Emerson Bettis M Series - Section 7: Failure Mode Change - Spring Return; Failure Mode Adjustment

July 2019
Installation, Operation and Maintenance Manual
MAN-02-01-39-0704-EN Rev. 0
Failure Mode Change
Section 7: Failure Mode Change -
Spring Return
(Models 003-100) Symmetric Yoke Actuators Only
Conversion from "fail close" to "fail open" is accomplished by ipping the actuator over (i.e.
left to right). The top and bottom of the center housing have identical mounting anges
and output shaft dimensions. Remove the vinyl pointer and indicator plate and mount
them on opposite side of actuator.
(Models 023-2380) Canted and Symmetric Yoke Actuators (Except Noted Above)
Conversion requires removal of the spring cylinder assembly and reinstallation on the other
side of the housing. It is recommended that fail open and fail closed be ordered from
the factory.
12
Section 7: Failure Mode Change