2 sb-0, 1 sb-0 disassembly/stem nut removal – Flowserve SMB Series Electric Actuators User Manual
Page 84
SMB Series/SB Series Installation and Maintenance FCD LMENIM1401-04-AQ – 01/15
84
Table 8.1 – SB-00 Parts List
Piece
Quantity
Description
122
1
Housing Cover Gasket
123
1
Spring Cartridge
124
1
Thrust Washer
125
1
Locking Nut
126
1
Socket Head Set Screw
130
6
Socket Head Cap Screw
131
6
Lockwasher
153
4
Hex Head Cap Screw (not shown)
154
2
Socket Head Cap Screw
155
4
Lockwasher (not shown)
156
1
Handwheel Key
158
4
Hex Head Cap Screw
159
6
Lockwasher
160
1
Shim Set
179
1
Socket Head Set Screw
185
2
Lifting Eye Bolt
186
2
Hex Nuts
8.2 SB-0
c
WARNING: See Section 4.1 and 4.2 on Safety Precautions and Safety Practices before
proceeding with disassembly.
c
WARNING: Extreme caution should be used in the disassembly and reassembly of the spring
compensator assembly. The compensator springs may be compressed (under load) even though
the line pressure has been removed from the valve and power is disconnected. Be sure that the
spring compensator indicator in the Spring Housing points to zero before beginning disassembly.
Remove the Spring Housing bolts by turning each bolt in order around the housing no more than
1/4 turn at a time.
The SB-0 actuator is a basic SMB-0 actuator with the housing cover, drive sleeve, and locknut
modified to provide spring compression to the stem nut. The disassembly/reassembly procedure for
the SMB-0 is applicable (Section 7.3.1, SMB-0, 1, 2, 3 and 4 Disassembly and Section 7.3.3, SMB-0,
1, 2, 3 and 4 Reassembly), with the following procedures replacing Step 11 and stem nut removal
procedure.
8.2.1 SB-0 Disassembly/Stem Nut Removal
Piece numbers refer to Figure 8.2.
1. Remove Spring Housing (piece #3).
2. Remove Thrust Sleeve Bearing Cartridge (piece #106). The Belleville Spring (piece #109) and
Belleville Spring Shim (piece #108) will come off with the Thrust Sleeve Bearing Cartridge (piece
#106).
3. Remove Thrust Sleeve (piece #107), being careful not to loosen or damage O-Ring (piece #94).
The Bearing Cup (piece #116) will come out with the Thrust Sleeve (piece #107).