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DESIGN AND CONSTRUCTION

ADVANTAGES
RPC-Series actuators offer many significant features and benefits, among these are:

• BettiGuard - an advanced, highly corrosion resistant surface conversion process which combines hard anodizing with fluoropolymer code-position to protect the aluminum housing inside and out with an extremely hard wear resistant layer. This process, applied after finished machining, ensures that all housing surfaces are fully protected from hostile environments.

  End caps are polyester powder coated, providing excellent corrosion protection.

  All external metal fasteners are 300 series stainless steel.

• NAMUR Mounting - RPC Series meets the latest NAMUR standards allowing direct or close coupling of NAMUR desinged accessories. The pinion gear interface features a positive, international standard drive for positioners, switches and other accessories. The solenoid interface allows direct acceptance of any NAMUR designer controls valves.
• Bi-directional Travel Adjustments - Bettis RPC-Series actuators feature bi-directional pinion travel stops. Side located stops allow a full +/-5^o of valve travel adjustment, giving a guaranteed range of adjustment between 80^o and 100^o of actuator travel. These travel stops are designed to absorb the maximum rated torque of the actuator and the maximum impact loads associated with recommended stroke speed.
• Extended Cycle Life - Replaceable upper and lower pinion gear, piston head and heel bearings are made from an internally lubricated thermoplastic. This material contributes significantly to extended cycle life, wear resistance and efficiency.
• Blow-out Proof Pinion Gear - In addition to the stainless steel retaining ring, the RPC pinion gear features a unique internal safety ring.
• Serviceability and Confidence - Bettis rack and pinion actuators are designed to be safe, simple and rugged. Unlike other rack and pinion actuators, servicing the RPC actuator does not require special tools.
• Modular - The modular design of the RPC-Series simplifies the conversion from double-acting or spring return configurations.
• ISO/DIN Valve Interface - The imperial and metric RPC output drive features a female, double square (eight point pattern) as standard. Optional output drive configurations are available. The ISO centering interface of female groove is standard on the metric models. The centering ring is available as an option.
• Operating Ranges - RPC-Series double-acting actuators produce guaranteed minimum torque outputs up to 16,500 lb-in (1,865 Nm). The spring-return units produce spring ending torques up to 5,150 lb-in (582 Nm).*

  RPC-Series pneumatic actuators are suitable for continuous operation pressures ranging from 40 to 120 psig (3 to 8 BAR) while exposed to temperatures of -40^oF to +180^oF (-40^o to + 82^oC). Optional temperature trims extend the range to 350^oF (177^oC)

  *Double-acting models use pressure to rotate in both directions. Spring return models use pressure for one direction of rotation and spring force for the reverse rotation.

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