The basic function of the valve is cut off, adjust, diversion, prevent backflow, regulator, shunt or overflow relief.

Valve (famen) is a fluid control system in the control unit, with cut-off, regulation, diversion, to prevent backflow, regulator, shunt or overflow pressure and other functions.

Valves for fluid control systems, ranging from the simplest shut-off valves to a variety of valves used in extremely complex automatic control systems, with a wide variety of specifications and specifications. Valves can be used to control the flow of various types of fluids such as air, water, steam, corrosive media, mud, oil, liquid metal and radioactive media. 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, duplex steel valves, plastic valves, non-standard custom valves The

Definition: is in the fluid system, used to control the direction of the fluid, pressure, flow device. A valve is a device that allows piping and equipment (liquids, gases, powders) to flow or stop and control its flow. Valves can be used to control the flow of various types of fluids such as air, water, steam, corrosive media, mud, oil, liquid metal and radioactive media. The valve is the control part of the pipeline fluid conveying system, which is used to change the channel cross section and the medium flow direction, has the function of diversion, cut-off, throttling, stop, shunt or overflow relief. Valves for fluid control, from the simplest cut-off valve to the extremely complex automatic control system used in a variety of valves, its variety and specifications, the nominal diameter of the valve from a very small instrument valve to a diameter of 10m Industrial piping valves. The valve can be used to control the flow of various types of fluids such as water, steam, oil, gas, mud, various corrosive media, liquid metal and radioactive fluid. The working pressure of the valve can be from 0.0013MPa to 1000MPa, From -269 ℃ ultra-low temperature to 1430 ℃ high temperature. Valve control can be used in a variety of transmission methods, such as manual, electric, hydraulic, pneumatic, turbine, electromagnetic, electromagnetic hydraulic, electro-hydraulic, gas-liquid, spur gear, bevel gear drive; Or other forms of sensor signals, according to the intended requirements of action, or do not rely on the sensor signal for a simple open or closed, the valve by the drive or automatic mechanism to make the opening and closing parts for lifting, sliding, swing or turn Movement, thereby changing the size of its flow area to achieve its control function.