GEM 673P9 Series, Инструкция по установке, эксплуатации и обслуживанию

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18 Troubleshooting / Fault clearance
Fault Possible cause Fault clearance
Medium escapes from
leak detection hole* (leak
detection hole only existing
for diaphragm size 25 - 50,
if the special screw 15 was
opened or removed)
Shut off diaphragm faulty
Check shut off diaphragm for damage,
replace diaphragm if necessary
Valve doesn't open or
doesn't open fully
Bonnet faulty Replace bonnet
Shut off diaphragm incorrectly mounted
Remove bonnet, check diaphragm
mounting, replace if necessary
Valve leaks downstream
(doesn't close or doesn't
close fully)
Operating pressure too high
Operate valve with operating pressure
specified in data sheet
Foreign matter between shut off
diaphragm and valve body weir
Remove bonnet, remove foreign matter,
check shut off diaphragm and valve body
weir for damage and replace if necessary
Valve body weir leaking or damaged
Check valve body weir for damage, if
necessary replace valve body
Shut off diaphragm faulty
Check shut off diaphragm for damage,
replace diaphragm if necessary
Seal adjuster is incorrectly set Readjust the seal adjuster
Valve leaks between
bonnet and valve body
Shut off diaphragm incorrectly mounted
Remove bonnet, check diaphragm
mounting, replace if necessary
Bolting between valve body and bonnet
loose
Retighten bolting between valve body and
bonnet
Shut off diaphragm faulty
Check shut off diaphragm for damage,
replace diaphragm if necessary
Valve body / bonnet damaged Replace valve body / bonnet
Valve body connection to
piping leaks
Incorrect installation Check installation of valve body in piping
Bolting / threaded connections loose Tighten bolting / threaded connections
Sealing material faulty Replace sealing material
Valve body leaks Valve body faulty or corroded
Check valve body for damage, replace
valve body if necessary
Handwheel cannot be
turned
Bonnet faulty Replace bonnet
Threaded spindle seized
Dependent on the operating conditions,
regrease the threaded spindle, especially
a valve that is autoclaved; replace bonnet
if necessary.
See chapter 10.3, point 5.
* see chapter 20 "Sectional drawings and spare parts"
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673P9