20 M Motor Actuators
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Y20EBD Valve Linkage for M100 Motor Actuators
Figure 20: Lower Visual Guide Indicating Full Up Travel
6. As shown in Figure 20, the edge of the lower flat washer should
appear opposite the notch in the lower visual indicator to indicate
compression of the spring with the valve seated.
7. Refer to the technical bulletin provided with the motor actuator and
adjust the actuator travel for the full lift as described in the Valve Lift
section.
For stem down valves, make certain that the rack is assembled to the left
of the gear housing.
Drive Up to Close Valves
1. Manually move the rack and spring housing assembly, connected to
the valve stem, to the full down position.
2. Insert the pinion gear into the gear housing with the square hole over
the actuator shaft.
3. Replace the gear cover and tighten the gear cover screws.
4. Refer to the technical bulletin provided with the motor actuator and
adjust the actuator travel to drive the stem up and compress the spring
in the housing (turn power off when adjusting the M100A slide stop).
5. When the edge of the lower flat washer is opposite the notch in the
lower visual guide, the travel is properly adjusted. This represents
0.1 inch (2.54 mm) compression of the spring with the valve seated.
Drive Up to Open Valves
1. Power the actuator to position the actuator 15° from zero. This is
equivalent to 0.1 inch (2.54 mm) of stem travel.
2. Hold the rack in its full down position.
3. Insert the pinion gear into the gear housing with the square hole over
the actuator shaft.
4. Replace the gear cover and tighten the gear cover screws.
5. Allow the actuator to return to zero position. The edge of the upper
flat washer should appear opposite the notch in the upper visual
indicator to indicate compression of the spring with the valve seated.
6. Refer to the technical bulletin provided with the motor actuator and
adjust the actuator travel for full lift as described in the Valve Lift
section.
Stem Down Two
Way Valves
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