulic systems than simple, easy operation and maintenance, work space, large ventilation resistance is inappropriate to have a strong period of pressure and gas emission from large coal.

Reusable hose fitting Detachable hose fittings
When the assembly does not require special equipment, easy to operate, especially for field work, and can be reused, but high prices to customers reusable hose fittings. Withhold reliable high pressure series because the connection has been widely used, but requires special processing assembly withhold equipment, so most customers buy directly hose assembly. Reusable hose fitting for low pressure situations, because of its quick-release for easy maintenance and replacement has been widely used in automotive jic swivel fittings production line, has also been widely used in the mold industry. This is a convenient removable, reusable, sealed modular connectors.reusable hydraulic hose fittings Proved by the production, prolong the service life of corrugated stainless steel hose body 3-8 times. Reusable hose fitting corrugated stainless steel hose wall is thin, approximately 0.5mm, 3-5 times lighter than rubber tube, and difficult to bend into a "dead." Therefore, to be more widely used in petrochemical production. Corrugated stainless steel hose body after a period of time using (generally 1-4 years, the individual is less than 1 year), at the junction hose and pipe, the first rupture, causing media leaks, it is because the hose and flange lamination place, less flexible, because the hose wall is thin, operation, large range of activities, often close to the lamination of the hose to withstand maximum stress on the damaged hose physical testing is often able to identify the hose provide clues to the causes of damage.

The use of the gas valves

Overhaul thermocouple can be artificially heated, if the heat can generate electricity, coupled with the solenoid valve, the valve stem when heated press pull well, indicating skiving machine thermocouple intact. Put it back into the water heater, adjust the position of the thermocouple heat heating side of the case to ignite the fire. After the up, down, left, right, several adjustments, when it is in the outer flame metric thread oring face seal fittings fire and have enough heating area, the fire will normally reserved.
1 cut-off valve
According to install shut-off valves premises may be orientation during installation to stem hydraulic ferrule vertical as well. Medium flow direction of medium flow from the bottom of the valve disc valve
Top of the plate, according to media flow arrow on the valve body marked for installation.
2 Gate
In addition valve installed in the Japanese metric thread pipe condition, stem mounted vertically as possible. However, according to the spatial location of the cabin, hand wheel vertically downwards
Installation is also possible. Flow direction is no requirement, but should be considered after the installation instructions can switch easy to observe.
3 Check Valve
Lift check valves should be installed over the valve plate vertically. Swing check valves installed in horizontal pipe, valve disc is rotated upward when opened. Installed in vertical
Straight pipe, valve disc is located in the upper part of the seat. When installing medium flow direction of media flow valve shall be indicated by the arrow on the sign.
4 non-return valve
Closing check valve body should be medium flow arrow on the sign to be installed when you install to stem vertical as well.

Set fire gas valves water heater has two main functions

one is to use it to ignite the main burner; second is to use its uninterrupted heated thermocouple. Thermocouple is a heat can be converted into electrical energy components, installed next to the fire, the heat generated by its current control solenoid hydraulic cutting machine, open fire in the supply channel, so as to achieve the maintenance supply, continued to ignite the fire purposes. Water heaters used for a period of double hose connector time, prone to fire and flame failure can not be sustained. Its causes and treatment methods are as follows.
The gas fire unreasonable or can not maintain the channel conduction is the root cause of the fault.skiving machine If the thermocouple or the solenoid valve failure, fire or clogged nozzles will result in the supply passage barrier. When the thermocouple poor performance, even though it burned red, still no release after the fire when the ignition hand, can not hear the sound operation of the solenoid valve. In addition to external thermocouple failure, cracks or loose electrode leads are not likely to result in sustained ignition failure. If the hand release missing after the fire, but could hear the sound of the solenoid valve is released, it is clogged nozzle, then fire supply pipe can be removed with fine copper wire poke at the dirt can clog. If you have a fire after the hand release, but soon after automatically extinguished, it is caused by reason of the thermocouple. Can try to re-adjust the position of its best heat generally able to troubleshoot.

By end-use, the valve can be divided gas valves according to the different uses:

1 breaking with: to connect or disconnect the gas pipeline, such as the cut-off valve, gate valve, ball valve, butterfly valve. 2 ended reuse: to prevent the backflow of gases, such as check valves. 3 adjustment: adjust the gas pressure and flow, such as valves, valve. 4 assignment: to change the flow of the gas, gas distribution, such as the three-way cock, dispensing valve, spool valve. Fourth, according to the driving hydraulic cutting machine mode, depending on the driving mode can be divided into: 1 Manual: With hand wheels, handles, levers or sprockets, etc., there are human-driven, large transmission torque when fitted with worm reduction gear and gear motor 2: With motor or other electrical device driver. 3 air; driven by compressed air. Five, according to the pipe connection points, according to the valve and Interlock SAE Flange pipe connections can be divided; 1 Flanged valves: valve with flanges, valves and pipe with flanged connections. 2 threaded connection valve: Body with internal or external threads, threaded pipe connection using valves. 3 welded connection valve: body with welded joints, valves and pipe with welded connections. 4 clamp connection valve: the valve body with jaws, valves and pipe with clamp connections. 5 card sets connected to the valve: A valve sleeve and pipe connections

According valves gas valves and pipe connections can be divided

1 Flanged valves: valve with flanges, valves and pipe with flanged connections. 2 threaded connection valve: Body with internal or external threads, threaded pipe connection using valves. 3 welded connection valve: body with hydraulic ferrule welded joints, valves and pipe with welded connections. 4 clamp connection valve: the valve body with jaws, valves and pipe with clamp connections. 5 card sets connected to the valve: A valve sleeve and the pipe connections. Use Gas valves are widely used for a variety of city gas valves pipeline network system media pipeline gas, liquefied petroleum gas, natural gas and oxygen. Drive in the form of a manual, worm gear, double hose connector electric, pneumatic, hydraulic, electro-hydraulic actuator linkage, enabling remote control and automatic operation. According to the structure of the main types are: Plug valves, gate valve, globe valve, ball valve - used to turn on or off the gas flow pipe. Check valve (including bottom valve) - used to automatically prevent backflow of gas pipeline. Throttle - for regulating the flow of gas pipelines. Valve - used to automatically reduce the gas pressure inside the equipment and piping. Department of the gas valve through the gap, resulting in the loss of resistance to pressure to achieve the purpose of decompression.

According to the structure of the gas valve types are

Plug valves, gate valve, globe valve, ball valve - used to turn on or off the gas flow pipe. Check valve (including bottom valve) - used to automatically prevent backflow of gas pipeline. Throttle - for regulating the flow of gas pipelines. Valve - used to hydraulic hose manufacturers automatically reduce the gas pressure inside the equipment and piping. Department of the gas valve through the gap, resulting in the loss of resistance to pressure to achieve Reduction valve the purpose of decompression. By end-use, the valve can be divided according to the different uses: 1 breaking with: to connect or disconnect the gas pipeline, such as the cut-off valve, gate valve, ball valve, butterfly valve. 2 ended reuse: to prevent the backflow of gases, such as check valves. 3 adjustment: adjust the gas pressure and flow, such as valves, valve. 4 assignment: to change the flow of the gas, gas distribution, such as the three-way cock, dispensing valve, spool valve. Press the drive mode, depending on the driving mode can be divided into: 1 Manual: With hand wheels, handles, levers or sprockets, etc., there are human-driven, large transmission torque when fitted with reduction gear worm gear. 2 Electric: With motor or other electrical device driver. 3 air; driven by compressed air.

gas valves as well as the classification of the following methods:

By structural features, based off the seat relative to the direction of movement can be divided into: 1 door-shaped DKL fitting cut: off pieces move along the seat center. 2 gate shape: off pieces to move along the vertical seat center. 3 cock and ball: ball plunger or closure member is rotating around the center line itself. 4 Swing type: off pieces around the hydraulic hose ends outside of the valve shaft rotation. 5 dish: off pieces of the disc around the axis of rotation of the valve seat. 6 spool type: sliding closure member in a direction perpendicular to the channel.