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.