Classification and characteristics of pneumatic valve is what?

Classification: according to different process equipment can choose pneumatic or electric actuators, respectively of pneumatic valve and electric valve, pneumatic valve such as must be regulated to achieve proportional valve positioner, such as the electric valve must be regulated to achieve proportional election electronic electric actuators or servo amplifier, etc. Features: from the material, can be divided into: carbon steel valves, stainless steel valves, valve and copper valve according to the pressure, can be divided into: high pressure and low pressure valves and pressure pneumatic valve: mainly used in oil, gas, hydraulic oil, engineering machinery industry such as low pressure pneumatic valve: mainly used in corrosion medium such as water pipe on the road!