Pneumatic Rack and Pinion Actuators

Bettis Rack and Pinion Pneumatic Actuators offer reliable torque to automate valves for a wide range of industrial applications from big to small, hot to cold, general to severe.

What is a Rack and Pinion Actuator?

Rack and pinion actuators are mechanical devices used to automatically open and close valves or dampers, usually for industrial applications.
“Rack and pinion” is a generic term for a pair of gears which convert linear motion into rotational motion. A linear gear bar called “the rack” engages teeth on a circular gear called "the pinion". The linear force exerted on the rack will cause rotational motion of the pinion.
For valve automation, a common actuator design uses two piston-type racks moving in opposite directions to ensure balanced forces on the pinion. Typically, pneumatic air pressure is used to power the actuator. By applying pressure to the piston racks, the pinion can be turned to the desired position. The pinion bottom connects to the valve stem to open and close the valve as the pinion turns.

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Bettis RPE-Series Rack & Pinion aluminum actuator

Resources

Bettis RPE Series Brochure

Dependable Performance For The Toughest Environments

Bettis RPE Series Data Sheet

The standard Bettis RPE-Series actuator can be operated with natural gas. The natural gas should be qualified as "Sweet" and "Dry" (a.k.a. "Pipeline quality").

Bettis RPE-Series Pneumatic Actuators

Workhorse rack & pinion actuator is long lasting and durable for tough applications. Powder-coated cast aluminum body and high-grade aluminum pinion offer exceptional durability and corrosion resistance in a compact and light weight actuator.

Bettis Q Series Brochure

Offers a new way of looking at valve automation by combining field-proven rack and pinion pneumatic actuator with the necessary controls in an integrated modular package.

Bettis Q Series Data Sheet

The Bettis Q-Series package consists of an actuator with a module for control and position feed back and forms an integrated concept for “On/Off” valve automation.