Troubleshooting; Actuator Mounting - Emerson Fisher SS-264 Instruction Manual

SS-264 Valve
September 2021

Troubleshooting

Table 5. Troubleshooting
Problem
Packing Leakage
Bonnet Gasket Leakage
Excessive Ball Seal Leakage
Other

Actuator Mounting

The open and closed travel stops of the actuator may require adjustment if the bonnet­to­body or bonnet-to-actuator
joint is loosened. If the actuator is removed for packing replacement, remount the actuator per the this section. If the
bonnet­to­body or bonnet-to-actuator joint is loosened for any reason, establish the zero position per the Actuator
Adjustments section of this manual.
1. Prior to actuator installation, install shaft key (key 15) on drive shaft key slot.
2. Drive spring pin (key 102) into coupler (key 101).
3. Install coupler (key 101) over drive shaft (key 8), holding shaft key (key 15) in place.
4. Drive spring pin (key 104) into yoke key (key 103).
5. Install yoke key (key 103), with the spring pin (key 104) toward the drive shaft (key 8), onto the coupler (key 101).
This yoke key will need to be held in place while lowering actuator onto shaft.
6. Lower the actuator over the drive shaft (key 8) and onto the bonnet (key 7). Ensure the actuator and bonnet
mounting surfaces remain parallel to prevent binding. A long metal rod or screwdriver can be used to hold the yoke
key (key 103) in place until it is fully seated into actuator.
7. Lubricate with Nuclear Grade anti-seize lubricant (key 36) and install 8 3/4­10x2.62 hex cap screws (key 18)
finger-tight through the bonnet (key 7) into the actuator. Now rotate the entire actuator counter­clockwise (ccw)
as far as the bolted joint will allow. This will bias the actuator slightly, relative to the valve pipe run; this is
acceptable.
Note
Step 7 is essential to ensure the valve is always returned to the same closed position after removing the actuator and replacing the
packing.
8. With the actuator rotated counter­clockwise on the bolted joint, tighten the cap screws (key 18) to an initial torque
of 136 N•m (100 lbf•ft) and a final torque of 271 N•m (200 lbf•ft). Tighten the bolted joint using a criss­cross
pattern illustrated below in figure 11. Tighten each bolt evenly and in the sequence described.
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Verify the correct packing load. Use gap gage to verify correct gap distances.
Disassemble and inspect packing box bore and drive shaft for graphite adhesion, excessive wear or scratches.
If needed, increase packing load to maximum per the Packing Adjustment section of this manual.
Replace packing parts and inspect packing box and shaft at next available maintenance interval.
Verify proper torque on bottom flange studs and nuts in Assembly section of this manual.
Disassemble and inspect sealing surfaces on the bottom flange and valve body for scratches or nicks.
Verify the ball is positioned correctly in the closed position.
Reference the Actuator Adjustments section of this instruction manual.
Disassemble and inspect thrust washer (key 1), drive bearing (key 2), ball (key 8A), bearing follower (key 9),
seal ring (key 25), and special thrust washer (key 28) for excessive wear or scratches.
Consult your Emerson sales office.
Instruction Manual
Possible Solution
D103565X012