Top-Mounted Handwheel - Emerson Fisher 1052 Instruction Manual

Instruction Manual
D100322X012
Use the following procedure to convert from styles A and D to styles B and C (or vice versa) or to change the mounting
position.
1. Follow steps 1 through 6 in the Disassembly portion of the Maintenance section.
2. If changing styles,
a. Unscrew cap screws (key 23), and remove the actuator housing (key 20) from the mounting yoke (key 22).
b. Rotate the housing 180 degrees, maintaining the appropriate position (1, 2, 3, 4), and place the actuator onto
the mounting yoke.
3. If changing position, unscrew cap screw (key 23), and rotate the actuator housing to the desired position. Consult
table 2 for appropriate bolt torques.
4. Secure actuator housing (key 20) to the mounting yoke (key 22) with cap screws (key 23). Consult table 2 for
appropriate bolt torques.
5. Follow steps in the Mounting Procedure section to connect the actuator to the valve.
6. Adjust initial spring compression as described in the Adjusting Spring Compression section.

Top-Mounted Handwheel

Key numbers used in this section are shown in figure 4 except where indicated.
The optional top‐mounted handwheel, shown in figure 4, can be used as a manual actuator or as an adjustable "up"
travel stop to limit full retraction of the diaphragm rod (key 10, figure 5).
The handwheel assembly is attached to a special upper diaphragm casing (key 1, figure 5) with cap screws (key 141). A
hex nut (key 137) locks the handwheel in position.
Turning the handwheel (key 51) clockwise into the upper casing forces the pusher plate (key 135) against the
diaphragm and diaphragm plate (keys 3 and 4, figure 5) to compress the spring (key 11, figure 5) and move the
diaphragm rod downward. Turning the handwheel counterclockwise allows the actuator spring to move the
diaphragm rod upward. If the valve is "push‐down‐to‐close", full opening can be restricted by positioning the
handwheel at the desired position. If the valve is "push‐down‐to‐open," full closing of the valve can be restricted by
using the handwheel.
Instructions are given below for complete disassembly and assembly required for inspection and parts replacement.
Disassembly
WARNING
To avoid personal injury from the precompressed spring force thrusting the upper diaphragm casing (key 1, figure 5) away
from the actuator, relieve spring compression before diaphragm casing bolting is loosened.
1. Remove the upper diaphragm casing (key 1, figure 5) by following steps 1 through 5, and 7 of the Disassembly part
of the Maintenance section.
2. Remove the cotter pin, hex nut, handwheel, and locknut (keys 247, 54, 51, and 137). Unscrew the stem (key 133)
out through the actuator end of the handwheel body (key 142).
1052 Size 20 Actuator (F & G)
February 2019
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