FCD LMENIM2312-00
Limitorque Actuation Systems
Limitorque®
Accutronix MX
Quick Mounting Instructions
Flow Control
The Limitorque Accutronix MX is the technological leader among electric actuators and the simplest device to install and commission. Follow this simple step-by-step installation guide to install the MX on all valve types. Refer to the following documents for more set-up information:
•LMAIM2310, Quick Start-Up Instructions calibration of valve position limits
•LMAIM2306, Installation and Operation Manual complete installation instructions
Limitorque Actuation Systems
Contents
Preparing the Stem Nut |
4 |
Type “B” Bases: Torque-only Applications |
4 |
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Standard B4/B4E Base |
4 |
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Optional B1 Base (not applicable for MX-85 or -140) |
5 |
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Type “A” Bases: Thrust-only Applications |
6 |
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Standard A1/A1E Base |
6 |
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Type “BL” Drive: Splined-drive Applications (not applicable for MX-85 or -140) |
11 |
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Mechanical Installation of MX Actuator onto Valve or Gearbox |
11 |
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Mounting (Type “B” Bases): Torque-only |
12 |
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Removal (Type “B” Bases): Torque-only |
12 |
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Mounting (Type “A” Bases): Thrust-only |
12 |
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Removal (Type “A” Bases): Thrust-only |
13 |
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Checking the Settings |
13 |
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Accutronix MX Quick Mounting Instructions • LMENIM2312 |
3 |
Flow Control
Limitorque Actuation Systems
Preparing the Stem Nut
Exploded view of B4/B4E base
The Accutronix MX has two (2) basic base designs:
• Torque-only base, designated by a “B” prefix |
Baseplate |
Drive sleeve |
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• Thrust-only base, designated by an “A” prefix |
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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 machined to fit a valve or gearbox.
A B4E torque nut can be provided and may be installed to allow for
extended stem acceptance. Accutronix MX base
B4 base |
B4E base |
Torque nut
Retaining ring
4 |
LMENIM2312 • Accutronix MX Quick Mounting Instructions |
Flow Control
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 LMASS2326, MX Performance and Dimensions for maximum stem capacity). Ensure sufficient clearance for a smooth, sliding fit.
Reassembly
Limitorque Actuation Systems
Optional B1 Base (not applicable for MX-85 or -140)
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.
Disassembly
No disassembly is required since the torque nut has been machined to an international standard. Clean the bore and lightly grease.
B1 base
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).
Accutronix MX Quick Mounting Instructions • LMENIM2312 |
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