Control valve structural features

From a structural perspective, the following features of the control valve.
1 control valve has a variety of different types, them applies different occasions, therefore, should be a reasonable choice in accordance with the requirements of the production process technology control valve type.
2 control valve gas off two types of open air. Open air control valve is closed when the fault condition, the gas off control valve is open when the fault condition. Can be self-locking of the composition of the auxiliary equipment lock-up valve or control valve, control valve failure to keep the valve opening before the failure.air cylinder manufacturers
3 open air gas off by a positive reaction type of actuator and body composition to achieve the anti-body valve, the positioner can also be achieve through the valve positioner.
Various control valve structure is different, have their own characteristics.pilot valves