Through 60/60I Actuators; Side‐Mounted Handwheel For Sizes - Emerson Fisher 657 Instruction Manual

Instruction Manual
D100306X012
5. Place the handwheel (key 51), and the stop nut (key 54) on the handwheel stem (key 133). Tighten the hex nut to
fasten the parts together. Secure the nut with the cotter pin (key 247).
6. If the body (key 142) was separated from the upper diaphragm casing (key 1, figures 6, 7, 8, 9, or 10), lubricate the
O‐ring (key 139) with lithium grease (key 241), and place the O‐ring in the body. Align the holes in the diaphragm
casing and the body, insert the cap screws (key 141), and tighten them evenly following a crisscross pattern to
ensure a proper seal.
7. Position the upper diaphragm casing (key 1) on the diaphragm (key 2) and align the holes.
Note
When you replace actuator diaphragms in the field, take care to ensure the diaphragm casing bolts are tightened to the proper
load to prevent leakage, but not crush the material. Perform the following tightening sequence with a manual torque wrench for
size 30/30i‐70/70i and 87 actuators.
CAUTION
Over‐tightening the diaphragm casing cap screws and nuts (keys 22 and 23) can damage the diaphragm. Do not exceed 27
NSm (20 lbfSft) torque.
Note
Do not use lubricant on these bolts and nuts. Fasteners must be clean and dry.
8. Insert the cap screws (key 22), and tighten the hex nuts (key 23) in the following manner. The first four hex nuts
tightened should be diametrically opposed and 90 degrees apart. Tighten these four hex nuts to 13 NSm (10 lbfSft).
9. Tighten the remaining hex nuts in a clockwise, criss‐cross pattern to 13 NSm (10 lbfSft).
10. Repeat this procedure by tightening four hex nuts, diametrically opposed and 90 degrees apart, to a torque of 27
NSm (20 lbfSft).
11. Tighten the remaining hex nuts in a clockwise, criss‐cross pattern to 27 NSm (20 lbfSft).
12. 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.
13. Once completed, no more tightening is recommended.
14. Mount the actuator on the valve following the procedures in the Installation section.
Side‐Mounted Handwheel for Sizes 34 through 60 and 34i through 60i
Actuators
A side-mounted handwheel assembly is normally used as a manual actuator for sizes 34 through 60 (figures 13 and 15)
and 34i through 60i actuators (figures 14 and 16). Turning the handwheel counter-clockwise past the neutral position
opens the valve. Two levers (key 146, figures 13, 14, 15, and 16) on a handwheel assembly operate the valve by
moving the valve stem.
Instructions are given below for complete disassembly and assembly. Perform the disassembly only as far as necessary
to accomplish the required maintenance; then begin the assembly at the appropriate step.
657 Actuator (30/30i-70/70i and 87)
June 2018
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