Troubleshooting - GEM B56 Operating Instructions Manual

16 Troubleshooting

Error
Valve does not open/close or does not
open/close fully
The product is leaking between actuator
and valve body
Connection between valve body and pip-
ing leaking
Valve body leaking
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Possible cause
Operating pressure too high
The actuator design is not suitable for the
operating conditions
Seat and flange seals incorrectly moun-
ted
Actuator defective
Voltage is not connected
Cable ends incorrectly wired
End positions incorrectly set
Foreign matter in the product
Actuator/valve body damaged
Bolting between valve body and actuator
loose
Seals faulty
Incorrect installation
Flange bolting loose/thread leaking
Flange seals faulty
Incorrect installation
Seat and flange seals incorrectly moun-
ted
Wrong seat and flange seals mounted
Seat and flange seals faulty
Valve body leaking or corroded
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16 Troubleshooting
Troubleshooting
Operate the product with operating pres-
sure specified in datasheet
Use an actuator that is designed for the
operating conditions
Replace seat and flange seals or mount
them correctly (see chapter "Replacing
seals")
Replace the actuator
Connect voltage
Wire cable ends correctly
Correctly set the end positions
Remove and clean the product
Replace actuator/valve body
Tighten bolting between valve body and
actuator
Replace seals
Check installation of valve body in piping
Retighten flange bolting / reseal threads
Replace flange seals
Check installation of valve body in piping
Mount seat and flange seals correctly
(see chapter "Replacing seat seals")
Replace seat and flange seals (see
chapter "Replacing seat seals")
Replace seat and flange seals (see
chapter "Replacing seat seals")
Check valve body for damage, replace
valve body if necessary
GEMÜ B56