Valve

The Check valve is in fluid system, a device used to control the direction of the fluid flow, pressure, is to make the piping and equipment within the media (liquid, gas, powder) device for controlling the flow of energy flow or stop and the.
The Instrument valves is a pipeline control unit of fluid delivery system, which is used to change the channel section and flow direction of medium, with diversion, cut-off, throttling, check, diversion or overflow relief functions. For fluid control valves, valve from the simple to the extremely different kinds of valve control system used in complex, its many varieties and specifications, the valve nominal diameter pipeline industry from large to tiny instrument valve diameter up to 10m valve. Can be used for the control of water, steam, oil, gas, mud, all kinds of corrosive medium, the liquid metal and radioactive fluids and other types of fluid flow, the valve working pressure is from 0.0013MPa to 1000MPa of ultra high pressure, working temperature from ultra low temperature to high temperature of 1430 DEG C -270 C.
The control valve can use a variety of transmission, such as manual, electric, hydraulic, pneumatic, pneumatic turbine, electromagnetic, electromagnetic hydraulic, electric hydraulic, pneumatic and hydraulic, gear, bevel gear drive; in pressure, temperature or other forms of sensor signals under the action, according to the requirements, or not depends on the sensing signal and a simple open or closed, the valve to rely on drive or automatic mechanism to make the opening and closing parts for lifting, sliding, rotating or turning motion, so as to change the size of the flow area to achieve the control function.