Manualshelf

Data Sheet

ManualsBrandsEmerson ManualsControl ValvesEmerson Fisher GX
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GX Control Valve and Actuator
D103171X012
Product Bulletin
51.1:GX
March 2012
25
Manual Handwheels
The GX is available with an optional, side-mounted
manual handwheel (see figure 22). These handwheels
provide a robust method of manually operating the
valve in an emergency or upon loss of instrument air.
TheGXhandwheelwillstrokethevalveupto20mm
travel, and is available on the size 225 and 750
actuators. Dimensions are provided in figure 23 and
table 23.
When mounted to a fail-up actuator, rotating the
handwheel clockwise moves the stem downwards.
When mounted to a fail-down actuator, turning the
handwheel in the clockwise direction causes the stem
to move upwards. Disengagement of the handwheel
to allow automatic operation is accomplished by
simply rewinding the handwheel.
Figure 22. Fisher GX Control Valve and Actuator System with Manual Handwheel
W9025