Instruction Manual
D101550X012
8532 Valve
June 2017
17
7. Manually rotate the upper shaft (key 3) to turn the disk clockwise to meet the seal.
8. Tap the disk with a rubber mallet to drive it against the internal travel stop. When the disk makes contact with the
stop, manually rotate the disk counterclockwise back out of the seal to a 90‐degree open position. Repeat steps 7
and 8 three times.
Note
When attaching the actuator to the valve, make sure the valve disk is not in contact with the valve internal travel stop (see
figure 8). The valve disk should be positioned from 0 to 0.76 mm (0 to 0.030 inch) away from the internal stop in the valve body
(see figure 8).
9. Use an appropriate tool (such as a feeler gauge) to position the disk (key 2) from 0 to 0.76 mm (0 to 0.030 inch)
away from the internal stop in the valve body.
This adjustment is necessary to be certain that the actuator output torque is fully absorbed by the actuator travel stop
or by the actuator. The internal travel stop in the valve body should not absorb any of the actuator torque.
10. The final seating of the retaining ring screws can now be done. For the screw torque values, refer to table 6.
Anti‐Blowout Design, Packing, Valve Shaft, Disk, and Bearing
Maintenance
Note
The 8532 valve has a two‐piece shaft. In these procedures, the shaft (with the splined end) is called the upper shaft (key 3). The
shaft opposite the upper shaft is called the lower (follower) shaft (key 4).
CAUTION
When using an actuator, the actuator travel stop (or actuator travel adjustment, for actuators without adjustable stops)
must be adjusted so the disk stop in the valve does not absorb the output of the actuator. Failure to limit the actuator travel
as described in the next step can result in damage to the valve, shaft(s), or other valve components.
CAUTION
When removing the actuator from the valve, do not use a hammer or similar tool to drive the lever off the valve shaft.
Driving the lever or actuator off the valve shaft could damage the valve internal parts.
If necessary, use a wheel puller to remove the lever or actuator from the valve shaft. It is okay to tap the wheel puller screw
lightly to loosen the lever or actuator, but hitting the screw with excessive force could also damage internal valve parts.
Key numbers in this procedure are shown in figures 9 and 10 unless otherwise indicated.
1. Remove the valve from the pipeline. Remove the actuator from the valve.
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