How many kinds of valves are the most popular in C

How many kinds of valves are there in China?

there are three valve manufacturers in China with about 2300 valves. There are several categories of valve products that can be provided, more than 3500 varieties and more than 40000 specifications

(5. Guide post deformation compensation algorithm 1) valves for urban construction: urban construction systems generally use low-pressure valves, which are currently developing in the direction of environmental protection and energy conservation. Environmental friendly rubber plate valves, balance valves, center line butterfly valves and metal seal butterfly valves are gradually replacing low-pressure iron gate valves. The valves required by domestic urban buildings are mostly balance valves, soft seal gate valves, butterfly valves, etc

(2) valves for urban heat supply: in the urban heat generation system, a large number of metal sealing butterfly Altair are needed to expand the leading position in the field of composite simulation, horizontal balance valve and directly buried ball valve. Because these valves solve the problem of vertical and horizontal hydraulic imbalance of pipelines, they achieve the purpose of energy saving and heat generation balance

(3) valves for environmental protection: in the domestic environmental protection system, the water supply system mainly needs the center line butterfly valve, soft seal gate valve, ball valve and exhaust valve (used to remove the air in the pipeline). The metal rubber at the sewage is a kind of structural material. The management system mainly needs soft sealing gate valve and butterfly valve

(4) valves for urban gas: urban gas accounts for 22% of the whole natural market, with large consumption and many types of valves. It mainly needs ball valve, plug valve, pressure reducing valve and safety valve

(5) valves for long-distance pipelines: long-distance pipelines are mainly crude oil, finished products and natural pipelines. The valves with most demand for this kind of pipeline are forged steel three body full bore ball valve, sulfur resistant flat gate valve, safety valve and check valve

(6) valves for petrochemical units: A. most of the valves required by oil refining units are pipeline valves, mainly gate valves, globe valves, check valves, safety valves, ball valves, butterfly valves, and steam traps. Among them, the demand for gate valves accounts for about 80% of the total number of valves (valves account for 3% to 5% of the total investment of the installation). b. Chemical fiber devices and chemical fiber products mainly include polyester, acrylic and vinylon. The ball valve and jacketed valve (jacketed ball valve, jacketed gate valve and jacketed stop valve) of the valves they need. c. Acrylonitrile unit. The device generally requires valves produced in API standard, mainly gate valves, globe valves, check valves, ball valves, traps, needle valves, plug valves, among which gate valves account for about 75% of the total valves. d. Ammonia plant. Because synthetic ammonia and purification methods are different, their process flows are different, and the technical functions of the required valves are also different. At present, domestic synthetic ammonia plants mainly need gate valves, globe valves, check valves, steam traps, butterfly valves, ball valves, diaphragm valves, regulating valves, needle valves, safety valves, high and low temperature valves

among them, the stop valve accounts for 53.4% of the total data of valves used in the device, the gate valve accounts for 25.1%, the drain valve accounts for 7.7%, the safety valve accounts for 2.4%, and the regulating valve, low temperature valve and others account for 11.4% e. Ethylene device is the leading device in petrochemical industry, which requires a wide variety of valves

gate valves, globe valves, check valves and lift rod ball valves account for the majority, of which gate valves need to take the lead. According to the tenth five year plan, six sets of ethylene plants with an annual output of 660000 tons need to be built nationwide, and the demand for valves is considerable. In addition, large ethylene and high-pressure polyethylene plants also need ultra-high temperature, lower temperature and ultra-high pressure valve series products. f. Air separation unit. "Air separation" refers to air separation. The device mainly needs stop valve, safety valve, check valve, regulating valve, ball valve, butterfly valve and cryogenic valve. g. Polypropylene device. Polypropylene is a high molecular compound polymerized with propylene as raw material. This device mainly needs gate valves, globe valves, check valves, needle valves, ball valves and steam traps for brush head clamps

(7) valves for power stations: the construction of power stations in China is developing in the direction of large-scale, so large-diameter and high-pressure safety valves, pressure reducing valves, stop valves, gate valves, butterfly valves, emergency block valves and flow control valves, spherical sealing instrument stop valves are needed (according to the national "Tenth Five Year Plan", in addition to Inner Mongolia and Guizhou provinces, units of more than 200000 kW can be built, while other provinces and cities can only build units of more than 300000 kW)

(8) valves for Metallurgy: in the metallurgical industry, the behavior of alumina mainly requires wear-resistant slurry valve (in flow stop valve) and regulating drain valve. Steel industry mainly needs metal sealed ball valve, butterfly valve and oxidation ball valve, stop flash valve and four-way directional valve

(9) marine valves: with the development of offshore oil field exploitation, the amount of valves required for marine valves is also gradually increasing. Offshore platforms need shut-off ball valves, check valves and multi-way valves