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FlowAct Diaphragm Linear Actuator FCD VLENIMFACTA4 10/16
44
Actuator with attachments
Spring-to-close
Disassembly instruction of the actuator subas-
sembly
NOTICE
Limit disassembly only to necessary compo-
nents.
1. Fix the actuator on the assembly table, if this is not
already happened.
2. Disassemble the coupling parts and yoke (see page
54).
3. Disassemble the hexagon bolts (335), plain washers
(337) and hexagon nuts (351).
4. Pull off the protection sleeve (339).
WARNING
Risk of injury by jump-
ing out parts ! Pre-loaded
springs inside.
5. 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 using threaded bolts
meeting standards from ISO 898-1,
8.8 or higher, as well as washers and nuts.
6. Lift off the diaphragm casing (202 - 389), distance
plate (231) and spring adjusting plate (326).
7. Remove the actuator springs (229).
8. Carefully pull out the diaphragm-stem unit (211 - 374).
9. Remove the scraper rings (273) and O-rings (275).
10. Secure the diaphragm-stem unit into the Special Tool.
11. Loosen the stem (348) counterclockwise and remove
the lock washer (349), distance bushing (374), spacer
bushing (228), disk (220), diaphragm plate (227), dia-
phragm (225), O-ring (272) and thrust washer (255).
12. 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
NOTICE
Always replace parts showing wear with
new parts.
13. Lubricate the new O-rings (275), new scraper rings
(273) with an appropriate lubricant and install into the
guide bushings (253).
14. Lubricate the new O-ring (272) with an appropriate
lubricant.
15. Lower the thrust washer (255), O-ring (272), dia-
phragm (225), diaphragm plate (227),
disk (220), spacer bushing (228), distance
bushing (374) and lock washer (349)
onto the stem (211).
16. Lubricate the thread of the stem (211) with an appropri-
ate lubricant and install and finger tighten the stem (348).
NOTICE
The diaphragm plate should be posi-
tioned to the diaphragm with the aid
of the Positioning Template. Mark the position.
17. Turn clockwise the stem (348) using a suitable torque
wrench.
18. Loosen and remove the diaphragm-stem unit (211-
374) from the Special Tool. Lubricate the actuator
stem with an appropriate lubricant.
19. Carefully lower the diaphragm-stem unit (211- 374)
into the diaphragm casing.
NOTICE
Position the diaphragm-stem unit
such that the air connection and the
Mark align.
20. Install and align the actuator springs (229).
21. Install and position the spring adjusting plate (326)
such that the imprint on the plate and air connection
are opposite of each other.
22. Install the distance plate (231) and diaphragm casing
(203), position the casing allowing the air connections
to be opposite of each other.
23. Lubricate the threats of the long hexagon bolts (336)