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Accutronix MX Quick Mounting Instructions  •  LMENIM2312

Flow Control 

Limitorque Actuation Systems

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.

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.

Checking the Settings

When the assembly of the actuator to the valve is complete, the actuator
position limits may be set. Please refer to 

LMAIM2310, Quick Start-Up

Instructions

, for calibration of valve/actuator position limits.

Summary of Contents for Limitorque Accutronix MX

Page 1: ...Limitorque Actuation Systems FCD LMENIM2312 00 Limitorque Accutronix MX Quick Mounting Instructions...

Page 2: ......

Page 3: ...of valve position limits LMAIM2306 Installation and Operation Manual complete installation instructions Contents Preparing the Stem Nut 4 Type B Bases Torque only Applications 4 Standard B4 B4E Base...

Page 4: ...ed by an A prefix Type B Bases Torque only Applications Standard B4 B4E Base The standard MX actuator base is the B4 torque only and includes a mounting plate and steel torque nut which may be machine...

Page 5: ...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 th...

Page 6: ...may be bolted directly to the actuator The thrust base contains a bronze alloy thrust nut that may be machined to suit the valve stem An A1E thrust nut can be provided and may be installed to reach s...

Page 7: ...ust base and remove pilot MX 20 40 Turn counterclockwise CCW and remove Thrust bearing and nut removal 1 Remove the first set of thrust washers and bearing 2 Remove stem nut NOTE The thrust washers be...

Page 8: ...ntil pilot is tight Disassembly Unit MX 85 Refer to the figure on page 9 Disassembly of the main housing from the base may be recommended to allow the base to remain on the valve if the actuator must...

Page 9: ...NOTE Order of assembly for thrust washers and bearing must be as follows washer thrust bearing washer Thrust baseplate installation Mount baseplate to thrust base housing and install the six socket he...

Page 10: ...emain on the valve if the actuator must be removed for service Pilot removal Remove the two screws and washers holding the valve pilot to the thrust base and remove pilot Thrust bearing and nut remova...

Page 11: ...plicable for MX 85 or 140 Steel alloy splined nuts are provided to a standard involute spline category for rising and rotating stem valves per customer requirements Disassembly and reassembly is the s...

Page 12: ...Bases Torque only Refer to the figures on pages 4 6 1 Ensure the torque nut is secured inside the actuator drive sleeve with the retaining ring 2 Lower the actuator onto the valve or gearbox stem Alig...

Page 13: ...all the bolts to secure the actuator to the thrust base assembly 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 bas...

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Page 16: ...contained herein is to be construed as a warranty or guarantee express or implied regarding any matter with respect to this product Because Flowserve is continually improving and upgrading its produc...

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