There are more than 2300 valve manufacturers in the domestic market, which can provide several categories of valve products, more than 3500 varieties, more than 40000 specifications. The following to introduce the classification of valves!

Valves for urban construction:

Urban construction system generally uses low pressure valves, which is developing in the direction of environmental protection and energy saving. Environmentally friendly rubber plate valve, balance valve and middle line butterfly valve, metal seal butterfly valve is gradually replacing low pressure iron gate valve. Most of the valves used in domestic urban construction are balance valves, soft seal gate valves, butterfly valves, etc.

City heating valve:

Urban thermal system, a large number of metal hard seal butterfly valve, horizontal balance valve and directly buried ball valve, because this kind of valve to solve the pipeline longitudinal and horizontal hydraulic imbalance, to achieve the purpose of energy saving, heat balance generation.

Environmental protection valve:

In the domestic environmental protection system, the water supply system mainly needs the middle line butterfly valve, soft seal gate valve, ball valve, exhaust valve (used to exclude air in the pipeline). Sewage treatment system mainly needs soft seal gate valve, butterfly valve.

City gas valve:

City gas accounts for 22% of the whole natural market, the valve consumption is large, its type is also many. The main need ball valve, plug valve, pressure reducing valve, safety valve.

Long distance pipeline valves:

Long haul pipelines are mainly crude oil, finished products and natural pipelines. The most commonly used valves for this type of pipeline are forged steel three-piece full-diameter ball valves, sulfur-resistant flat gate valves, relief valves, and check valves.

Valves for petrochemical devices:

a. Oil refining equipment, most of the valves used in oil refining equipment are pipeline valves, mainly including gate valves, globe valves, check valves, safety valves, ball valves, butterfly valves, traps, among which, gate valves account for about 80% of the total number of valves (valves account for 3%~5% of the total investment in the equipment).

b, chemical fiber device, chemical fiber products mainly include polyester, acrylic, Vinylon three categories. The ball valve, jacket valve (jacket ball valve, jacket gate valve, jacket globe valve) of the valve required.

c, acrylic crystal device. The device generally requires api standard production of valves, mainly for gate valve, globe valve, check valve, ball valve, trap, needle valve, plug valve, of which, gate valve accounts for about 75% of the total valve.

d. Ammonia synthesis plant. Because the synthesis of ammonia and purification methods are different, its process is different, the technical performance of the required valve is different. At present, the domestic ammonia plant mainly needs gate valve, globe valve, check valve, trap, butterfly valve, ball valve, diaphragm valve, regulating valve, needle valve, safety valve, high temperature and low temperature valve. Among them, the globe valve accounted for 53.4% of the total number of valves used in the device, gate valve accounted for 25.1%, trap valve accounted for 7.7%, safety valve accounted for 2.4%, regulating valve and cold valve and other accounted for 11.4%.

e, ethylene device, ethylene device is the leading device of petrochemical industry, it needs a wide variety of valves. Gate valve, globe valve, check valve, lifting rod type ball valve account for the majority, among which gate valve should be the first. "Tenth Five-Year Plan", the country also needs to build an annual output of 660,000 tons of ethylene plant 6 sets, its valve demand is considerable. In addition, large ethylene and high pressure polyethylene devices also need to use ultra-high temperature, low temperature and ultra-high pressure valve series products.

f. Air separation device. "Air separation" is air separation, the device mainly needs to use the globe valve, safety valve, check valve, regulating valve, ball valve, butterfly valve, low temperature valve.

g, polypropylene device, polypropylene is easy to propylene as raw material, polymer compounds by polymerization, the device mainly needs gate valve, globe valve, check valve, needle valve, ball valve, trap valve.

Valve for power station:

The construction of power stations in China is developing in the direction of large-scale development, so large-caliber and high-pressure safety valves, pressure reducing valves, globe valves, gate valves, butterfly valves, emergency cut-off valves, flow control valves, and globe valves for spherical sealing instruments are required. (According to the national "Tenth Five-Year Plan", in addition to the two provinces of Inner Mongolia and Guizhou, more than 200,000 kW units can be built. Other provinces and cities can only build more than 300,000kw units).

Metallurgical valves:

Alumina behavior in the metallurgical industry mainly requires abrasive resistance slurry valve (in flow cut-off valve), regulating trap. The steel industry mainly needs metal sealed ball valves, butterfly valves and oxygen ball valves, globe valves and four-way reversing valves.

Sea level valves:

With the development of offshore oilfield exploitation, the number of valves used in offshore leveling is increasing gradually. Off ball valves, check valves and multiway valves are required for offshore platforms.

Valves for food and medicine:

The industry mainly needs stainless steel ball valve, all plastic ball valve and butterfly valve.