Instruction Manual
D103407X012
1052PSV Actuator
May 2011
10
CAUTION
The bolt pattern on the travel indicator scale (key 35) is symmetric, meaning the component could be installed in multiple
orientations. Ensure the travel indicator scale is mounted correctly as shown in figure 10, otherwise there will be false valve
position indication.
WARNING
Be aware of pinching parts during installation, maintenance, and adjustments of valve/actuator components. To avoid
injury, keep hands and tools clear of actuator access windows when operating or adjusting the actuator.
Actuator Spring Adjustment
Initial Setting
The 1052PSV nameplate specifies an initial spring setting. Initial setting is the casing pressure at which the diaphragm
and diaphragm rod begin to move away from the up travel stop
with the actuator disconnected from the valve
.
(With the actuator connected to the valve and pressure applied to the valve, a higher pressure will be required to start
actuator travel).
The initial setting was selected (based upon the service conditions specified when the actuator was ordered) so that,
when the actuator and valve are in service, the valve will seat properly and full travel will be obtained within a
diaphragm casing range of 0 to 2.8 bar (0 to 40 psig).
If the actuator has been disassembled or if the spring adjustment was changed, and it is desired to match the initial
setting stated on the nameplate, make sure the rod end bearing (key 17, figure 13) has been disconnected from the
lever (key 27, figure 13). Adjust the spring so that the diaphragm rod just starts to travel at the spring set pressure
specified on the nameplate.
Be sure the rod end bearing does not hit the lever as the diaphragm and diaphragm rod move away from the up travel
stop. To adjust the spring, use the special 2-1/2 inch wrench. Rotate the spring adjustor to move it toward the casing
to increase initial setting or away from the casing to decrease initial setting (keys 1 and 2, figure 13).
1. A regulated air supply with an appropriate gauge will be required to supply air pressure on top of the diaphragm to
stroke the actuator.
2. Rotate the spring adjustor (key 74), with the special 2-1/2 inch hex wrench, GE45169, so that the diaphragm rod
(key 10) just starts to travel at the spring set pressure specified on the nameplate (0.34 bar [7.0 psig] typical).
Note
Perform this setting with the actuator disconnected from the valve. The spring adjustor will need to compress the springs
(keys 11
and 12) approximately 1-7/8 inch for a 0.34 bar (7.0 psig) initial spring set.
Stroking Range
The initial spring setting listed on the nameplate has been determined to be the optimum setting, and it is not
recommended to make spring adjustments that will cause this value to change or be exceeded. For