Common occasions for various valves:

Detailed description of valve types in China Valves can be divided into 10 categories according to different industry needs, with more than 3,500 varieties and more than 40,000 specifications. There are more than 2,300 manufacturers of valves in China.

Detailed description of valve product types:

1. City gas valves: City gas accounts for 22% of the entire natural gas market, and the valve usage is large, and there are many types. Ball valves, plug valves, pressure reducing valves, and safety valves are mainly required.

2. Urban heating valve: In the urban heat generation system, a large number of metal sealing butterfly valves, horizontal balancing valves and direct buried ball valves are needed. Because of these valves, the longitudinal and lateral hydraulic imbalance of the pipeline can be solved to achieve energy saving and heat balance. purpose.

3. Valves for urban construction: Urban construction systems generally use low-pressure valves and are currently developing in an environmentally friendly and energy-saving manner. Environmentally friendly rubber plate valves, balancing valves, mid-line butterfly valves, and metal-sealed butterfly valves are gradually replacing low-pressure iron gate valves. The valves used in domestic urban construction are mostly balance valves, soft seal gate valves, butterfly valves, etc.

4. Environmental protection valve: 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 (used to remove the air in the pipeline). Sewage treatment systems mainly require soft sealing gate valves and butterfly valves.

5. Valves for long-distance pipelines: Long-distance pipelines are mainly crude oil, finished products and natural pipelines. The valves that require a large amount of such pipelines are forged steel three-piece full-bore ball valves, sulfur-resistant slab gate valves, safety valves, and check valves.

6. Valves for petrochemical plants: a, oil refining devices, valves used in refining devices are mostly pipeline valves, mainly gate valves, globe valves, check valves, safety valves, ball valves, butterfly valves, steam traps, among which, gate valve demand accounts for About 80% of the total number of valves, (valves account for 3% to 5% of the total investment of the device). b. Chemical fiber equipment, chemical fiber products mainly include polyester, acrylic and vinylon. Ball valve and jacketed valve (jacketed ball valve, jacketed gate valve, jacketed shut-off valve) for the valve to be used. c, acrylonitrile device. The device generally needs to use the api standard production valve, mainly for gate valve, globe valve, check valve, ball valve, steam trap, needle valve, plug valve, wherein the gate valve accounts for about 75% of the total valve. d, ammonia plant. Due to the different synthetic ammonia and purification methods, the process flow is different, and the technical performance of the required valves 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, and high temperature cryogenic valves. Among them, the stop valve accounts for 53.4% of the total valve data of the device, the gate valve accounts for 25.1%, the trap accounts for 7.7%, the safety valve accounts for 2.4%, the regulating valve and the cryogenic valve and other 11.4%.e, ethylene device, ethylene device It is a leading faucet for petrochemical industry, which requires a wide variety of valves. Gate valves, globe valves, check valves, and lift-rod ball valves account for the majority, with gate valves needing to take the lead. In the "10th Five-Year Plan", there are still 6 sets of ethylene plants with an annual output of 660,000 tons, and the demand for valves is considerable. In addition, large-scale ethylene and high-pressure polyethylene equipment also requires ultra-high temperature, lower temperature and ultra-high pressure valve series. f, air separation device. "Air separation" means air separation. The device mainly requires a shut-off valve, a safety valve, a check valve, a regulating valve, a ball valve, a butterfly valve, and a cryogenic valve. g, polypropylene device, polypropylene is easy to use propylene as raw material, polymerized polymer compound, the device mainly needs gate valve, globe valve, check valve, needle valve, ball valve, trap.

7. Valves for power stations: The construction of power stations in China is developing in a large-scale direction. Therefore, large-diameter and high-pressure safety valves, pressure reducing valves, globe valves, gate valves, butterfly valves, emergency shut-off valves, flow control valves, and spherical seal instruments are required. Globe valve, (According to the national “Tenth Five-Year Plan”, except for Inner Mongolia and Guizhou provinces, it is also possible to build more than 200,000 kilowatts. Other provinces and cities can only build more than 300,000 kilowatts.)

8. Valves for metallurgy: The behavior of alumina in the metallurgical industry mainly requires the use of wear-resistant slurry valves (in the flow-type shut-off valve) and the adjustment of traps. Metal-sealed ball valves, butterfly valves and oxidized ball valves, globe valves and four-way reversing valves are mainly used in the steelmaking industry.

9. Marine flat valve: With the development of offshore oilfield exploitation, the amount of valves required for marine flat hair is gradually increasing. The offshore platform needs to use a shut-off ball valve, a check valve, and a multi-way valve.

10. Valves for food and medicine: The industry mainly needs stainless steel ball valves, non-toxic all-plastic ball valves and butterfly valves. Among the above 10 types of valve products, the demand for general-purpose valves is much higher, such as instrument valves, needle valves, gate valves, globe valves, check valves, ball valves, and butterfly valves.