A valve is a device used in a fluid system to control the direction, pressure, and flow of a fluid, a device that causes the medium (liquid, gas, powder) in the piping and equipment to flow or stop and to control its flow. Valve is the control part of pipeline fluid conveying system, which is used to change the path section and the flow direction of the medium, and has the functions of diversion, cutoff, throttling, stopping, shunt or overflow pressure discharge. Valves for fluid control, from the simplest globe valves to a wide range of valves used in extremely complex automatic control systems, have a wide variety and specifications, and the nominal diameter of valves range from tiny instrument valves to industrial piping valves with diameters up to 10m.
Can be used to control water, steam, oil, gas, mud, a variety of corrosive media, liquid metals and radioactive fluids and other types of fluid flow, the valve's operating pressure can be from 0.0013MPa to 1000MPa ultra-high pressure, operating temperature can be C-270℃ ultra-low temperature to 1430 ℃. Valve control can be used in a variety of transmission methods, such as manual, Electric, hydraulic, pneumatic, turbo, electromagnetic, electromagnetic fluid, electro-hydraulic, gas-liquid, positive gear, bevel gear drive, etc., can be under pressure, temperature or other forms of sensing signal, according to the action of the predetermined requirements, or do not rely
, the valve relies on the drive or automatic mechanism to make the opening and closing parts for lifting, sliding, spinning or rotary movement, thus changing the size of its runner area to achieve its control function.
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