Trouble Shooting - SPX FLOW APV DELTA SDMS4 Instruction Manual

APV
APV_SDMS4_UK-0_112017.indd
Failure
Valve closed and pressure in upper housing
Valve is untight, leakage via the leakage valves
Leakage from the leakage bore
in the area of the valve yoke
Leakage between housing
and yoke flange
Leakage at leakage valve
Actuator
Air escapes from the actuator rod.
Actuator does not work (air escapes permanently
from the venting plug).
Valve position indication
Feedback is missing.
If damaged seals are replaced, generally all seals should be renewed.
For valve service actions, we supply complete seal kits (see spare parts lists).
Double seal valve with diaphragm and ,,fan support"
DELTA SDMS4
Instruction Manual UK-rev.0

15. Trouble Shooting

Remedy
Replace seat seals (16, 17).
Check line pressure (max. 10 bar)
Check tightening torque of safety nut.
Replace diaphragm (13) and o-rings (15).
Replace diaphgram (13) and o-ring (12).
Replace o-rings (10).
(see RN 01.054.67-1)
Check cleaning supply line.
Replace the v-seal (2) and o-ring (3) in the
seal screw (1).
(see RN 01.054.86)
Replace complete actuator.
Carry out fine adjustment.
UK
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