Bettis CBB-Series Scotch Yoke Pneumatic Valve Actuator

The Bettis CBB-Series Scotch Yoke Pneumatic Valve Actuator is a robust, high-performance actuator designed for reliable and efficient operation of quarter-turn valves—including ball, butterfly, and plug valves—in demanding industrial environments. Manufactured by Emerson, the CBB-Series provides powerful torque output, long service life, and precise control for both on/off and modulating valve applications. At the heart of the actuator is the Scotch yoke mechanism, which delivers high torque at the beginning and end of the stroke—exactly where valves need it most. This design enhances operational efficiency, reduces air consumption, and ensures smooth, controlled movement even under heavy-duty service conditions. Available in double-acting and spring-return (fail-safe) configurations, the CBB-Series can be tailored for specific process requirements and safety needs. Its modular design allows easy maintenance, field conversion, and integration with a wide range of control accessories such as positioners, solenoid valves, and limit switches. The corrosion-resistant construction, featuring hard-anodized aluminum or carbon steel cylinders with epoxy coatings, ensures durability and performance in harsh conditions like offshore platforms, refineries, and chemical plants. The actuator meets international standards for valve mounting (ISO 5211) and accessory interfaces (NAMUR), ensuring compatibility across systems.

Technical Specification of Bettis CBB-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, SHELL DEP, ABS

Control Type

On/off

Valve Type

Ball, Butterfly, Plug, Triple Offset Valves, Other Quarter-Turn Devices

Operating Temperature

Available in three different temperature trims: · Standard trim is suitable for -20°F to +200°F (-29°C to +93°C) · Optional high temperature trim +350°F (-18°C to +177°C) · Cold temperature trim -40°F to +150°F (-40°C to °C)

Torque/Thrust

Spring-return models in excess of 4,269 in-lbs (482 Nm), Double-acting in excess of 11,515 in-lbs (1,301 Nm)

Operating Pressure

Up to 150 psig (10 Bar)

Feature of Bettis CBB-Series Scotch Yoke Pneumatic Valve Actuator

• Economical jackscrew manual override available to ensure reliable valve control in the event of the power loss.
• CBB symmetrical mounting pads allows field reversal of spring return actuator failure mode with no disassembly required (CW or CCW)
• Compact and lightweight
• Backed by a five-year material and workmanship warranty