SPX APV DELTA MS4, Operating Manual, Page: 22 / 51

DELTA MS4-UK0.qxp / 05.2008
UK
Diaphragm valve with fan support
DELTA MS4
Operating Manual rev. 0
17
12. Trouble Shooting
13. Spare Parts Lists
( see annex )
The reference numbers of the spare parts for the different valve
designs and sizes are included in the attached spare parts
drawings with corresponding lists.
Please indicate the following data to place an order
for spare parts:
- required number of parts
- reference number
- designation.
Data are subject to change.
F a i l u r e R e m e d y
Va l v e c l o s e d a n d p r e s s u r e i n u p p e r h o u s i n g
Valve is untight.
Replace seat seal (2).
Check line pressure (max. 10bar).
Leakage at the leakage bore
in the area of the valve yoke Check tightening torque of locknut.
Replace diaphragm (5) and o-ring (16).
Leakage between housing
and yoke flange
Replace o-rings (15).
A c t u a t o r
Air escapes at the actuator rod.
Replace o-ring (2) at the upper part
of the actuator.
Actuator does not work (air escapes permanently
from the venting plug).
Replace the complete actuator.
Va l v e p o s i t i o n i n d i c a t i o n
No feedback. Carry out fine adjustment.