The advantages and disadvantages of pneumatic valves and electric valve
- - - - - - - - - - - - : in the moment than electric valve, pneumatic valve action of pneumatic valve switching speed can be adjusted, simple structure, easy maintenance, action for buffer characteristics of the gas itself in the process, not easy to damage by sticking, gas source, and its control system is more complicated than the electric valve. Pneumatic valve response is sensitive, safe and reliable, many factory of high control requirements for pneumatic instrumentation control components set the compressed air station. Electric is to electricity. The role of the pneumatic valve positioner is accept pneumatic regulator output signal, and then produce and regulator output signal is proportional to the pressure signal, to control the pneumatic control valve. A wide variety of pneumatic valve positioner, according to its working principle can be divided into balance type displacement and force ( Moment) Balance type two kinds big.