Electric pneumatic valve leakage cause analysis and solution

Electropneumatic valve can sometimes appear within the leak, it said leakage in the following several reasons and their general solutions.




a, electric pneumatic valve actuator zero set is not accurate, not reached the seated position of pneumatic valve. Adjust way:

1 closing the pneumatic valve, manual ( Must be confirmed completely shut down) ；

2, reoccupy force close the pneumatic valve manually, but use a strength twist fixed shall prevail;

3, turn back again, Pneumatic valve direction) Half a circle;

4, then adjust the limit.

2, electropneumatic valve travel mode choice:

the pneumatic valve is rotated 90 ° open closed form, the actuator torque force is not big enough, in the absence of pressure debugging can easily achieve a fitted, and a rotating force, cannot overcome the thrust of fluid drive, so does not reach the designated position.

solution: replace the big thrust actuator, or change to balance type pneumatic valve core to reduce the unbalanced force of medium.


3, electropneumatic valve leakage caused by the manufacturing quality of

in the process of the pneumatic valve manufacturers in the production of pneumatic valve materials, processing technology and assembly process control is lax, the sealing surface grinding is unqualified, the pitting, products are not completely eliminate defects such as trachoma, caused the electric forged steel pneumatic valve leakage.

solution: reprocessed seal face.


4, electric pneumatic valve control part pneumatic valve leakage:

electropneumatic valve of the traditional control method is through the pneumatic valve machinery, limit switch, a torque switch control mode, because the control element is affected by environmental temperature, pressure, humidity, causing pneumatic valve positioning, spring fatigue, thermal expansion coefficient of inhomogeneous objective factors, such as electric pneumatic valve leakage of forged steel. Solution: adjust the limit again.