Troubleshooting / Fault Clearance - Gemü 567 Original Einbau- Und Montageanleitung

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Troubleshooting / Fault clearance

Fault
Control medium escapes
from leak detection holes*
Working medium escapes
from leak detection holes*
Valve doesn't open or
doesn't open fully
Valve leaks downstream
(doesn't close or doesn't
close fully)
Valve leaks
Valve body connection to
piping leaks
Handwheel cannot be
turned
Valve body leaks
* see chapter 22 "Sectional drawings"
Possible cause
Actuator faulty
Plug diaphragm* faulty
Control pressure too low
Control medium not connected
Actuator faulty
Controller faulty
Controller not connected
Operating pressure too high
Foreign matter between
regulating cone* and seat
Valve body leaks or is damaged
O-ring* damage
Actuator* faulty
Plug diaphragm* faulty
Valve body, operator or distance
piece damaged
Mounting parts loose
Incorrect installation
Threaded connections loose
Sealing material faulty
Operator faulty
Valve body leaks or is corroded
Fault clearance
Check control medium for impurities, send valve to
GEMÜ for repair if necessary
Check plug diaphragm for damage, replace plug
diaphragm if necessary
Set control pressure in accordance with datasheet
Connect control medium
Replace actuator
Replace controller
Connect controller
Operate valve with operating pressure specified in
datasheet
Send valve to GEMÜ for repair
Check valve body for damage, replace valve body
if necessary
Send valve to GEMÜ for repair
Replace actuator
Check plug diaphragm for damage, replace plug
diaphragm if necessary
Replace valve body, operator or distance piece
Tighten mounting parts
Check installation of valve body in piping
Tighten threaded connections
Replace sealing material
Replace operator
Check valve body for damage, replace valve body
if necessary
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