The basic knowledge of pneumatic valves and functions

pneumatic valve control device is a fluid pipe, its basic function is to connect or cut off the pipeline medium circulation, change the circulation medium, change the flow direction of medium, adjust the pressure and flow of the medium, to protect the normal operation of the pipeline of the equipment. The application of pneumatic valves are used in industry after watt invented the steam engine, nearly two hundred and thirty years, because of the oil, chemical industry, power station, metallurgy, ship, nuclear energy, aerospace and so on, puts forward higher requirements for pneumatic valves, spurred the research and production parameters of pneumatic valve, its working temperature from ultra-low temperature ℃ ℃ to high temperature, and even up to ℃, pressure from ultra vacuum. x - Mpa( x - ㎜ Hg to the ultrahigh pressure MPa, pneumatic valve size from mm to mm, even to mm, pneumatic valve material from cast iron, carbon steel to titanium and titanium alloy, high strength and corrosion resistant steel, etc. , from manual to pneumatic valve gate drive way of electric, pneumatic, hydraulic, SPC, numerical control, remote control, etc. With the continuous development of modern industry, the growing demand for pneumatic valve, a modern petrochemical device requires tens of thousands of all kinds of pneumatic valves, pneumatic valves usage. Open and close frequently, but often due to manufacture, use selection, improper maintenance, run, run, drip, leak, the resulting fire, explosion, poisoning, scalding accidents, or cause the poor quality of the products, increase of energy consumption, equipment corrosion and material consumptions, environmental pollution, and even cause production accident, have become common, so people want to get high quality pneumatic valve, also calls for increased use of pneumatic valves, maintenance level, at this time of personnel engaged in pneumatic valve operation, maintenance personnel and engineering and technical personnel, put forward new requirements, in addition to elaborate design, reasonable choice of pneumatic valve operation, correct and timely maintenance, repair of pneumatic valves, pneumatic valves' run, take, drop, leakage 'and all kinds of accidents to a minimum.