Types of valves used by industries

There are more than 2300 valve manufacturers in China, which can provide several types of valve products, more than 3500 varieties, more than 40,000 specifications.

Low-pressure valves are generally used in urban construction system of valves for urban construction. At present, they are developing toward environmental protection and energy-saving. Environmental-friendly rubber valve, balance valve and midline butterfly valve, metal seal butterfly valve is gradually replacing low-pressure iron gate valve. Domestic urban buildings need valves for balance valves, soft seal gate valves, butterfly valves and so on.

Valves for urban heating

A large number of metal sealed butterfly valves, horizontal balancing valves and direct-buried ball valves are needed in urban heat substitution systems. Because of these valves, the problems of longitudinal and transverse hydraulic imbalance in pipelines are solved, so as to save energy and replace heat balance.

Environmental protection valves

In the domestic environmental protection system, the feedwater system mainly needs the midline butterfly valve, the soft seal gate valve, the ball valve, the exhaust valve (for removing the air in the pipeline). The sewage treatment system mainly needs soft seal gate valves and butterfly valves.

Valves for city gas

City gas accounts for 22% of the whole natural market, and the number of valves is large. It mainly needs ball valve, plug valve, pressure reducing valve and safety valve.

Valves for long distance pipeline

Long distance pipelines are mainly crude oil, finished products and natural pipelines. The valves used in most of these pipelines are forged steel three-body full-bore ball valve, sulfur-resistant flat gate valve, safety valve, check valve.

Valves for petrochemical plants

A. refining unit. Most of the valves used in oil refining units are pipeline valves, mainly gate valves, globe valves, check valves, safety valves, ball valves, butterfly valves, traps, in which the demand for gate valves accounts for about 80% of the total number of valves (valves account for 3% - 5% of the total investment in the unit).

B. chemical fibre plant. Chemical fiber products are mainly polyester, acrylic, vinylon three categories. The required ball valves and jacket valves (jacket ball valves, jacketed gate valves and jacketed stop valves) are required.

C. acrylonitrile plant. The device generally needs API standard production of valves, mainly for gate valves, globe valves, check valves, ball valves, traps, needle valves, plug valves, which account for about 75% of the total valve.

D. ammonia plant. Due to the difference of synthetic ammonia and purification methods, the process flow is different, and the technical performance of the valve is also different. At present, domestic ammonia plants mainly need gate valves, globe valves, check valves, traps, butterfly valves, ball valves, diaphragm valves, regulating valves, needle valves, safety valves, high temperature and low temperature valves. Among them, globe valves accounted for 53.4% of the total data of the valve, gate valves accounted for 25.1%, traps accounted for 7.7%, safety valves accounted for 2.4%, control valves and cryogenic valves accounted for 11.4%.

E. ethylene plant. Ethylene plant is the leading device of petrochemical industry, which requires a wide variety of valves. Gate valves, globe valves, check valves and lifting lever ball valves account for the majority, of which the gate valve should be the first. In the Tenth Five-Year Plan, six ethylene plants with an annual output of 660,000 tons need to be built nationwide, and the demand for valves is considerable. In addition, large-scale ethylene and high-pressure polyethylene units also need to use ultra-high temperature, lower temperature and ultra-high pressure valve series products.

F. air separation unit. Air separation means air separation. The device mainly uses globe valves, safety valves, check valves, regulating valves, ball valves, butterfly valves and cryogenic valves.

G. polypropylene plant. Polypropylene (PP) is a kind of polymer which is made from propylene by polymerization. The device mainly uses gate valve, globe valve, check valve, needle valve, ball valve and trap valve.

Valves for power station

The construction of power stations in China is developing towards large-scale, so large-caliber and high-pressure relief valves, pressure reducing valves, globe valves, gate valves, butterfly valves, emergency shutoff valves and flow control valves, spherical sealing instrument globe valves are needed. (According to the National Tenth Five-Year Plan, in addition to Inner Mongolia and Guizhou, more than 200,000 kilowatt units can be built.) Other provinces and cities can only build more than 300 thousand kilowatts.

Metallurgical valves

Alumina behavior in metallurgical industry mainly needs wear-resistant slurry valve (in flow globe valve) and regulating trap valve. The steel industry mainly needs metal sealed ball valve, butterfly valve and oxidation ball valve, cut-off flash and four way reversing valve.

Marine flat valves

With the development of offshore oil exploitation, the number of valves needed for offshore development is also increasing. Offshore platforms need to turn off ball valves, check valves and multiway valves.

Valves for food and medicine

The industry mainly uses stainless steel ball valves, non-toxic all plastic ball valves and butterfly valves.