Bettis CBB 315-SR80 Pneumatic Actuator

Bettis CBB 315-SR80 Pneumatic Actuator

The Bettis CBB 315-SR80 is a spring-return pneumatic scotch-yoke actuator engineered to deliver reliable and high-torque performance for quarter-turn valves, such as ball, plug, and butterfly valves. As part of the Bettis CBB-Series, this model combines compact dimensions, rugged ductile-iron construction, and a mechanically efficient scotch-yoke mechanism optimized for high break-torque requirements.

The SR80 configuration indicates a spring-return module rated for 80—providing fail-safe capability (fail-open or fail-close depending on installation). This model is designed for critical isolation applications in oil & gas, petrochemical, power, and general industrial service where dependable fail-safe operation is essential.

Internal cylinder surfaces are coated for reduced friction and long-term durability, while the spring module ensures a consistent and powerful return stroke even under harsh operating conditions. The CBB 315-SR80 supports both vertical and horizontal mounting orientations and is compatible with manual override options.

Technical Specifications – CBB 315-SR80

Actuator Type

• Pneumatic scotch-yoke, quarter-turn actuator

• Model: CBB 315 – SR80

• Configuration: Spring-Return (SR80 cartridge)

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Performance

Torque Output

• The Spring-Return “SR80” cartridge provides a defined torque profile as listed in the catalogue’s spring-return torque tables.

• Torque is shown for spring stroke (fail stroke) and air stroke (powered stroke) according to the SR80 rating.

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Operating Pressure

• Designed for standard pneumatic supply ranges used across the CBB-Series (consult torque curves for exact torque at given pressures).

• Suitable for typical instrument-air systems used in valve automation.

Construction & Materials

• Body / Housing: Rugged CBB-Series construction with robust mechanical structure intended for severe service.

• Spring Module: SR80 spring pack designed for reliable fail-safe operation. The catalogue explicitly outlines the SR spring cartridges and torque characteristics.

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• Scotch-Yoke Mechanism: Provides high break torque for moving tight-seated valves.

Environmental Conditions

• Suitable for harsh industrial environments typical to Bettis CBB actuators.

• Designed for flexible installation (horizontal or vertical).

• Compatible with optional coatings and trims for corrosive or severe environments (as supported in the CBB-Series).

Mounting & Interface

• Dimensions and mounting interfaces for the 315 size actuator are provided in the catalogue’s dimensional tables and drawings under the 315 model section.

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• Actuator-to-valve mounting follows standardized Bettis CBB platform patterns.

Spring-Return Characteristics

• SR80 refers to the spring force rating, with detailed torque performance shown across the spring stroke and air stroke.

• Performance curves for SR80 are available in the catalogue section “Spring Return Torques”.

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This ensures:

• Reliable fail-close or fail-open action depending on assembly.

• Strong spring force for emergency shutdown or fail-safe positioning.

Applications

• Quarter-turn valves:

  • Ball valves

  • Butterfly valves

  • Plug valves

• ESD (Emergency Shutdown) service

• On/Off valve automation in O&G, petrochemical, and processing industries