Preparing the stem nut, Type “b” bases: torque-only applications – Flowserve MX Accutronix User Manual

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LMENIM2312 • Accutronix MX Quick Mounting Instructions

Flow Control

Limitorque Actuation Systems

Preparing the Stem Nut

The Accutronix MX has two (2) basic base designs:
• Torque-only base, designated by a “B” prefix
• Thrust-only base, designated 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 machined to fit a
valve or gearbox.

A B4E torque nut can be provided and may be installed to allow for

extended stem acceptance.

B4 base

B4E base

Exploded view of B4/B4E base

Torque nut

Retaining ring

Baseplate

Accutronix MX

base

Drive sleeve

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