Bettis CBB315 Pneumatic Valve Actuator

Bettis CBB315 Pneumatic Valve Actuator

The Bettis CBB315 is a compact and robust pneumatic scotch-yoke actuator engineered for reliable quarter-turn valve automation. Designed to deliver high torque output with exceptional efficiency, the CBB315 is suitable for ball valves, butterfly valves, plug valves, and other 90-degree rotary applications. Its construction uses durable ductile iron components combined with a low-friction, fluoropolymer-coated internal cylinder to ensure long service life, low wear, and consistent performance in demanding industrial environments.

The actuator is available in double-acting and spring-return (fail-safe) configurations, making it adaptable to various process control requirements. Symmetrical mounting pads allow easy reversal of fail-open or fail-close direction on spring-return models without internal modification. Optional manual override systems (jackscrew or handwheel) enable secure operation during loss of air supply. Built for harsh operating conditions, the CBB315 supports a wide range of certifications and meets international standards for safety, reliability, and corrosion resistance.

Technical Specifications – Bettis CBB315

General

• Actuator Type: Pneumatic scotch-yoke quarter-turn actuator

• Model: CBB315

• Operation Modes:

  • Double-Acting (DA)

  • Spring-Return (SR) / Fail-Safe (Fail-Open or Fail-Close)

Performance

• Maximum Operating Pressure: Approx. 150 psig (≈10 bar)

• Torque Output:

  • Varies according to supply pressure and configuration

  • Provides high break-torque for reliable valve seating

• Torque Curve: Standard scotch-yoke torque profile (high break torque, reduced run torque)

Temperature Ratings

• Standard Temperature: –20°F to +200°F (–29°C to +93°C)

• Low-Temperature Option: Down to –40°F (–40°C)

• High-Temperature Option: Up to +350°F (+177°C)

Materials

• Actuator Housing: Ductile iron for high strength and impact resistance

• Cylinder Interior: Fluoropolymer (Xylan) coated for reduced friction and improved efficiency

• Piston & Yoke: High-grade steel/ductile iron depending on configuration

• Fasteners & Springs: Corrosion-resistant materials (depending on selected trim)

Construction Features

• Scotch-yoke mechanism for high break-torque characteristics

• Symmetrical spring cartridge mounting pads (spring-return)

• Optional manual override:

  • M3 jackscrew

  • M3HW jackscrew with handwheel

• Suitable for both vertical and horizontal installation

• Simple maintenance with field-serviceable components

Connections & Interface

• Pressure Ports: 1/4" NPT (typical for this model size)

• Mounting Interface: Standardized square drive / bolt-pattern per Bettis CBB design

• Output Shaft: Quarter-turn drive for ISO/DIN valve mounting (varies by configuration)

Dimensions (Typical for CBB315 SR with M3HW Override)

• Overall Length (A): ~26.7 in

• Height (B): ~14.4 in

• Cylinder Diameter: ~6 in

• Handwheel Dimension (F): ~10 in

(Note: Exact values depend on configuration—SR, DA, with/without override.)

Weight

• Approx. 16–20 lb, depending on version and optional accessories

Certifications & Compliance

• Available with certifications such as:

  • ATEX

  • CE, PED

  • SIL capability

  • NACE material compatibility

  • IP66 / IP67M enclosure rating

  • Marine/offshore options (ABS, etc.)

• Designed for oil & gas, petrochemical, chemical, power, and general industrial service

Applications

• Ball valves

• Butterfly valves

• Plug valves

• Emergency shutdown valves (ESD)

• On/Off or modulating control (with accessories)