Urban gas valves: Urban gas accounts for 22% of the entire natural gas market, with a large amount of valves and many types. We mainly need ball valves, plug valves, pressure reducing valves, and safety valves.

城市供热用阀门：城市代热系统中，需用大量的金属密封蝶阀、水平平衡阀及直埋式球阀、因这类阀管道纵向、横向水力失调问题，达到、代热平衡的目的。

Valves for urban heating: In urban heat generation systems, a large number of metal sealed butterfly valves, horizontal balance valves, and directly buried ball valves are required to solve the problem of longitudinal and transverse hydraulic imbalance in pipelines, achieving the goal of energy conservation and heat generation balance.

城市建筑用阀门：城建系统一般采用低压阀门，目前正向型和型方向发展。型的胶板阀、平衡阀及中线蝶阀、金属密封蝶阀正在逐渐取代低压铁制闸阀。国内城市建筑需用阀门多为平衡阀、软密封闸阀、蝶阀等。

Valves for urban construction: Urban construction systems generally use low-pressure valves and are currently developing towards environmentally friendly and energy-saving directions. Environmentally friendly rubber plate valves, balance valves, centerline butterfly valves, and metal sealed butterfly valves are gradually replacing low-pressure iron gate valves. The valves required for urban construction in China are mostly balance valves, soft sealing gate valves, butterfly valves, etc.

用阀门：国内系统中，给水系统主要需用中线蝶阀、软密封闸阀、球阀、排气阀（用于排除管道中的空气）。污水处理系统主要需用软密封闸阀、蝶阀。

Environmental protection valves: In domestic environmental protection systems, the water supply system mainly requires the use of centerline butterfly valves, soft sealing gate valves, ball valves, and exhaust valves (used to remove air from pipelines). The sewage treatment system mainly requires soft sealing gate valves and butterfly valves.

长输管线用阀门：长输管线主要为原油、成品没及天然管线。这类管线需用量居多的阀门是锻钢三体式全通径球阀、抗硫平板闸阀，阀，止回阀，针型阀。

Valves for long-distance pipelines: long-distance pipelines mainly include crude oil, finished oil, and natural pipelines. The valves that require the majority of this type of pipeline are forged steel three body full bore ball valves, sulfur resistant flat gate valves, safety valves, check valves, and needle valves.

石化装置用阀门： a,炼油装置，炼油装置需用的阀门大多是管道阀门，主要为闸阀、截止阀、止回阀、阀、球阀、蝶阀。 b,化纤装置，化纤产品主要有涤纶、晴纶、维纶三大类。其需用的阀门的球阀、夹套阀(夹套球阀、夹套闸阀、夹套截止阀)。 c,丙烯晴装置。该装置一般需用api标准生产的阀门，主要为闸阀、截止阀、止回阀、球阀、疏水阀。 d,合成氨装置。由于合成氨原和净化方法不同，其工艺流程不同，所需阀门的技术性能也不同。目前，国内合成氨装置主要需用闸阀、截止阀、止回阀、调节阀。 e,乙烯装置，乙烯装置是石油化工的龙头装置，其需用闸阀等。

Valves used in petrochemical plants: a. Most of the valves used in refining plants are pipeline valves, mainly gate valves, globe valves, check valves, safety valves, ball valves, and butterfly valves. b. Chemical fiber equipment, chemical fiber products mainly include three categories: polyester, acrylic, and vinylon. The ball valve and jacketed valve (jacketed ball valve, jacketed gate valve, and jacketed globe valve) required for the valve. c. Acrylonitrile unit. This device generally requires valves produced according to API standards, mainly including gate valves, globe valves, check valves, ball valves, and drain valves. d. Synthetic ammonia plant. Due to different synthetic ammonia raw materials and purification methods, the process flow and technical performance of the required valves are also different. At present, domestic synthetic ammonia plants mainly require gate valves, globe valves, check valves, and control valves. e. Ethylene plant is a leading device in petrochemical industry, which requires the use of gate valves, etc.

电站用阀门：我国电站的建设正向大型化方向发展，所以需用大口径及高压的阀、减压阀、截止阀、闸阀、蝶阀、紧急切断阀及流量控制阀。

Valves for power plants: The construction of power plants in China is developing towards large-scale development, so large-diameter and high-pressure safety valves, pressure reducing valves, globe valves, gate valves, butterfly valves, emergency shut-off valves, and flow control valves are needed.

冶金用阀门：冶金行业中氧化铝行为主要需用耐磨料浆阀(在流式截止阀)、调节疏水阀。炼钢行业主要需用金属密封球阀、蝶阀及氧化球阀、截止阀和四通换向阀。

Metallurgical valves: In the metallurgical industry, wear-resistant slurry valves (in flow stop valves) and regulating drain valves are mainly required for aluminum oxide behavior. The steelmaking industry mainly requires metal sealed ball valves, butterfly valves, oxidation ball valves, globe valves, and four-way directional valves.

海洋平台用阀门：随着海上油田开采的发展，其海洋平台需用关断球阀、止回阀、多路阀等。

Valves for offshore platforms: With the development of offshore oil field exploitation, offshore platforms need to use shut-off ball valves, check valves, multi way valves, etc.