Gemu 512 - Replacement of seat seal

11 / 16
512, 514, 532
elastomer / PTFE / elastomer / PTFE
(lubricate beforehand with
Dowcorning 111 Molycote)
+
Arrange the sharp-edged sides
of the chevron packings 8 and
33 in the direction of the valve
body, otherwise no sealing
tightness will be achieved!
3. Pressure ring 9
4. Compression spring 6
5. Guide bush 5
15. Lock gland packing in place with
circlip 3.
16. Insert new lip ring 26 in base of
actuator A.
17. Push spindle 2 through base of
actuator A.
18. Insert O-ring 22 between piston and
piston cover.
19. Insert new lip ring 21 in piston cover.
20. Fix piston-spindle connection in the
base of actuator A with hexagon nut 11.
21. Push piston sleeve 13 into cover of
actuator A.
22. Insert O-ring 24 and compression
springs in piston sleeve 13.
23. Put cover and base of actuator A
together and insert connecting screws.
24. Clamp actuator A in a press and press
cover and base of actuator A fl ush
together.
CAUTION
Actuator cover will break if
pressure is too high!
® Only use minimum required
pressure.
25. Tighten connecting screws between
cover and base of actuator A diagonally.
26. Slowly release the press.
27. Assemble actuator A as described in
chapter 1.4, points 1-5.
1.3 Replacement of seat seal
1. Disassemble actuator A as described in
chapter 1.1, points 1-4.
2. Loosen retaining nut 19 on spindle 2
(hold spindle 2 with appropriate tool that
will not damage the spindle surfaces).
3. Remove seat seal 14.
4. Clean all parts, do not scratch or
damage the parts during cleaning.
5. Insert new seat seal 14.
6. Apply appropriate thread locking
compound on the thread of valve
plug 15.
7. Position retaining nut 19 (hold spindle 2
with appropriate tool that will not
damage the spindle surfaces) and
tighten.
8. Assemble actuator A as described in
chapter 1.4, points 1-5.
+
Important:
Replacement of the version with
steel seat seal only by GEMÜ.
Send the complete valve with
the completed goods return
declaration to GEMÜ.