Flowserve MX Electronic Actuator - Manual (Page 16)

Limitorque MX Electronic Actuator FCD LMENIM2306-06 – 10/13
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Figure 3.2 – B4E base
Figure 3.3 – Exploded view of B4/B4E base (MX-05 shown)
Torque nut
Retaining ring
Baseplate
MX base
Drive sleeve
Disassembly
1. Remove the retaining ring (B4 base) or spiral-wound ring (B4E base) that retains the torque nut in the drive sleeve.
2. Remove the torque nut. If the torque nut is difficult to remove, insert a suitable device into the drive sleeve through
bore and gently tap it loose from the handwheel end.
3. Machine the torque nut to suit the valve stem or gearbox input shaft (see LMENSS2326, MX Performance and
Dimensions for maximum stem capacity). Ensure sufficient clearance for a smooth, sliding fit.
Reassembly
1. Clean the torque nut thoroughly and lightly grease.
2. Replace the torque nut in the drive sleeve. Ensure the torque nut meshes with the drive lugs.
3. Refit the retaining ring (B4 base) or spiral-wound ring (B4E base).
Optional B1 Base (not available for MX-85, MX-140 and MX-150)
An optional torque base assembly may be added to allow for a greater stem acceptance. This base is supplied with a
fixed bore and key as defined by ISO 5210.