The difference between manual valve and control valve

The principle of control valves wiring diagram _ control valve _ manual valves: manual valve using the handwheel, handle, lever, sprocket, du control valve by human action. When large starting torque closed valve can be set up between the wheel and stem this round or worm gear reducer. When necessary, also can make use of universal joint and drive shaft to operate at a distance. Control valve is not need to drive force, but rely on the media's own energy to make the valve action of the valve. Such as safety valve, relief valve, steam trap, check valve, automatic valve, etc. Mainly operating mode is different, have special pneumatic control pneumatic valve mouth K, have spirit action when the input signal. The manual valve is easy to understand, hand play, want to home gas lamp switch. How to choose, be about to see you need the design of the pneumatic system. In addition to air control valve and so on different control mode.