FlowAct Diaphragm Linear Actuator FCD VLENIMFACTA4 10/16
15
flowserve.com
Disassemble the actuator from
the valve:
WARNING
Actuators are pressure vessels.
Improper opening of the actuator
can result in bodily injury.
1. Disconnect the air supply from the actuator and / or
assembled accessories.
2. Disassemble the accessories from the actuator as nec-
essary.
3. If is mounted a handwheel-side disassemble this first
(see pages 37 - 38).
4. Realize the fail safe position of the actuator. The coupling
parts must be free of positioning force.
WARNING
Crushing hazard ! The
actuator stem is under
spring load. Never disconnect the air supply during
next steps, the stem will extends very quickly.
• If the actuator stem is extended, drive it into re-
tracted position by connecting air supply.
• If the actuator stem is retracted no further action
is required.
• If the valve type is a three way valve drive the stem
into center position by connecting and control air
supply.
5. Keep upper coupling (249) from turning by secure with
a wrench. Turn the lock nut (113) clockwise to loosen.
6. Turn the cap screws (240) counterclockwise to loosen.
7. Turn the yoke lock nut (76) counterclockwise to loosen.
8. Disconnect the air supply from the actuator if appli-
cable.
9. Lift off the actuator safely.
10. Place the actuator on an assembly table and fix the
yoke for disassembly.
Actuator
240
76
345
113
Valve
249
344
Figure 8: Yoke assembly drawing
Item
Part
Item
Part
WW
EU
WW EU
76 5.10 Yoke lock nut 249 5.3 Upper coupling
113 5.2 Lock nut 344 5.4 Lock nut
240 5.5 Cap screw 345 5.1 Lower coupling
Table 10: Coupling parts identification
The modular design of the actuators enables a wide variety
of variants. Following therefore is always described the
individual module and not the entire actuator. We ask for your
understanding.
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