10 M Motor Actuators
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Y20EBD Valve Linkage for M100 Motor Actuators
1. With the motor actuator next to the valve, view the motor actuator
from the load end.
2. Determine the type of valve being used and the direction that will be
required to drive the stem from its initial position.
• Stem Up Two Way Valve--Drive Down to Close
• Stem Up Two Way Valve--Drive Down to Open
• Stem Down Two Way Valve--Drive Up to Open
• Stem Down Two Way Valve--Drive Up to Close
• Stem Up Three Way Valve
• Stem Down Three Way Valve
Load End
Load End
Y20A1-07
Figure 7: Stem Up/Drive Down and Stem Down/Drive Up
3. For valves with the stem in the initial up position, the hole in the yoke
will be to the right of center when facing the load end as shown in the
left illustration of Figure 7.
For valves with the stem in the initial down position, the hole in the
yoke will be to the left of center when facing the load end as shown in
the right illustration of Figure 7.
The brackets are assembled at the factory in the low position and for stem
up/drive down valve application with the hole in the yoke to the right of
center as shown in the left illustration of Figure 7.
For any other application, the yoke and brackets must be disassembled and
reassembled for the specific application as described below.
Screw
Left Side
Bracket
Right Side
Bracket
Nut
Washer/
Yoke
Y20D1-O8
Figure 8: Bracket Components
Changing Yoke
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