1. Valves for petroleum installations ;  　　 1) Refining equipment, most of the valves used in refining equipment are pipeline valves, mainly gate valves, globe valves, check valves, safety valves, ball valves, butterfly valves, steam traps , among which the gate valve accounts for about 80% of the total number of valves . ( valves account for 3% to 5% of the total investment of the device );  　　 2) Chemical fiber equipment, chemical fiber products mainly include polyester, acrylic and vinylon. The ball valve and the jacket valve (the jacketed ball valve, the jacketed gate valve and the jacketed shut-off valve ) of the valve to be used ;  　　 3) Acrylonitrile device. The device generally needs to use the valve produced by the scale, mainly for the gate valve, the stop valve, the check valve, the ball valve, the steam trap, the needle-shaped stop valve, the plug valve, wherein the gate valve accounts for about 75% of the total valve ;  　　 4) Synthetic ammonia unit. Because the synthesis of ammonia and purification methods are different, the process flow is different, and the technical functions of the required valves are 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, high temperature and low temperature valves ;  　　 2. The application of valves for hydropower stations and the construction of power stations in China are developing in the direction of large-scale development. Therefore, large-diameter and high-pressure safety valves, pressure reducing valves, globe valves, gate valves, butterfly valves, emergency blocking valves, flow control valves, and spherical sealing instruments are required. Shut-off valve,   　　 3 , metallurgical application valves, metallurgical industry, alumina behavior mainly requires the use of wear-resistant slurry valve ( in the flow-type shut-off valve ) , adjust the trap. The steelmaking industry mainly needs metal sealed ball valves, butterfly valves and oxidized ball valves, cut-off flash and four-way reversing valves ;  　　 4 , the application of marine valves, followed by the development of offshore oilfield exploitation, the amount of valves required for marine flat hair is also gradually increasing. The offshore platform needs to use a shut-off ball valve, a check valve, and a multi-way valve ;  　　 5 , food and medicine application valves, the industry mainly needs to use stainless steel ball valves, non-toxic all plastic ball valves and butterfly valves. Among the above 10 types of large-scale valve products, the demand for general-purpose valves is relatively large, such as instrument valves, needle valves, needle-shaped globe valves, gate valves, globe valves, check valves, ball valves, butterfly valves ;  　　 6. Rural and urban construction application valves and urban construction departments generally use low-pressure valves, and are currently developing in the direction of environmental protection and energy conservation. Environmentally friendly rubber plate valves, balancing valves, and mid-line butterfly valves and metal-sealed butterfly valves are gradually replacing low-pressure iron gate valves. Most of the valves used in urban construction in the country are balance valves, soft seal gate valves, butterfly valves, etc .; 　　 7. In rural and urban heating valves and urban heat generation systems, a large number of metal sealing butterfly valves, horizontal balancing valves and direct-buried ball valves are needed. Because of this type of valve, the longitudinal and lateral hydraulic imbalance problems of the pipeline are solved to achieve energy saving and generation. The purpose of heat balance.  　　 8. In the environmental protection application valve and the domestic environmental protection system, the water supply system mainly needs the middle line butterfly valve, the soft sealing gate valve, the ball valve and the exhaust valve ( used to remove the air in the pipeline ) . Sewage treatment systems mainly need soft seal gate valves and butterfly valves ;  　　 9. Gas-operated valves and city gas account for 22% of the entire natural market . The valve usage is large and there are many types. Mainly need ball valve, plug valve, pressure reducing valve , safety valve ;  　　 10 , pipeline application valves, 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. infrared thermometer gun,infrared thermometer best,infrared thermometer gun for human body,ear thermometer:thermometer Shenzhen Urion Technology Co., Ltd. , https://www.urionhealth.com