C67
18 Troubleshooting / Fault clearance
Fault
Possible cause
Fault clearance
Working medium escapes from
leak detection port* and / or
threaded handwheel spindle
(dependent on mounting position)
Diaphragm faulty
Replace valve
Valve doesn't open or doesn't
open fully
Bonnet faulty
Replace valve
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 diaphragm
and valve body weir
Replace valve
Valve body weir damaged
Replace valve
Diaphragm faulty
Replace valve
Travel stop** incorrectly set
Correctly adjust travel stop
Valve body connection to piping
leaks
Incorrect installation
Check installation of valve body in piping
Union nuts loose
Tighten union nuts
Handwheel cannot be turned
Bonnet faulty
Replace valve
* see chapter 10 "Construction"
** see chapter 11.3 "Setting the seal adjuster"
17 Information
Note on staff training:
Please contact us at the address
on the last page for sta
ff
training
information.
Should there be any doubts or
misunderstandings in the preceding text,
the German version of this document is the
authoritative document!
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Summary of Contents for C67 CleanStar
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