Overview
The Bettis RPC 450 DA is a rack-and-pinion pneumatic valve actuator engineered for quarter-turn valve automation. Operating at a maximum pressure of 120 PSI, this RPC 450 DA pneumatic valve actuator delivers consistent bidirectional control for ball, butterfly, plug valves, and other quarter-turn applications. The double-acting design ensures equal torque output in both opening and closing directions, making it ideal for demanding process control environments.
Key Features
- Double-acting design with bidirectional control capability
- Rated for 120 PSI maximum operating pressure
- Rack-and-pinion mechanism for reliable torque transmission
- Compact, lightweight construction suitable for tight piping configurations
- Heavy-duty body casting with corrosion-resistant coating
- Stainless steel fasteners for enhanced durability in process environments
Technical Specifications
- Model: RPC 450 DA (Clockwise)
- Part Number: 118235
- Manufacturer: Bettis (Emerson)
- Operating Pressure: 120 PSI maximum
- Actuation Type: Double-Acting Pneumatic
- Mechanism: Rack-and-Pinion
- Rotation: Clockwise
- Application: Quarter-turn valves (ball, butterfly, plug)
- Operating Temperature: -20°C to +80°C (-4°F to +176°F) standard
- Body Material: Cast iron with polyurethane powder coating
- Pinion Material: High-strength aluminum alloy
Typical Applications
The RPC 450 DA is widely used in:
- Process control valve automation in manufacturing and chemical plants
- HVAC and building automation systems
- Oil and gas process instrumentation
- Water treatment and utility applications
- Industrial damper and louver control
- Emergency isolation and shutdown systems
Compatibility & Replacements
Compatible With
- Bettis RPC-Series pneumatic control systems
- Standard ISO quarter-turn valve flanges
- Industrial pneumatic supply networks (40-120 PSI)
- Process automation and valve control panels
- Pneumatic solenoid valve control circuits
Replaces / Drop-In Replacement For
Verify compatibility with your system integrator before ordering. The RPC 450 DA is the standard double-acting configuration for the Bettis RPC 450 size class. Related Bettis models in the RPC series include spring-return variants; however, direct cross-compatibility must be confirmed against your specific valve and control circuit requirements.
Works With
- Pneumatic solenoid directional control valves
- Pneumatic pressure regulators and pilot controls
- Manual and automated valve control systems
- Process instrumentation and SCADA integration
- Standard 4–20 mA and discrete I/O control interfaces (via solenoid interface)
