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The main valves used in the industry
Jun 11, 2018

There are about more than 2300 valve manufacturers in China. There are several kinds of valve products, more than 3500 varieties and more than 40000 specifications.

The urban construction valve urban construction system generally adopts low pressure valves, and is developing towards environmental protection and energy saving. Environmental protection type rubber plate valve, balance valve, middle line butterfly valve and metal seal butterfly valve are gradually replacing low pressure iron gate valves. Domestic urban buildings need valves for balance valves, soft seal gate valves, butterfly valves and so on.

Urban heating valves:

In the urban heat generation system, a large number of metal sealing butterfly valves, horizontal balance valves and directly buried ball valves are needed to solve the longitudinal and lateral hydraulic imbalance of the pipe, so as to achieve the purpose of energy saving and heat balance.

Environmental protection valves:

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

Urban gas valve:

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.

Long distance pipeline with valve:

Long distance pipelines are mainly crude oil, finished products and natural pipelines. Most of the valves that are required for such pipelines are forged steel three body full diameter ball valves, sulfur resistant flat gate valves, safety valves and check valves.

Valves for petrochemical equipment:

A. refining unit. Most of the valves for oil refining equipment are pipe valves, mainly gate valves, cut-off valves, check valves, safety valves, ball valves, butterfly valves, trap valves, which account for about 80% of the total number of valves, (3% to 5% of the total investment in the valve).

B. chemical fiber device. 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. acrylic clear device. The device usually uses API standard valves, mainly gate valve, cut-off valve, check valve, ball valve, trap, needle type valve, cock valve, which account for about 75% of the total valve.

D. ammonia plant. Because the original ammonia and purification methods are different, its technological process is different, and the technical performance of the valves required is also different. At present, domestic ammonia plant mainly use gate valve, cut-off valve, check valve, trap, butterfly valve, ball valve, diaphragm valve, regulating valve, needle type valve, safety valve, high temperature and low temperature valve. Among them, the cut-off valve accounts for 53.4% of the total data of the valve, 25.1% of the gate valves, 7.7% of the trap valves, 2.4% of the safety valves, and 11.4% of the regulating valves and the other low temperature valves and others.

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. "Fifteen" plan, the country needs to build an annual output of 660 thousand tons of ethylene plant 6 sets, and its valve demand is considerable. In addition, large ethylene and high pressure polyethylene units also require ultra high temperature, low temperature and ultra high pressure valve series products.

F. air separation unit. Air separation is air separation. The device mainly needs cut-off valve, safety valve, check valve, regulating valve, ball valve, butterfly valve and cryogenic valve.

G. polypropylene device. Polypropylene is easy to use propylene as the raw material and polymerized polymer. The device mainly uses gate valve, cut-off valve, check valve, needle type valve, ball valve and trap.

Power station valve:

The construction of power stations in China is developing towards large scale, so it is necessary to use large caliber and high pressure safety valves, pressure relief valves, cut-off valves, gate valves, butterfly valves, emergency shutoff valves and flow control valves, spherical seal instrument cut-off valves. (according to the national "fifteen" plan, the two provinces in Inner Mongolia and Guizhou can also be built more than 200 thousand kilowatts. Other provinces and cities can only build more than 300 thousand kilowatts.

Metallurgical valves:

The behavior of alumina in metallurgical industry mainly needs wear-resistant slurry valve (flow stop valve) and regulating steam trap. 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 valve:

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.

Food and medicine valves:

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