Introduce the function of self-locking valve of pneumatic control valve

Pneumatic control valve self-locking valve is a device to maintain valve position. When the air source fails, the pneumatic control valve can cut off the gas source signal, and keep the pressure signal of the diaphragm chamber or cylinder in the instantaneous state before the failure, so that the valve position can also be maintained in the position before the failure, thus playing a role of reserving position; when the pneumatic control valve is far away from the control room, the valve can be accurately understood without being in the field. The switch position should be equipped with a valve position conveyor, which converts the displacement of the valve opening mechanism into a signal to the control room according to certain rules. This signal can be a continuous signal reflecting any opening of the valve, or it can be regarded as the reverse action of the valve positioner.
Pneumatic control valve
The stroke switch reflects the two extreme positions of the pneumatic control valve switch and sends out the indication signal at the same time. According to this signal, the control room can betray the switching status of the valve in order to take corresponding measures. The air filter pressure relief valve is an accessory of industrial automation instrument, whose main function is to compress the air compressor. The air is filtered and purified, and the pressure is stabilized to the required value. It can be used in the air supply and pressure stabilization devices of various pneumatic instruments, solenoid valves, cylinders, spraying equipment and small pneumatic tools.

Pneumatic control valve pneumatic relay is a kind of power amplifier. It can send the pneumatic signal to a farther place and eliminate the lag caused by the lengthening of the signal pipeline. It is mainly used between the field transmitter and the regulator of the central control room, or between the regulator and the field pneumatic control valve. Another function is to release the pneumatic signal. Large or small signal.