Flowserve MX-85 Actuator - Manual (Page 42)

Flow Control
Limitorque Actuation Systems
34 MX-85/140 Maintenance and Spare Parts FCD LMAIM1341-00
4.5 Baseplate Type B4
Table 4.6 – Type B4 Baseplate Parts List
Part Number Description Qty.
11-1 Baseplate 1
11-3 Seal-Quad Ring 1
11-4 O-ring 1
11-5 Socket Head Cap Screw 8
Figure 4.6 – Type B4 Baseplate
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Stem Nuts (B4, B4E, and BL) Various stem nuts are
used with the B4 baseplate:
1. B4 stem nut with variable bore and key
2. B4E stem nut for extended reach and variable
bore and key
3. BL stem nut (6 or 36 splines)
The B4 stem nut is secured by a snap ring and the
B4E and BL stem nuts are secured by a spiral-
wound ring. Reference the MX Installation Manual
LMAIM1306 for more information about stem
nut options.
Typical MX actuator with standard B4 stem nut and snap ring