FlowAct Diaphragm Linear Actuator FCD VLENIMFACTA4 10/16
48
Actuator with Stroke Limitation
Spring-to-close or -open
Disassembly instruction of the stroke limitation
subassembly
NOTICE
Limit disassembly only to necessary compo-
nents.
1. Fix the actuator on the assembly table, if this is not
already happened.
2. Loosen the hex nut (379) counter-clockwise.
3. Remove the plain washer (376), cover (381) and the
pipe section (387).
4. Unlock the lock nuts (350, 2x) counter-clockwise.
5. Loosen the socket head screws (333) counter-clockwise.
6. Lift off the socket head screws (333), plain washers
(334), yoke plate (378) and yoke rods (377).
7. Loosen the stud bolt (385) counter-clockwise.
8. Unlock the lock nuts (350, 2x) counter-clockwise.
9. Store all stroke limitation-parts safely, lose no parts.
10. For disassemble the actuator subassembly see pages
46 - 49.
Reassembly instruction of the stroke limitation
subassembly
11. Lubricate the threads of the actuator and stroke limita-
tion-parts with an appropriate lubricant.
12. Mount the lock nuts (350, 2x) clockwise.
13. Mount the stud bolt (385) onto the actuator.
14. Arrange the yoke rods (377, 3x) onto the upper guide
bushing.
15. Lower the yoke plate (378) onto the stud bolt (385) on
the yoke rods (377).
16. Install the plain washers (334) and socket head screws
(333) and finger tighten it clockwise.
17. Tighten the socket head screws (333) using a cross-
wise pattern clockwise.
18. Mount the lock nuts (350, 2x) clockwise.
19. Connect the actuator with the air supply. Control the
air supply until the desired upper and lower stroke po-
sition is approached. Position the lock nuts (350) at
the end positions and secure them.
20. Place the pipe section (387) onto the upper guide
bushing.
21. Place the flange (381) onto the pipe section (387).
22. Mount the washer (376) and hex nuts (379) and fin-
ger-thigten.
23. Perform 3 full strokes and check on the stroke indica-
tor whether the desired positions are achieved.
24. Log the maintenance interval and the work performed.
25. The actuator subassembly is ready to be mounted on
the valve and the accessories attached.
