The history and definition of pneumatic valve

the pneumatic valve is produced along with the fluid pipeline. In ancient China vacuum salt brine from the brine well, the had used a cork in the bamboo pipe pneumatic valve. The application of industrial pneumatic valves, starts from the watt invented the steam engine later. Appeared in the early 20th century cast steel, forged steel and forge welding structure of the pneumatic valve.
'pneumatic valve' is defined in the fluid system, used to control the direction, pressure and flow of the fluid 臵. Pneumatic valve is to make the piping and equipment within the medium ( Liquid, gas, powder) Flow or stop and can control the flow of 臵.
the pneumatic valve is control unit in the pipeline fluid conveying system, it is used to change the channel cross-section and flow direction of medium, a diversion, globe, adjust, throttle, check, or the overflow pressure relief, and other functions.
used for flow control of pneumatic valves, pneumatic valve from the simplest deadline to extremely complex control system used in all kinds of pneumatic valves, its breed and specification is various, pneumatic valve nominal diameter instrument pneumatic valve from very small to size m industrial piping with pneumatic valve.
pneumatic valve can be used to control water, steam, oil, gas, mud, all kinds of corrosive medium, liquid metal and radioactive fluids such as various types of fluid flow, working pressure pneumatic valves are available from. MPa to MPa ultra-high pressure, the working temperature ℃ ultra-low temperature to ℃ high temperature. Pneumatic control valve can be used a variety of transmission way, such as manual, electric, hydraulic, pneumatic, worm gear, electromagnetic actuator, electromagnetic, hydraulic, electric, hydraulic, pneumatic, hydraulic, spur gear, bevel gear drive, etc. ; In pressure, temperature or other form under the action of sensor signals, action, according to the requirement of the reservation or not depend on the sensor signals for simple open or shut down, rely on the drive or automatic pneumatic valve institutions make open-close part for lifting, sliding, rotary pendulum or rotary movement, so as to change the size of the port in order to realize the control function.