The valve is a pipeline accessory used to open and close the pipeline, control the flow direction, adjust and control the parameters (temperature, pressure and flow) of the transmission medium. According to its functions, it can be divided into shut-off valve, check valve, regulating valve, etc.

The valve is a control component in the fluid delivery system, which has the functions of cut-off, regulation, diversion, prevention of countercurrent, pressure stabilization, diversion or overflow pressure relief. Valves used in fluid control systems range from the simplest globe valves to various valves used in extremely complex automatic control systems.

The valve can be used to control the flow of various fluids such as air, water, steam, various corrosive media, mud, oil, liquid metal and radioactive media. The valves are also divided into cast iron valves, cast steel valves, stainless steel valves (201, 304, 316, etc.), chrome molybdenum steel valves, chrome molybdenum vanadium steel valves, dual phase steel valves, plastic valves, non-standard valves, etc.

The valve is a device used to control the direction, pressure and flow of the fluid in the fluid system. It is a device that allows the medium (liquid, gas, powder) in the piping and equipment to flow or stop and can control its flow.

The valve is a control component in the pipeline fluid transportation system, which is used to change the channel section and medium flow direction, and has the functions of diversion, cut-off, throttling, check, diversion or overflow relief. The valves used for fluid control range from the simplest globe valves to various valves used in extremely complex automatic control systems, with a wide range of varieties and specifications. The nominal diameter of the valves ranges from very small instrument valves to industrial pipeline valves with a diameter of 10m. It can be used to control the flow of water, steam, oil, gas, mud, various corrosive media, liquid metal, radioactive fluid and other types of fluids. The working pressure of the valve can be from 0.0013MPa to 1000MPa with ultra-high pressure, and the working temperature can be from c-270 ℃ to 1430 ℃ with ultra-low temperature.

The valve can be controlled by various transmission modes, such as manual, electric, hydraulic, pneumatic, turbine, electromagnetic, electromagnetic hydraulic, electro-hydraulic, pneumatic, spur gear, bevel gear, etc; Under the action of pressure, temperature or other forms of sensing signals, it can act according to the predetermined requirements, or it can simply open or close without relying on the sensing signals. The valve can lift, slide, swing or rotate the opening and closing parts depending on the drive or automatic mechanism, so as to change the size of its flow channel area to achieve its control function.