OpRPA™ High Performance Rack & Pinion Actuator

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The Trimteck OpRPA High Performance Rack & Pinion Actuator has been designed for automating V-Notch Ball, Trunnion Ball, Eccentric Plug, Butterfly, Custom-Engineered Rotary Valves, and Dampers. Contrary to the long-held view that rack and pinion actuators do not provide sufficient resolution to accurately position a plug or ball in a control valve, there have been significant advancements in the design and manufacturing process of some rack and pinion actuators so that they now provide precise control and high resolution – all at a reduced cost when compared to piston-cylinder or diaphragm rotary actuators.

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Actuator Type

Actuator Materials


Base Valve Type

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Air Supply (PSI)

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Operating Temperature (F)

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Torque Range

Travel Adjustment

Failure Position

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Actuator Options


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