SMC Networks XGTP 312-50336-1CN, Operation Manual

Page: 12 / 17

12
7.
Troubleshooting
Status Possible Cause Countermeasure
Gate Internal
Leakage
Operating pressure is too low Increase pressure to 0.45MPa or more
Foreign materials on Seal surface Cleaning the Seal Surface
Scratches on the seal surface of Gate Replace Gate
Scratches on the seal surface of Body Replace Body
Deterioration of O-ring by process exposure
Replace with new O-ring whose material
compatible with process environment
Twist of O-ring Re-install O-ring
Come off of O-ring Re-install O-ring
Peeling off of O-ring Replace O-ring
Concave/Convex of end of O-ring
Place the convex part into the groove to
make O-ring height the same
Deterioration of Bonnet assembly Replace Bonnet assembly
External Leakage
Damage of Bellow assembly Replace Bellows assembly
Deterioration of O-ring by processing
Replace with new O-ring whose material
compatible with process environment
Scratches on the seal surface Polish of seal surface
Gate is not CLOSING
End lock operation lock Please refer to 4-4
Deterioration of Bonnet assembly Increase pressure to 0.45MPa or more
Deterioration of Bonnet assembly Replace Bonnet assembly
Gate is not OPENING
End lock operation lock Please refer to 4-4
Operating pressure is too low Increase pressure to 0.45MPa or more
Deterioration of Bonnet assembly Replace Bonnet assembly
Auto-switch not
working
Displacement of Auto-switch Adjust the location to detect range
Failure of Auto-switch Replace Auto-switch
Operating pressure is too low Increase pressure to 0.45MPa or more
Bonnet assembly air
leakage Loosening of connections Replace Bonnet assembly
Wear on piston seal Replace Bonnet assembly