Packing Load Adjustment; Replacing The Trim Parts - Emerson Fisher Vee-Ball SS-84PSV4 Instruction Manual

SS-84PSV4 Valve
September 2022
Stop Screw Gap Settings
1. Apply thread-locking compound (medium strength) (key 77) to the two 3/8-24 x 1.25 stop cap screws (key 17).
Install the stop screws with two 3/8-24 jam nuts (key 18) in the stop flange (key 16). Final stop screw lock position
will be set with gauged clearance to the packing flange.
2. Install the stop flange assembly against the packing follower (key 25).
3. Install three Belleville springs (key 160) on top of the stop flange (key 16). Orient the Belleville stack as shown in
figure 7.
4. Apply thread-locking compound (medium strength) (key 77) to the two 3/8-24 x 1.75 stop cap screws (key 19).
Install the stop screws with two 3/8-24 jam nuts (key 18) in the packing flange (key 26). Final stop screw lock
position will be set with gauged clearance to the stop flange.
5. Install the packing flange assembly on top of the Belleville springs (key 160).
6. Lubricate the two 5/8-11 packing flange studs (key 6) with nuclear grade anti­seize lubricant (key 30). Install two
5/8-11 packing flange nuts (key 27), using a 15/16 inch hex wrench.
7. Tighten, without torquing, the packing flange nuts (key 27) until they are snug and finger-tight against the packing
flange (key 26). Use care to keep the packing flange parallel to the stop flange (key 16) (see figure 7).
8. Use gap gage GE39245 to set the 0.122 inch gap A for the packing flange stop screws (key 19) and the top of the
stop flange (key 16). Torque the nut (key 18) to 41 NSm (30 lbfSft).
9. Use gap gage GE39245 to set the 0.164 inch gap B for the stop flange stop screws (key 19) and the bottom of the
packing flange (key 26). Torque the nut (key 18) to 41 NSm (30 lbfSft).

Packing Load Adjustment

Use the following steps to increase the packing load from nominal to maximum packing load.
1. Loosen the stop nuts (key 18) and retract the two 3/8-24 x 1.75 stop cap screws (key 19) three full turns.
2. Apply thread-locking compound (medium strength) (key 77) to the two stop cap screws (key 19) and torque to 41
NSm (30 lbfSft).
3. Tighten the packing flange nuts (key 27) until the 0.164 inch gap B for the stop flanges stop screws (key 17) goes to
zero and just contacts the packing flange (key 26). This will set the packing stress to the maximum value.
If needed, refer to the appropriate sections of the Fisher 1052PSV Size 60 Rotary Actuator Instruction Manual
(D103407X012) to connect the valve to the actuator and assemble the actuator.

Replacing the Trim Parts

Perform this procedure if the control valve components are at a recommended replacement interval, scratched or
damaged, showing performance degradation at routine diagnostics, or the valve is not shutting off properly.
This section describes how to replace the drive shaft assembly, thrust washer, bushings, Vee-Ball assembly, and sleeve
seal components (keys 9, 8, 7, 2, and 20, 21, 22).
Disassembly
The actuator may remain mounted on the valve as you replace these components.
Key numbers are shown in figure 8, unless otherwise indicated. The sleeve seal assembly with key numbers is shown in
figure 5. If necessary, refer to the Fisher 1052PSV Size 60 Rotary Actuator Instruction Manual (D103407X012) for
disassembly and assembly instructions.
WARNING
Perform the steps in the WARNING at the beginning of the Maintenance section of this manual.
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Instruction Manual
D103416X012