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
XylanTM 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. XylanTM 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
WellGuard? PWG Valve Actuators
The WellGuard? piston range of pneumatic Control Fluid Powered linear actuators is designed to be used in conjunction with Bettis valve bonnets to provide open and close control for major brands of API 6A through conduit reverse acting gate valves fitted to oil and gas wellheads and production flow lines. These actuators can be used with API 6D and ANSI B16.34 valves where the bonnets are built to Bettis design.
Key Features
Lightweight
Actuator Upper Shaft acts as visual position indicator
Easy maintenance and disassembly, no special tools required
Construction uses no large mounting threads, eliminates galling and corrosion
Designed for interchangeability with Bettis pneumatic diaphragm and hydraulic piston WellGuard linear actuators
Actuator temperature operating range: –50°F to +150°F (–58°C to 65°C)
Bonnet temperature class "L to U" and tested for 300°F Service
Suitable for use with eutectic (fusible) lock open device
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