Application fields of several common valves

1. Valves used in petroleum equipment
① Refining equipment: Most of the valves required for refining equipment are pipeline valves, mainly gate valves, stop valves, check valves, safety valves, ball valves, butterfly valves, steam traps, among which 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 equipment).
② Chemical fiber equipment: Chemical fiber products mainly include three categories: polyester, acrylic, and vinylon. The valves required are ball valves and jacketed valves (jacketed ball valves, jacketed gate valves, jacketed stop valves). Acrylonitrile equipment: This equipment generally requires valves produced according to API standards, mainly gate valves, stop valves, check valves, ball valves, steam traps, needle valves, and plug valves. Among them, gate valves account for about 75% of the total number of valves.
③ Synthetic ammonia equipment: Due to the different synthetic ammonia sources and purification methods, the process flow is different, and the technical performance of the required valves is also different. At present, domestic synthetic ammonia plants mainly require gate valves, stop valves, check valves, steam traps, butterfly valves, ball valves, diaphragm valves, regulating valves, needle valves, safety valves, and high-temperature and low-temperature valves. Among them, stop valves account for 53.4% ​​of the total valve data of the plant, gate valves account for 25.1%, steam traps account for 7.7%, safety valves account for 2.4%, and regulating valves and low-temperature valves and others account for 11.4%.
④ Ethylene plant: Ethylene plant is the leading plant in petrochemical industry, and it requires a wide variety of valves. Gate valves, stop valves, check valves, and lifting stem ball valves account for the majority, among which gate valves are required to be the first. "In addition, large-scale ethylene and high-pressure polyethylene plants also require ultra-high temperature, ultra-low temperature and ultra-high pressure valve series products.
⑤ Air separation unit: "Air separation" means air separation. This unit mainly requires stop valves, safety valves, check valves, regulating valves, ball valves, butterfly valves, and low-temperature valves. ⑥ Polypropylene unit: Polypropylene is a polymer compound made of propylene as raw material. This unit mainly requires gate valves, stop valves, check valves, needle valves, ball valves, and steam traps.

2. Valves used in hydropower stations
① Shutoff valves: The main function is to connect or cut off the medium in the pipeline. It includes intermediate valves, stop valves, butterfly valves, ball valves, diaphragm valves, etc.
② Check valves: The main function is to prevent the medium in the pipeline from flowing back. Including check valves and bottom valves Valve.
③ Safety valve type: The main function is to prevent the medium pressure from exceeding the specified value and damaging the pipeline, and to provide overload protection, including various forms of safety valves and insurance valves.
④ Diverter valve type: Distribute, separate or mix the medium in the pipeline, including plug valves, diverter ball valves and steam traps. In hydropower stations, commonly used valves include inter-valve, stop valve, ball valve, butterfly valve, check valve, foot valve, pressure reducing valve, safety valve, etc. The main parameters for selecting valves are nominal pressure, nominal diameter, temperature range, drive mode, medium used and other conditions (such as material Quality or special purpose, etc.).

3. Metallurgical application valves
In the metallurgical industry, alumina behavior mainly requires wear-resistant slurry valves and regulating steam traps. The steelmaking industry mainly requires metal-sealed ball valves, butterfly valves and oxidation ball valves, stop valves and four-way reversing valves;

4. Marine application valves
With the development of offshore oil field exploitation, the amount of valves required for its offshore platforms is gradually increasing. Offshore platforms require shut-off ball valves, check valves, and multi-way valves;

5. Food and medicine application valves
This industry mainly uses stainless steel ball valves, non-toxic all-plastic ball valves and butterfly valves. The above 1 Among the 0 major categories of valve products, the demand for general valves is relatively large, such as instrument valves, needle valves, needle stop valves, gate valves, stop valves, check valves, ball valves, and butterfly valves;

6. Valves for urban construction applications
Urban construction systems generally use low-pressure valves, and are currently developing in the direction of environmental protection and energy saving. Environmentally friendly rubber plate valves, balancing valves, center line butterfly valves, and metal-sealed butterfly valves are gradually replacing low-pressure iron gate valves. Valves required for domestic urban construction are mostly balancing valves, soft-sealed gate valves, butterfly valves, etc.;

7. Environmentally friendly application valves
Water supply The system mainly needs centerline butterfly valve, soft-sealed gate valve, ball valve, exhaust valve (used to remove air from the pipeline). The sewage treatment system mainly needs soft-sealed gate valve and butterfly valve; 08 Gas valves
City gas accounts for 22% of the entire natural gas market, and the valve usage is large and its types are also many. Mainly need ball valves, plug valves, pressure reducing valves, safety valves; 09 Pipeline application valves
Long-distance pipelines are mainly crude oil, finished products and natural gas pipelines. The valves that are mostly used in this type of pipeline are forged steel three-piece full-diameter ball valves, sulfur-resistant flat gate valves, safety valves, and check valves.