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Styling, strength, compactness, and simplicity of design have been combined to produce the Bray Series 92 direct acting and the Series 93 spring return pneumatic actuators.
Engineering excellence and precision manufacturing has produced a modular product line with reduced overall size requirements and economic savings. In addition all Bray accessories are fully modular and directly mount to the actuator – providing flexibility and efficiency at reduced cost.
Bray Series 92/93 actuators are rack and pinion, opposed-piston actuators available in two versions: double acting for rotation of 90°, 135° and 180°, and spring return for 90° rotation.
The Series 92/93 actuators were designed primarily for pneumatic operation up to a maximum pressure of 140 psig (10 Bar) and for temperature ranges of -4°F to 200°F (-20°C to 93°C). For higher and lower temperature applications, consult Jamieson Equipment Company.
All double acting and spring return units are suitable for both on/off and throttling applications. Actuators which can be actuated with other media such as hydraulic oil or water are also available as an option.
The Series 92/93 is completely enclosed and self contained. The many features minimize maintenance and provide safe, simple disassembly and assembly.
Specifications:• Torque: to 44,130 Lb-in (4,986 Nm)• Pressure Rating: Max Pressure: 140psig (10 Bar)• Temperature Range: Standard: -4°F to 200°F (-20°C - 93°C)• Low: -40°F to 176°F (-40°C - 80°C)• High: 0°F to 300°F (-18°C - 149°C)• Body Materials: Extruded Aluminum Alloy, Anodized 316 Stainless Steel, Electroless Nickel Plated Body Exterior, Hard Anodized Body Exterior• Output Shaft/Pinion: Carbon Steel, Zinc Plated, Stainless Steel
General: • The actuator shall be pneumatically operated and must travel a minimum of 95º in each direction to allow for over travel adjustment.• The actuator shall be rack and pinion design and the output torque shall be linear throughout travel.• The actuator shall be totally enclosed in a single enclosure with no external moving parts.• The actuator shall be factory lubricated with no field lubrication required.• The actuator shall be able to mount in any position without loss of performance.• All actuators (double acting or spring return) shall be suitable for both on-off and throttling applications.
Housing and End Caps: • Housing design must have smooth lines to provide for self-drain capability.• Housing shall be extruded, anodized aluminum alloy and all external fasteners shall be zinc plated carbon steel.• All pneumatic passageways must be integral to the actuator housing to eliminate the need for external tubing.• End caps shall be die cast aluminum alloy with corrosion resistant polyester coating.• All seals shall be Buna-N and bearings shall be manufactured out of lubricated acetal resin.
Pistons: • Shall be die cast aluminum alloy.• Shall be provided with acetal piston guides and rings to extend the life of the actuator and reduce friction.
Output Shaft and Pinion: • Must be manufactured out of hardened alloy steel and zinc plated for corrosion protection.• Shall be a one piece design.• The output shaft shall be provided with a mechanical, high visibility position indicator.
Travel Stops: • The actuator must be supplied with two independent travel stop adjustments (one on each end of travel)• Each end of travel (0º and 90º) shall have a minimum of +5º to -5º adjustment.
Spring Return System: • Must be installed in the same housing as the double acting actuator with no additional housing extensions.• Must be furnished as a self-contained spring cartridge system to assure safe disassembly of the actuator.• Springs shall be coated spring steel for corrosion protection.
Service Requirements: • Actuators shall be designed for pneumatic operation for the following service conditions:• Pressure up to a maximum of 140 psig• Available temperature ranges of -40°F (-40°C) to 300°F (149°C)• Filtered air is recommended but not required.• Optional units shall be available to operate with hydraulic oil or water if specified.
Testing: • All actuators shall be factory tested to ensure proper operation.
Mounting: • All actuators shall mount directly to the valve mounting flange and stem without the need for any brackets or couplings
Approvals & Certifications:• SIL Certification• ABS Certification• Bureau Veritas Certification
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