Flowserve MX Electronic Actuator - Manual (Page 22)

Limitorque MX Electronic Actuator FCD LMENIM2306-06 – 10/13
22
3.2.1 Mounting (Type “B” Bases): Torque-only
Refer to Figures 3.1 - 3.5.
1. Ensure torque nut is secured inside actuator drive sleeve with retaining ring.
2. Lower actuator onto the valve or gearbox stem. Align the stem nut key and keyway with valve or gearbox stem key
seat.
3. Verify that the actuator and valve mounting adapter flanges mate correctly.
4. Secure the actuator to the valve mounting adapter with mounting bolts.
3.2.2 Removal (Type “B” Bases): Torque-only
Refer to Figures 3.1 – 3.5.
1. Remove the bolts that secure the actuator to the valve mounting adapter. If type B1 base is used in addition to the
standard type B4 baseplate, you may leave the B1 base attached to the actuator and remove as a unit.
2. Lift the actuator from the actuator mounting adapter.
3.2.3 Mounting (Type “A” Bases): Thrust-only
Refer to Figures 3.6 – 3.9.
1. The following are two options for mounting the type A base actuator:
a. If the type A thrust base was removed from the valve mounting adapter, replace the thrust base onto the valve
mounting adapter. Ensure the thrust base stem nut has the lugs positioned upward to engage with the drive
sleeve slots when the actuator is reinstalled. Rotate the bronze nut while holding the base steady.
or
b. If the thrust base is installed on the valve mounting adapter, proceed to step two.
2. Lower the actuator along the threaded valve stem and onto the valve mounting plate. Ensure the thrust base stem
nut lugs properly engage and align with the drive sleeve slots.
3. Install the bolts to secure the actuator to the thrust base assembly.
3.2.4 Removal (Type “A” Bases): Thrust-only
1. Remove the bolts that secure the actuator to the thrust base assembly.
2. Remove the type A thrust base by removing the bolts that secure the actuator to the valve mounting adapter.
or
Leave the type A thrust base mounted to the valve mounting adapter until ready to remount the actuator. The thrust
base will maintain valve position provided that the valve stem threads are locking.
3. Lift the complete actuator from the thrust base.