OpRPA™ High Performance Rack & Pinion Actuator
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.
The OpRPA is enclosed in a precision-extruded anodized aluminum body and has a one-piece nitride-coated pinion gear. They are designed for 100-degree travel with clockwise and counterclockwise travel adjustment for open and closed positions. Moreover, the OpRPA is convertible to a double acting or a spring return simply by removing or adding springs.
- Internal/External Corrosion Protection
- Honed Cylinder Surfaces for Low Coefficient of Friction
- High Cycle-Life
- Field Reversible
- EDM Machined Racks and Gear for Low Backlash and High Efficiency/Precise Control
Specifications
| Actuator Type | High Performance Rack & Pinion |
|---|---|
| Base Valve Type | V-Notch Ball, Eccentric Plug, Trunnion Ball, Butterfly, Custom-Engineered/Specialty |
| Industries | Aerospace & Defense, Chemical/Petrochemical, Food & Beverage, Industrial Gases, Metals & Mining, Oil & Gas, Power, Pulp & Paper, Refining |
| Product Groups | Rotary Pneumatic Actuators |
| Actuator Materials | Extruded Aluminum ASTM 6005 (Stainless Steel Optional) |
| Actuator Options | Declutchable Hand Wheel |
| Air Supply (PSI) | Double Acting 29 to 116, Max Allowable 145, Spring Return 29 to 116 |
| Failure Position | Air-to-Close, Air-to-Open, Fail-Last |
| Operating Temperature (F) | High Temp 5 to 302, Low Temp -31 to 175, Standard -4 to 175 |
| Torque Range | 25 in-lbs to 58,000 in-lbs |
| Travel Adjustment | +/- 4 Degrees |
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