Emerson Fisher 1079 User Manual

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Fisherr 1079 Declutchable Manual Actuator
The 1079 manual actuator is a declutchable unit for
manual operation of keyed or square shaft control
valves and equipment that use a Hytork actuator. The
1079 manual actuator mounts directly on the Hytork
actuator and can be engaged to allow manual
operation of the valve when the power actuator is not
in use or disengaged to allow automatic operation of
the valve by the power actuator. The mechanism used
allows manual actuator engagement at any point of
poweractuatorrotation.
Features
Direct Attachment to the Power Actuator-- Direct
mounting to the actuator housing simplifies
installation and eliminates the need for yokes and
other brackets.
Engage Manual Actuator At Any Point of Rotation--
A lever-operated eccentricbearingsupportonthe
input shaft allows engagement of the worm gear
with the sector at any point of rotation.
W6214
Fisher 1079 Manual Actuator Mounted on a
Hytork Actuator and A41 Valve
Positive Operation-- The disengagement lever is
held in both the engaged and disengaged positions
by a spring-loaded pin, which must be released
before the lever can be moved. This reduces the
possibility of inadvertent or accidental operation. In
addition, stop-pins at the fully engaged and fully
disengaged positions provide positive limits for
lever travel.
1079 Manual Actuator
D500209X012
Product Bulletin
22.2:1079
January 2013