Bettis CBA300 Series Scotch Yoke Pneumatic Valve Actuator

The Bettis CBA300 Series Scotch Yoke Pneumatic Valve Actuator is a rugged, high-performance rotary actuator engineered to deliver exceptional torque output and reliability for quarter-turn valve automation. Designed by Emerson, the CBA300 Series represents a robust evolution of Bettis’ proven Scotch yoke technology—offering reliable performance in the most demanding industrial applications including oil and gas, power generation, refining, and chemical processing. This actuator uses a Scotch yoke mechanism to efficiently convert pneumatic energy into rotary motion, providing maximum torque at the start and end of the stroke, where valves typically require the most force. Available in double-acting and spring-return (fail-safe) configurations, the CBA300 ensures dependable operation even in emergency shutdown (ESD) systems or remote field environments where safety and precision are critical. The CBA300 Series features a modular carbon steel design with a corrosion-resistant epoxy-coated finish, making it ideal for both onshore and offshore applications. Its pressure-balanced construction reduces side loading and wear, extending service life and ensuring consistent torque performance over millions of cycles. The actuator is compatible with ISO 5211 mounting interfaces, NAMUR accessory connections, and integrates seamlessly with Bettis control systems, Fisher digital positioners, and other Emerson valve automation components.

Technical Specification of Bettis CBA300 Series Scotch Yoke Pneumatic Valve Actuator

Power Source

Pneumatic

Product Type

Pneumatic Actuator

Actuation

Fail-Safe, Quarter-turn, Spring-Return, Double-Acting

Certifications

ATEX, PED, (CE), SIL capable, NACE, TRCU/EAC/GOST, ABS

Control Type

On/off

Valve Type

Ball, Butterfly, Non-Lubricated Plug Valves, and Other Quarter-Turn Devices

Operating Temperature

Standard range: -20°F to +200°F (-29°C to +93°C). Optional range: to -40°F (-40°C) or to +350°F (+177°C)

Torque/Thrust

Spring-return models in excess of 10,457 lbs-in (1,182 Nm), Double-acting in excess of 20,030 lbs-in (2,273 Nm)

Operating Pressure

40 to 150 psig (3 to 10 bar)

Feature of Bettis CBA300 Series Scotch Yoke Pneumatic Valve Actuator

• Can be integrated into systems with existing common communication protocols and DCMLink
• Economical jackscrew manual override available to ensure reliable valve control in the event of the power loss.
• ISO/DIN bottom mounting for close or direct coupling to the valve topworks
• NAMUR standardization allows direct or close coupling of accessory hardware
• Backed by a five-year material and workmanship warranty