Flowserve FlowAct Series User Instructions page 9

Diaphragm linear actuators are pressure vessels.
WARNING
Improper opening of the actuator can result in bodily injury.
Actuator assembly procedure
1. Fix the valve on the assembly table.
The orientation of the valve must be
NOTICE
in accordance with the appropriate
mounting position !
2. Lubricate all threads with a suitable, approved lubri-
cant (see Section 16).
3. Mount the actuator / yoke and yoke lock nut (76) onto
the valve bonnet.
4. Finger tighten and fix the yoke lock nut; turn clockwise
(see Section 15).
The legs of the yoke should be paral-
NOTICE
lel to the flow direction !
5. If the fail safe position at air failure moves the stem
into closing position then must the actuator connected
with the air supply to move the stem into the open
(retracted) position (in most cases).
WARNING
tween the yoke legs while the valve is in operation.
6. Mount the lock nut (113) and lower coupling (345)
onto the valve stem.
7. Justify the plug against the seat.
8. Adjust the distance between the lower coupling (345)
ant the upper coupling (249) with the aid of an adapter
in stroke height (Figure 7).
9. Disconnect the air supply so that the actuator moves
to the close position.
10. Mount the cap screws (240).
11. Lock the lock nut (113). Secure the upper coupling
(249) against turn unwanted with a wrench.
12. Adjust the stroke indicator scale so that the zero mark
is in conjunction with the stroke indicator.
13. Perform three full strokes and check if the stroke indi-
cator scale correspond with the end positions.
FlowAct Diaphragm Linear Actuator
Due to risk of crushing
hazard, do not work be-
14. The valve is ready for the mounting of the accessories.
344
249
Figure 6: Yoke assembly drawing
Item
Part
WW EU
76 5.10 Yoke lock nut
113 5.2 Lock nut
240 5.5 Cap screw
Table 4: Coupling parts identification
Figure 7: Stroke adjusting
FCD VLENIMFACTA4 10/16
Actuator
240
76
345
113
Valve
Item
Part
WW EU
249 5.3 Upper coupling
344 5.4 Lock nut
345 5.1 Lower coupling
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