Flowserve SMB Series Electric Actuators - Manual (Page 81)

81
SMB Series/SB Series Installation and Maintenance FCD LMENIM1401-04-AQ – 01/15
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NOTE: Note the arrangement of the Belleville Springs.
4. If the actuator is mounted on the valve, place the actuator in manual operation. Rotate the
Handwheel (piece #99) in the direction to effect a downward movement of the stem (usually the
closed direction) until the compensator Ball Bearing (piece #81) stops rising.
5. Lift out the Thrust Adapter Sleeve (piece #120), and Bearing (piece #81).
6. If the actuator is not on a valve, the Stem Nut (piece #8) will lift out.
7. Remove Bevel Gear Housing (piece #96) as an assembly complete with side-mounted handwheel
assembly.
8. To remove Drive Sleeve Assembly, proceed as in Section 7.2.2, SMB-00 Disassembly.
8.1.2 SB-00 Reassembly/Stem Nut Installation
Piece numbers refer to Figure 8.1.
1. If actuator is not on the valve, drop the Stem Nut (piece #8) in place and ensure that splines
engage properly.
2. If actuator is on the valve, thread the Stem Nut onto the stem until the splines hit.
3. Replace the Bevel Gear Housing (piece #96) assembly as removed in Step 7 of Section 8.1.1,
SB-00 Disassembly/Stem Nut Removal.
4. Place the actuator in manual operation and rotate the Handwheel (piece #99) in the direction to
effect an upward movement of the stem (usually the opening direction). Continue rotating until
the stem begins to move upward.
5. Remove Bevel Gear Housing (piece #96).
6. Install Thrust Adapter Sleeve (piece #120) and Bearing (piece #81). Ensure O-Ring (piece #116)
is properly installed.
7. Clean the bottom surface of the mounting flange for the Bevel Gear Housing (piece #96) and
Housing (piece #1).
8. Place Bevel Gear Housing in position without any gasket between it and the Housing (piece #1).
9. Measure the gap between the Bevel Gear Housing and the Housing.
10. Install Bevel Gear Housing Gasket (piece #107) of the same thickness as the gap measured in
Step 9 and install Bevel Gear Housing (piece #96)
NOTE: Allow for the compressibility of the gasket material. If the exact thickness gasket is not
available, use the next larger thickness.
11. Install Spring Cartridge (piece #123), complete with Thrust Washer (piece #124), Belleville
Springs (piece #108), O-Ring (piece #117), and Quad-Ring (piece #118).
NOTE: The springs should be stacked in the same fashion as was noted in Step 3 in Section 8.1.1,
SB-00 Disassembly/Stem Nut Removal. The standard arrangement has the Belleville Washers stacked
in pairs. See note after step 12 for optional configuration.
12. Install Locking Nut (piece #125) and tighten until it is snug against the Belleville Springs. See
NOTE below. Secure by tightening Set Screw (piece #126).