SPX APV DELTA M4, Руководство по эксплуатации

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13. Trouble Shooting
M4 valve equipped with membrane.
The item numbers refer to the spare parts drawings.
- Valve leaks : Replace seat seal (2).
Check line pressure.
- Leakages from the
leakage bore
: Check tightening torque
of coupling.
Replace membrane (4).
- Leakages between housing
and yoke flange
: Check line pressure.
Replace membrane (4).
MP4 valve equipped with membrane shaft.
The item numbers refer to the spare parts drawings.
- Valve leaks : Replace membrane
shaft (4).
Check line pressure.
- Leakages from the
leakage bore
: Check line pressure.
Replace membrane
shaft (4).
- Leakages between housing
and yoke flange
: Replace O-ring (2).
Actuator and valve position indication
- Air escapes from the
actuator
: Dismantle actuator (13)
(see spare parts list from valve, replace seal (2)
RN: 01.054.86) and O-ring (3) in the seal
screw (1).
- Actuator does not operate,
air escapes permanently
via the venting plug
: Replace actuator.
- Valve position indication
is missing or unprecise:
Carry out fine adjustment
according to service
instructions of control unit.
14. Spare Parts Lists
(see annex)
21
Membrane Valve
DELTA M4
Operating Manual Rev. 1
UK