Changing Actuator Mounting - Emerson Fisher 1052 Instruction Manual

1052 Size 20 Actuator (F & G)
February 2019
1. Replace the bushing (key 31) if it was removed.
2. If the diaphragm rod/bearing assembly (key 10) was removed from the actuator and separated from each other,
thread the rod into the bearing.
3. Bolt the rod end bearing to the lever (key 27) with cap screw (key 18). Coat the threads of the cap screw with
medium strength thread‐locking compound.
4. If necessary, assemble the lever using two travel stop studs (key 8) and locking nuts (key 86) for old and new style
levers. Newer levers are clamped, and will also require that you install the cap screw (key 28) and thread the lock nut
(key 145) in place, but do not tighten it at this time.
5. Place the lever, rod end bearing, and diaphragm rod into the actuator with the diaphragm rod inside the diaphragm
housing (key 20).
6. Install the thrust washer (key 71), followed by the spring adjusting screw (key 74), the spring seat (key 13), and the
spring (key 11) into the diaphragm housing.
7. Attach the diaphragm plate (key 4) to the diaphragm rod with cap screw (key 9) and washer (key 79). Apply lithium
grease (key 76) to the portion of the rod that fits into the diaphragm plate.
8. Replace the diaphragm (key 3). Position the diaphragm casing (key 1) in place on the diaphragm housing (key 20).
Secure the diaphragm casing with cap screws and nuts (keys 5 and 6). Ensure that the warning plate (key 56) is
replaced on the casing.
9. Attach the valve to the actuator, and position the travel indicator as described in the Mounting Procedure section.
10. Adjust the initial spring compression as described in the Adjusting Spring Compression section.

Changing Actuator Mounting

The actuator is normally positioned vertically in a horizontal pipeline. However, each style can be mounted in four
possible mounting styles and four possible positions. See figure 2.
WARNING
Avoid personal injury or property damage from sudden release of process pressure or uncontrolled movement of parts.
Before performing any maintenance operations:
D Always wear protective gloves, clothing and eyewear when performing any maintenance operations to avoid personal
injury.
D Disconnect any operating lines providing air pressure, electric power, or a control signal to the actuator. Be sure the
actuator cannot suddenly open or close the valve.
D Use bypass valves or completely shut off the process to isolate the valve from process pressure. Relieve process
pressure from both sides of the valve. Drain the process media from both sides of the valve.
D Vent the power actuator loading pressure and relieve any actuator spring precompression.
D Use lock‐out procedures to be sure that the above measures stay in effect while you are working on the equipment.
D The valve box may contain process fluids that are pressurized, even when the valve has been removed from the pipeline.
Process fluids may spray out under pressure when removing the packing hardware or packing rings, or when loosening
the packing box pipe plug.
D Check with your process or safety engineer for any additional measures that must be taken to protect against process
media.
Style A is right‐hand mounted while style D is left‐hand mounted. In all other ways the styles A and D are identical.
Style B is right‐hand mounted while style C is left‐hand mounted. In all other ways the styles B and C are identical.
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Instruction Manual
D100322X012