Changing Or Replacing Actuator Lever - Emerson Fisher 2052 Instruction Manual

Instruction Manual
D103296X012

Changing or Replacing Actuator Lever

WARNING
Avoid personal injury or property damage. The end plate assembly (key 3) and lever (key 14) may only be removed after the
actuator spring compression forces are safely relieved. Refer to the instructions below.
Disassembly
WARNING
Avoid personal injury or property damage from sudden release of process pressure or bursting of parts. Before performing
any maintenance operations:
D Do not remove the actuator from the valve while the valve is still pressurized.
D Always wear protective gloves, clothing, and eyewear when performing any maintenance operations.
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 Safely vent the power actuator loading pressure.
D Use lock‐out procedures to be sure that the above measures stay in effect while you work on the equipment.
D Check with your process or safety engineer for any other hazards that may be present from exposure to process media.
1. Isolate the valve body from the process. Release process pressure and vent all actuator pressure.
2. Remove the cover or plug (key 2).
WARNING
To avoid personal injury and equipment damage from moving parts, keep fingers and tools clear while stroking the
actuator with the cover removed.
3. Loosen the cap screw (key 15).
4. Follow steps 2 through 10 in the Replacing Diaphragm Plate, Diaphragm Rod Assembly, and Spring(s) section.
5. Remove and inspect the lever (key 14). If the lever is worn or damaged, or if the actuator will be mounted to a valve
body requiring a different size lever, replace the lever.
6. Inspect the bushings located in the end plate (key 3) and housing (key 1) assemblies. If bushings are excessively
worn or damaged, remove them with a press. Press in new bushings so that they are flush with the exterior surfaces
of the actuator housing and the end plate assembly.
Assembly
1. Refer to figure 4 for the correct orientation of the lever during assembly.
2. If a cam‐operated positioner is used, install the cam to the lever with the parts provided by the appropriate
instrument mounting kit. Be sure to observe the orientation shown in figure 4 and follow all procedures given in the
positioner instruction manual.
3. Insert the lever into the bushing in the actuator housing.
4. Fasten the rod end bearing diaphragm rod assembly to the lever using the cap screw (key 16) and nut (key 17) if
applicable. Tighten per table 6.
2052 Actuator
June 2017
11