M Motor Actuators
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Y20EBD Valve Linkage for M100 Motor Actuators 9
• High position for stem lengths from 4 inches to 5-7/8 inches
(101.6 to 147.2 mm) in full up position. V90CA valves from 4 inch
through 6 inch (101.6 through 152.4 mm) pipe sizes.
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Y20A1-05
Figure 5: Long and Short Stem Valve Bodies
The left side of Figure 5 shows a Y20EBD Valve Linkage in the high
position connecting a 3-way valve body with a long stem to a M100 Motor
Actuator for stem up operation.
The right side of Figure 5 shows a Y20EBD Valve Linkage in the low
position connecting a 2-way valve body with a short stem to a M100
Motor Actuator for stem up operation.
Except for M100C (reverse acting) and M100H models, with an increasing
signal, the actuator always operates Clockwise (CW) from its zero
mechanical position. This clockwise rotation can be used to drive the
valve stem up or down, depending on the way the gear housing is attached
to the actuator.
To determine the direction of actuator drive:
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Direction of
Drive Rotation
Y20D1-06
Figure 6: Motor Actuator and Valve
Direction
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