The valve is the control component in the fluid transportation system, which has the functions of cut-off, regulation, diversion, prevention of countercurrent, pressure stabilization, shunt overflow pressure relief. The valve used in fluid control system, the simplest stop valve to the most complex automatic control system, has a wide variety of varieties specifications. The valve can be used to control the flow of air, water, steam, various corrosive media, mud, oil, liquid metal radioactive medium.
Valve is in the fluid system, used to control the direction of fluid, pressure, flow device. The valve is a device that makes the medium (liquid, gas, powder) flow stop in piping equipment can control its flow. The valve is the control part in the pipeline fluid transportation system. It is used to change the channel section medium flow direction. It has the functions of diversion, cut-off, throttling, check, shunt overflow pressure relief. There are many kinds specifications of valves for fluid control, the simplest stop valve to the most complex automatic control system. The nominal diameter of the valve ranges very small instrument valve to industrial pipeline valve with diameter up to 10m. The valve can be used to control the flow of water, steam, oil, gas, mud, corrosive media, liquid metal radioactive fluid. The working pressure of the valve can be 0.0013mpa to 1000MPa, the working temperature is - 269 ℃ to 1430 ℃. The valve can be controlled by a variety of transmission modes, such as manual, electric, hydraulic, pneumatic, turbine, electromagnetic, electromagnetic, electro-hydraulic, pneumatic, spur gear, bevel gear drive, etc.; under the action of pressure, temperature other forms of sensing signals, it can act according to the predetermined requirements, simply open close without relying on the sensing signal. The valve relies on the drive The moving automatic mechanism makes the lifting, sliding, swinging rotating movement of the opening closing parts, so as to change the size of the flow passage area to realize its control function.