6
Series 70 Electric Actuator
Operation and Maintenance Manual
Close Travel Switch Adjustment
1. Loosen the mechanical stop for the closed position
and back it off so that it does not interfere with
actuator travel (closed stop located on right when
viewed from travel stop side of actuator).
2. Remove the indicator rotor by pulling up it straight
up away from the indicator shaft. This will expose
the machined groove on the end of the cam shaft,
which is the reference to the valve disc position.
NOTE: For Housing Size 180, ignore steps 2 and 6. The
valve position indicator plate on the lower gearbox is
the reference to the valve position.
3. Manually operate the actuator handwheel clockwise
until the valve reaches the desired fully closed
position.
4. Rotate the red adjusting knob by hand or with a flat
head screwdriver until the cam lobe just activates
(depresses) the switch from a clockwise direction.
NOTICE: All continuous duty actuators have a cam
locking screw. Cam locking screw must be slackened
before cam adjustments and re-tightened after cam
adjustments.
NOTE: It is possible that the rotation of one cam will
move the other cam. If this occurs, hold the other
knobs or cams during adjustment.
“OPEN” CAM
LOWER RED
“CLOSE” CAM
POT DRIVE GEAR
“BLACK” NOT SHOWN
FOR CLARITY REASONS
CAM ADJUSTMENT KNOB
(ONLY ADJUST IF LOCKING
SCREW IS SLACKENED)
CAM
LOCKING
SCREW
5. With the travel switch in the closed position, rotate
the handwheel clockwise ½ turn for Housing Size
6, 1 turn for Housing Size 12, ½ turn for Housing
Size 30, and 2 turns for Housing Size180. Adjust the
closed travel stop bolt until it bottoms against the
output gear and lock it in position with the locknut.
6. After all travel switch adjustments have been
completed, replace the indicator rotor and secure
the actuator cover.
Open Travel Switch Adjustment
1. Loosen the mechanical stop for the open position
and back it off, so that it does not interfere with
actuator travel. The open stop is located on the
left, when viewed from travel stop side of actuator.
2. Remove the indicator rotor by pulling it straight
up away from the indicator shaft. This will expose
the machined groove on the end of the cam shaft,
which is the reference to the valve disc position.
NOTE: For Housing Size180, ignore steps 2 and 6. The
valve position indicator plate on the lower gearbox is
the reference to the valve position.
3. Manually operate the actuator handwheel
counterclockwise until the valve reaches the desired
open position.
4. Rotate the green adjusting knob until the cam
lobe just activates (depresses) the switch from a
counterclockwise direction.
NOTICE: All continuous duty actuators have a cam
locking screw. Cam locking screw must be slackened
before cam adjustments and re-rightened after cam
adjustments.
NOTE: It is possible that the rotation of one cam will
move the other cam. If this occurs, hold the other
knobs or cams during adjustment.
5. With the travel switch in the open position, rotate
the handwheel counterclockwise ½ turn for Housing
Size 6, 1 turn for Housing Size 12, ½ turn for Housing
Size 30, and 2 turns for Housing Size 180. Adjust
the open travel stop bolt until it bottoms against the
output gear and lock in position with the locknut.
6. After all travel stop adjustments have been
completed, replace indicator rotor and secure the
actuator cover.
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