Pneumatic butterfly valve is usually composed of pneumatic actuators and valves and with some accessories connected to the formation of the combination of debugging. This article describes the pneumatic butterfly valve on-site use of matters needing attention.

1, the control cabinet to send the signal valve does not move, the scene observed pneumatic adjustment butterfly valve in the installation of the locator under the premise of the installation of the solenoid valve, solenoid valve strong interference to the control cabinet signal output, the valve can not receive the signal, so Can not work normally.

Solution: Remove the solenoid valve, remove the strong electrical interference equipment normal operation (Note: The function of the solenoid valve is to play the role of valve switch, the role of the positioner is 4 to 20 mA signal control valve opening, There is no need to install the solenoid valve under the premise of the locator).

2, automatically switch to manual state after the switch does not return automatically; as the field operator to use the force too large clutch pull amplitude is too large cause the internal gear stuck, can not regain automatic.

Solution: When the clutch is pulled, the handwheel is to be rotated back and forth to disengage the internal turbo, so that the hand can be easily switched (it is necessary to pull up the yellow color card when the hand is automatically switched).

3, the valve is working properly, but the feedback has been in 100% state, through the field wiring staff to know, the scene of the line are thick lines, hardness is not very convenient connection, resulting in a screw drop, the wiring staff directly A long screw is tightened so that the module is screwed up to cause a short circuit.

Solution: with the conventional screw model; recommended to connect the line to use thin lines.