Actuation
Manual Operation
The A-Series 530 lb-in actuators have a declutchable, manual override system. To
manually operate the actuators, push in the manual override button and rotate the
declutchable lever counter-clockwise until it reaches the 12 o’clock position. Once the
declutchable lever is in position, turn the handwheel until the valve reaches the
required position. The motor does not shut off during manual operation and will
continue to rotate the upper gearing if being commanded by the process. Push in the
manual override button and rotate the declutchable lever clockwise until it reaches the
3 o’clock position to re-engage the upper gearing and motor drive.
A label on the handwheel hub warns users not too exceed a specific “rim pull” force
for each actuator size.
If the “rim pull” force (68 lbs) is exceeded, the roll pin securing the handwheel onto
the manual override shaft is designed to shear, which prevents serious internal gear
damage.
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