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GEMÜ R478 Tugela
17 Troubleshooting
17 Troubleshooting
Error
Possible cause
Troubleshooting
The product doesn't open or doesn't open
fully
Actuator defective
Replace the actuator
Operating pressure too high
Operate the product with operating pres-
sure specified in datasheet
Foreign matter in the product
Remove and clean the product
The actuator design is not suitable for the
operating conditions
Use an actuator that is designed for the
operating conditions
Flange dimensions do not comply with
specifications
Use correct flange dimensions
Inside diameter of piping too small for
nominal size of product
Install product with suitable nominal size
The product leaks downstream (doesn't
close or doesn't close fully)
Operating pressure too high
Operate the product with operating pres-
sure specified in datasheet
The product doesn't close or doesn't
close fully
The actuator design is not suitable for the
operating conditions
Use an actuator that is designed for the
operating conditions
Foreign matter in the product
Remove and clean the product
Connection between valve body and pip-
ing leaking
Incorrect installation
Check installation of valve body in piping
Threaded connections / unions loose
Tighten threaded connections / unions
Sealing material faulty
Replace sealing material
Valve body leaks
Valve body leaks or is corroded
Check valve body for damage, replace
valve body if necessary
Incorrect installation
Check installation of valve body in piping
Increased switching noises when opening
the product
When the disc is in the closed position,
this may cause a higher breakaway
torque
Use the product regularly
Actuator does not open or does not open
correctly
Control medium not connected
Connect the control medium
End positions incorrectly set
Correctly set the end positions (see "Set-
ting the end positions")
Stroke limiter (optional) incorrectly set
Correctly set the stroke limiter (optional)
Contaminated control medium
Disassemble and clean the actuator, in-
stall a filter upstream
Actuator leaking at the mounting flange
Actuator damaged
Check the actuator for potential damage,
replace the actuator if necessary
Valve body damaged
Check valve body for potential damage,
replace valve body if necessary
Unions loose
Tighten unions
Incorrect assembly
Check actuator mounting on the valve
body
