Fisher® 10080 pages

Product Bulletin
61.8:1008
D100106X012
December 2009
1008 Handwheel Actuator
Fisherr 1008 Handwheel Actuator
The Fisher 1008 manual handwheel actuator is used
in applications that require a throttling type of control
valve that can be manually operated and set. This
actuator can be used on nearly all standard
globe-style or angle-style control valve body
assemblies. No special valve body adaptor is
required for use with the 1008 actuator, so that future
conversion from manual to automatic control can be
accomplished at minimum cost.
The 1008 actuator is capable of giving precise
manual throttling control. A travel indicator mounted
on the actuator yoke provides a visual indication of
valve plug position at all times. A dial type valve plug
position indicator is also available as optional
equipment.
Features
D Easy to Install and Maintain—For sizes 30,
40, and 50, the yoke is attached to the valve body
with a forged steel hammer locknut (figure 2 shows a
typical locknut attachment). For the size 80
(figure 1), the yoke is bolted to the valve body. The
handwheel mechanism on all sizes is totally
enclosed.
D Easy to Operate—Regardless of the valve
plug action, counterclockwise rotation of the
handwheel always opens the valve. In size 40 and
larger, two ball bearings are used in the handwheel
assembly to facilitate rotation. A spring loaded ball
detent in the handwheel prevents it from rotating due
to vibration.
D Accurate Valve Plug Positioning—The valve
stem does not revolve, assuring the same seating
surface with each full stroke. Also, the yoke
construction ensures that the force required to turn
the handwheel cannot be transmitted to the valve
body. Sizes 30, 40, and 50 actuators can be
furnished with a Tejax Model A35 valve position
indicator (figure 3). This indicator enables you to turn
the handwheel to the desired position without
guesswork. The dial on the indicator is divided into
turns and fractions of turns so that you can return to
a predetermined valve setting quickly and easily.
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W0590Ŧ1/IL
Figure 1. Fisher 1008, Size 80 Actuator