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1052PSV Actuator
May 2011
14. Thread the rod end bearing assembly completely into the turnbuckle (key 57) without torquing.
15. Install the diaphragm (key 3) onto the diaphragm plate (key 4) and line up the perimeter holes in the diaphragm
(key 3) and the lower diaphragm casing (key 2). Place the upper diaphragm casing (key 1) onto the lower
diaphragm casing (key 2). If necessary, rotate the spring adjustor (key 74) so that the upper diaphragm casing will
achieve solid contact with the diaphragm (key 3). Also ensure that the travel stop, in the upper diaphragm casing
(key 1), will not contact the diaphragm (key 3) when the casing cap screws and nuts (keys 5 and 6) are tightened.
16. Using a 9/16 inch wrench, secure the upper diaphragm casing (key 1) with cap screws (key 5), washers (key 26),
and hex nuts (key 6). Tighten the hex nuts (key 6) in the following manner.
a. The first four hex nuts tightened should be diametrically opposed and 90 degrees apart. Tighten these four hex
nuts to 13.6 NSm (10 lbfSft).
b. Tighten the remaining hex nuts in a clockwise, criss-cross pattern to 13.6 NSm (10 lbfSft).
c. Repeat this procedure by tightening four hex nuts, diametrically opposed and 90 degrees apart, to a torque of 27
NSm (20 lbfSft).
d. Tighten the remaining hex nuts in a clockwise, criss-cross pattern to a torque of 27 NSm (20 lbfSft).
e. After the last hex nut is tightened to 27 NSm (20 lbfSft), all of the hex nuts should be tightened again to 27 NSm
(20 lbfSft) in a circular pattern around the bolt circle.
17. Perform the initial spring setting per the 1052PSV Spring Adjustment section.
18. Refer to the Actuator Mounting section if the actuator is not already mounted.
19. Install the lever (key 27) on the valve drive shaft as shown in figure 12. Note: The splined connection is a missing
tooth design, ensuring a one-way assembly.
Figure 12. Lever Angle in Valve Closed Position
20. Viewing from the actuator end, rotate the lever counter-clockwise (CCW) to 45 degrees from horizontal as shown
in figure 12.
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Instruction Manual
D103407X012
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