The Bray 92/93-XT Series is a high-temperature pneumatic rack-and-pinion opposed-piston actuator for butterfly and ball valves, available in double-acting or spring-return configurations, with output torque up to 4,986 Nm. Its operating temperature reaches 176°C and it supports 4 hours of operation at 250°C, making it suitable for automated on/off isolation and throttling control in high-temperature process pipelines.
92/93-XT Series high-temperature pneumatic actuator product image
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Bray 92/93-XT Series High-Temperature Pneumatic Actuators
High-temperature pneumatic actuators for butterfly valves and ball valves, with spring-return options
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Specifications
- Output Torque
- Up to 44,130 in-lb (4,986 Nm)
- Actuation Method
- Pneumatic
- Actuator Type
- Rack-and-pinion opposed piston
- Action
- Double-acting, spring return
- Rotation Angle
- Double-acting: 90°, 135°, and 180°; spring return: 90°
- Travel Stop Adjustment Range
- +5° to -5°
- Operating Temperature Range
- 0°F to 350°F (-18°C to 176°C); 4 hours at 482°F (250°C)
- Maximum Allowable Operating Pressure
- Up to 140 psig (10 bar)
- Supply Medium
- Dry compressed air, inert gas
- Protection Rating
- IP66/IP67M, compliant with IEC 60529
- Mounting Standard
- ISO 5211: 2001(E)
- Design Standard
- EN 15714-3
- Valve Body Material
- Anodized aluminum
- Valve Cover Coating
- Polyester coating
- Valve Compatibility
- Butterfly valves, ball valves
- Certifications
- ABS, ATEX, Bureau Veritas, PED, SIL 3
Application scenarios
Automated On/Off Isolation of Butterfly or Ball Valves in High-Temperature Process Lines
Provides pneumatic automated opening and closing of butterfly or ball valves under high-temperature process conditions. Designed for high-temperature environments, this series supports double-acting or spring-return configurations for on/off control, with adjustable travel stops for setting valve open and closed positions.
Throttling Control of Butterfly or Ball Valves
Provides pneumatic throttling control for butterfly or ball valves. This series is specifically suited to throttling applications, featuring a rack-and-pinion opposed-piston design and bidirectional adjustable travel stops for adjusting the valve open and closed end positions.
Selection points
High-Temperature Service Compatibility
This series is designed for high-temperature applications, with an operating temperature range of 0°F to 350°F (-18°C to 176°C), and can withstand 4 hours of heat exposure at 482°F (250°C).
Opposed-Piston Rack-and-Pinion Multi-Angle Output
This series features a rack-and-pinion opposed-piston design and is available in double-acting and spring-return configurations. Double-acting models provide 90°, 135°, and 180° rotation, while spring-return models provide 90° rotation, making them suitable for quarter-turn valves such as butterfly valves and ball valves.
ISO 5211 Direct Mounting and NAMUR Accessory Compatibility
The actuator complies with the ISO 5211:2001(E) mounting standard, allowing direct mounting to Bray valves. It is also compatible with NAMUR accessories, reducing the need for external mounting hardware.
Bidirectional Travel Stop Adjustment
The actuator is equipped with two independently adjustable travel stop screws and an output shaft cam, enabling bidirectional adjustment of valve open and closed positions. The travel adjustment range is +5° to -5°.
IP66/IP67M Protection Rating
The actuator is rated IP66/IP67M in accordance with IEC 60529 and is suitable for industrial environments requiring environmental protection.
Installation & maintenance notes
High-Temperature Service Temperature Verification
Before installation, verify that site temperatures comply with the permissible operating temperature and duration requirements of this high-temperature actuator to avoid exceeding its verified application range.
Pneumatic Supply Medium Verification
The pneumatic actuator shall use dry compressed air or inert gas as the supply medium.
Valve and Actuator Mounting Compatibility
Install the actuator correctly with the matching valve in accordance with the ISO 5211 mounting standard, ensuring proper engagement between the actuator output connection and the valve connection interface.
FAQ
How do 92/93-XT Series pneumatic actuators operate?
The 92/93-XT Series uses rack-and-pinion opposed pistons for on/off operation. Double-acting versions rotate through 90°, 135°, or 180°, while spring-return versions are adjustable to 90°, providing precise positioning and reliable switching in high-temperature environments.
What technical advantages does this series offer in high-temperature environments?
The design combines a modular construction with high-temperature-resistant materials to maintain high-precision control under elevated temperatures. Its fully enclosed, self-contained construction reduces maintenance requirements and improves installation safety in the field.
How should control options and supply media be considered during selection?
Available control modes include on/off, throttling, double-acting, and spring return. The supply medium is dry compressed air or inert gas, with a maximum operating pressure of up to 140 psig (10 bar). Final selection should consider the valve type and site media requirements.
What are the key considerations for mounting and interfacing with valves?
Compliant with ISO 5211 dimensional standards, the actuator can be mounted directly to the valve without external linkages. This simplifies field installation and helps reduce misalignment and contaminant accumulation.
How are reliability and maintainability ensured in high-temperature applications?
The product features a fully enclosed, self-contained construction with adjustable travel-stop screws and output-shaft cams for precise positioning. Accessories are modular for convenient replacement and maintenance. The applicable temperature range and special coatings should be confirmed for the specific model.
Documents
Product Brochure - 92/93 Series Pneumatic Actuators and AccessoriesProduct information · EnglishProduct Brochure - Actuators and ControlsProduct information · EnglishProduct Brochure - Valve Automation Center (VAC)Product information · EnglishIOM Manual - 92/93 Series Pneumatic ActuatorsManual · EnglishSales Data Sheet - 92/93 Series Extreme-Temperature Balanced Pneumatic ActuatorsProduct information · English