FlowAct Diaphragm Linear Actuator FCD VLENIMFACTA4 10/16
66
Actuator with attachments
Spring-to-close
WARNING
Danger of life in case of improper
disassembly. The maximum sum
of the spring preload can be 60 000 N !
Disassembly instruction of the actuator subas-
sembly
NOTICE
For the disassembly, special tools such as a
hydraulic spring press, stem wrench and stem
clamping tool are necessary. Limit disassembly only to neces-
sary components.
1. Fix the actuator on the assembly table, if this is not
already happened.
2. Disassemble the hexagon bolts (335), plain washers
(337) and hexagon nuts (351) from the casing (203).
3. Pull off the protection sleeve (339).
WARNING
Risk of injury by jump-
ing out parts ! Pre-loaded
springs inside.
4. Lubricate the threads and loosen the long hexagon bolts
(336), plain washers (337) and hexagon nuts (351) uni-
formly in a clockwise sequence as the springs expand.
NOTICE
We recommend you to use a hydrau-
lic spring press, as a minimum re-
quirement threaded rods in 8.8 quality (ISO 898-1) or
higher as well as washers and nuts alternatively.
5. Lift off the diaphragm casing (203 - 389), distance
plate (231) and spring adjusting plate (326).
6. Remove the actuator springs (229).
7. Fix the stem (211) with the stem clamping tool against
twisting.
8. Loosen the stem (348) with the stem wrench counter-
clockwise and remove the lock washer (349), distance
bushing (374), spacer bushing (228), disk (220), dia-
phragm plate (227), diaphragm (225), O-ring (272) and
thrust washer (255).
9. Loosen the hexagon bolts (334) counterclockwise and
remove the O-rings (279), diaphragm casing (202)
and O-ring (276).
10. Disassemble the hexagon bolts (335), plain washers
(337) and hexagon nuts (351).
11. Pull off the protection sleeve (339).
WARNING
Risk of injury by jump-
ing out parts ! Pre-loaded
springs inside.
12. Lubricate the threads and loosen the long hexagon bolts
(336), plain washers (337) and hexagon nuts (351) uni-
formly in a clockwise sequence as the springs expand.
NOTICE
We recommend you to use a hydrau-
lic spring press, as a minimum re-
quirement threaded rods in 8.8 quality (ISO 898-1) or
higher as well as washers and nuts alternatively.
13. Lift off the diaphragm casing (202 - 373), distance
plate (231) and spring adjusting plate (326).
14. Remove the actuator springs (229).
15. Remove the stem clamping tool.
16. Disassemble the coupling parts (see page 54).
17. Carefully pull out the diaphragm-stem unit (211 - 380).
18. Pull out the scraper ring (273) and O-rings (275, 3x).
19. Fix the diaphragm-stem unit into the stem clamping
tool.
20. Loosen the stem extension (380) with the stem
wrench counterclockwise and remove the lock washer
(349), distance bushing (374), spacer bushing (228),
disk (220), diaphragm plate (227), diaphragm (225),
O-ring (272) and thrust washer (255).
21. Check stressed surface areas for damage such as
scoring and deformities. Use a brass brush or similar
tool to clean bolting. Check for corrosion or any other
damage.
Reassembly instruction of the actuator subas-
sembly
