Fault Clearance - GEM 613 Installation, Operating And Maintenance Instructions

20 Troubleshooting / Fault clearance
Fault
Working medium escapes
from leak detection hole*
Valve doesn't open or doesn't
open fully
Valve leaks downstream
(doesn't close or doesn't close
fully)
Valve leaks between actuator
and valve body
Valve body connection to
piping leaks
Valve body leaks
* see chapter 21 "Sectional drawings and spare parts"
Possible cause
Valve diaphragm faulty
Valve diaphragm incorrectly mounted
Actuator faulty
Voltage is not connected
Incorrect assembly
Operating pressure too high
Foreign matter between valve
diaphragm and valve body weir
Valve body weir leaking or damaged
Actuator faulty
Voltage is not connected
Incorrect assembly
Valve diaphragm faulty
Valve diaphragm incorrectly mounted
Bolting between valve body and
actuator loose
Valve diaphragm faulty
Valve body / actuator damaged
Incorrect installation
Threaded connections loose
Sealing material faulty
Valve body faulty
GEMÜ 618: valve body corroded
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Fault clearance

Check valve diaphragm for damage,
replace diaphragm if necessary
Remove actuator, check diaphragm
mounting, replace if necessary
Replace actuator
Connect voltage
Check assembly and wiring of the
electrical connection
Operate valve with operating pressure
specifi ed in data sheet
Remove actuator, remove foreign
matter, check valve diaphragm and
valve body weir for damage and replace
if necessary
Check valve body weir for damage,
if necessary replace valve body
Replace actuator
Connect voltage
Check assembly and wiring of the
electrical connection
Check valve diaphragm for damage,
replace diaphragm if necessary
Remove actuator, check diaphragm
mounting, replace if necessary
Retighten bolting between valve body
and actuator
Check valve diaphragm for damage,
replace diaphragm if necessary
Replace valve body / actuator
Check installation of valve body in
piping
Tighten threaded connections
Replace sealing material
Check valve body for damage, replace
valve body if necessary
613, 618