PAGE B17
6. Connect the actuator piping.
7. Apply air pressure to the diaphragm to slide the rod end
into the link arm slot; secure the rod end in place by installing
the shoulder screw.
8. Apply the minimum amount of air pressure necessary to
stroke the actuator so the link arm just contacts the stop.
9. Position the stub shaft as shown in Figure 4. Turn the stub
shaft only, not the link arm.
10. Tighten the screws to clamp the link arm to the valve
shaft.
11. Make sure the stub shaft 0-ring is in place, then place the
gasket and cover on the housing.
COUPLING CLAMP SCREWS
(Size 40 only)
FIGURE 4
ACTUATOR
MOUNTING
POSITION OF HOLE IN LINK ARM IN
ACTION
POSITION
RELATIONSHIP TO SEAT END OF VALVE
DIRECT
Standard
1 Tooth Counterclockwise from 6 o’clock
DIRECT
90º
1 Tooth Counterclockwise from 9 o’clock
DIRECT
180º
1 Tooth Counterclockwise from 12 o’clock
DIRECT
270º
1 Tooth Counterclockwise from 3 o’clock
REVERSE
Standard
1 Tooth Counterclockwise from 12 o’clock
REVERSE
90º
1 Tooth Counterclockwise from 3 o’clock
REVERSE
180º
1 Tooth Counterclockwise from 6 o’clock
REVERSE
270º
1 Tooth Counterclockwise from 9 o’clock
CORRECT POSITION OF LINK ARM ON VALVE SHAFT
FIGURE 5
ACTUATOR MOUNTING POSITIONS
STANDARD
90º
180º
270º
SEAT
END
SEAT
END
SEAT
END
SEAT
END
