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Part-turn gearboxes

 

AUMA part-turn gearboxes are used wherever a 90° swivel movement is required for the operation of a valve or damper.

OPEN-CLOSE or modulating duty

Class A: OPEN-CLOSE duty. The actuator is required to drive the valve through its entire travel from the fully open position to the fully closed position or vice versa.

Class B: Inching/positioning or positioning duty. The actuator is required to occasionally drive the valve to any position (fully open, intermediate and fully closed).

Class C:Modulation or modulating duty. The actuator is required to frequently drive the valve to any position between fully open and fully closed.

Part-turn gearboxes