CBA Series Valve Actuators

CBA-Series Valve Actuators

Introduction

Bettis^®’ CBA-Series pneumatic actuators are compact, lightweight and ideally suited for automating ball, butterfly and non-lubricated plug valves, or any quarter- turn (90 degree) rotating mechanism. These efficient, low maintenance actuators, with optional controls, provide a reliable method of operating and confirming valve position for a fully automated process. The CBA-Series, available in double-acting and spring-return models, are independently certified to BS 5490: 1977 - IP66 and IP67M for water ingress protection.

Double-acting CBA-Series actuators, requiring pressure to rotate in either direction, are available with guaranteed minimum torque outputs to 12,245 lb-in (1,384 Nm).

The CBA-Series spring-return models require pressure in only one direction of travel and are suitable for fail clockwise or counterclockwise applications without modification. These models produce guaranteed spring ending torques to 4,971 lb-in (562 Nm).

Standard construction CBA-Series actuators are designed for operating temperatures of -20°F to +200°F (-30°C to +95°C). High temperature trim allows continuous operation from 0°F to +350°F (-18°C to +177°C). Additionally, low temperature trim allows operation from -40°F to +180°F (-40°C to +82°C). Consult factory when temperature requirements exceed these limits. Operating pressures for the CBA-Series range from 40 up to 150 Psig (3 to 10 Barg).

Typical Applications

Automation of ball, butterfly and plug valves
Automation of louvers and dampers
Automation of any quarter-turn mechanism

Key Features

Outer Lip-Type Torque Shaft Seals restrict external contaminants, providing a high level of corrosion and water resistance
O-Ring Sealed Cylinders essentially eliminate the possibility of any cylinder leakage throughout the full range of operating and climatic conditions
Standard Accessory Mounting Pad is identical on all CBA and CBA-300 Series models allowing the panel mounting of controls
Piston Heel and Yoke Pin Bearings manufactured from PTFE/bronze help ensure smooth and consistent torque output and increase total cycle life
Totally Enclosed Body provides complete protection of all internal moving parts and minimizes the chance of injury to operating personnel
The Scotch-Yoke Mechanism transforms linear movement of the piston into a 90 degree rotating movement, providing optimum start or end torque
Center Bar, made of high strength alloy steel, guides the piston throughout its full stroke, preventing metal to metal contact with the cylinder bore
Bi-directional Travel Stops are an integral part of the actuator allowing 80° to 100° total travel adjustment. Extended travel stops are optional
Critical Bearing Surfaces are permanently lubricated with a baked on dry film lubricant containing unique corrosion inhibitors
Xylan^TM Cylinder Coating, the standard internal coating on all CBA-Series actuators. This fluoropolymer coating is highly resistant to abrasion, thermal shock and provides excellent lubricity and low friction properties. Corrosive properties of salts and other chemicals normally found in the atmosphere or instrument air supply system will not adversely affect its performance. Xylan^TM bonds to the chemically prepared surface of the steel cylinder so effectively that, unlike other coatings, cracking and flaking are virtually eliminated
Dual Valve Mounting Interface allows the flexibility to change the spring fail mode, without disassembly of the actuator, by simply inverting the actuator. They may be installed in any position; parallel or at right angles to the flow line, in the vertical or the horizontal plane

Downloads

Product Brochures

CBA-Series Pneumatic Actuators - Document Number 20.00-4 Rev:9/02

Additional Technical Data
CBA Series Technical Data

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