Bray Series 98 Scotch Yoke Pneumatic Actuators are designed for on/off control of ball valves and butterfly valves, delivering output torque from 310–100,000 Nm. Operating temperature: -46°C to 149°C; pressure: 40–150 psi; enclosure rating: IP66/IP67M. Standard mounting and interfaces comply with ISO 5211 and MSS SP-101. Available in double-acting/direct-drive and spring-return configurations for reliable valve automation in humid and dusty environments.
Series 98 Scotch yoke pneumatic actuator product image
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Bray Series 98 Scotch Yoke Pneumatic Actuator
Pneumatic actuator for ball valve and butterfly valve control, with spring-return capability
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Specifications
- Output Torque Range
- 2,744 to 885,100 in-lb (310 to 100,000 Nm)
- Spring-End Torque
- 2,744 to 445,261 in-lb (310 to 50,306 Nm)
- Maximum Allowable Operating Pressure
- 40 - 150 psi (2.8 - 10.3 bar)
- Operating Temperature Range
- -50°F to 300°F (-46°C to 149°C)
- Ingress Protection Rating
- IP66/IP67M (IEC 60529)
- Mounting Standard
- ISO 5211:2001(E), MSS SP-101-1989
- Accessory Mounting Standard
- NAMUR-VDE
- Certifications
- ATEX, PED, SIL 3, ABS
- Control Modes
- On/off, direct drive, spring return
- Supply Medium
- Dry compressed air, inert gas
- Power Source
- Pneumatic
- Test Standard
- EN 15714-3:2009
- Valve Compatibility
- Ball valves, butterfly valves
Application scenarios
Emergency shutdown actuation for ball valves and butterfly valves
Series 98 can be used for emergency shutdown applications on ball valves and butterfly valves. It is available with spring-return control and offers SIL 3 suitability and ATEX certification options.
Pneumatic on/off control for high-torque ball valves and butterfly valves
Series 98 can be powered by dry compressed air or inert gas from 40 to 150 psi for pneumatic on/off operation of ball valves and butterfly valves, with an output torque range of 310 to 100,000 Nm.
Valve automation in high- or low-temperature service
Series 98 can be configured for high- or low-temperature conditions for pneumatic automatic operation of ball valves and butterfly valves, with an operating temperature range from -46°C to 149°C.
Valve actuation in wet and dusty industrial installations
Series 98 can be used in industrial valve automation installations that may be exposed to dust and water ingress, with an IP66/IP67M protection rating.
Selection points
High-Torque Scotch Yoke Actuator
Series 98 is a pneumatic scotch yoke actuator with an output torque range of 310 to 100,000 Nm, suitable for valve applications including ball valves and butterfly valves.
Modular Configurable Design
Series 98 features a modular, configurable design that can be configured on site according to application requirements, with direct-acting and spring-return control options available.
Symmetric and Canted Yoke Options
Series 98 offers symmetric and canted yoke options, allowing the appropriate yoke configuration to be selected based on valve operating conditions.
Wide Temperature Range and IP Protection
Series 98 covers a temperature range of -46°C to 149°C and is rated IP66/IP67M, making it suitable for pneumatic valve applications requiring consideration of both temperature and protection conditions.
Installation & maintenance notes
Verify Actuator-to-Valve Mounting Interface
When installing a Bray Series 98 actuator, confirm that the actuator and valve mounting interfaces comply with and are correctly matched to the ISO 5211:2001(E) mounting standard.
Use the Specified Air Supply and Control Supply Pressure
Bray Series 98 actuators should use dry compressed air or inert gas as the supply medium, with supply pressure maintained within the specified range of 40 to 150 psi (2.8 to 10.3 bar).
FAQ
How does the Series 98 pneumatic actuator operate?
Series 98 actuates valve opening and closing pneumatically. Its compact design combined with a high torque-to-weight ratio provides control options including on/off, direct drive, and spring return to suit different operating conditions.
What are the key selection considerations for this series?
Key considerations include the required output torque range, operating pressure, medium characteristics, and temperature conditions. The series offers multiple output torque ratings and temperature options, which should be matched to valve compatibility and site mounting standards, such as ISO 5211.
What are the applicable temperature and pressure ranges?
Operating pressure is 40–150 psi (2.8–10.3 bar). The temperature range is typically -20°F to 200°F (-29°C to 93°C), with high-temperature operation up to 300°F (149°C) and low-temperature operation down to -50°F (-46°C).
Which valve types and mounting standards does this actuator support?
It is compatible with ball valves, butterfly valves, and other valve types. Mounting conforms to ISO 5211:2001(E) and MSS SP-101-1989, while shaft-drive accessory mounting conforms to the NAMUR-VDE standard.
How should output torque and ingress protection rating be evaluated during selection?
The output torque range is 2,744 to 885,100 in-lb (310 to 100,000 Nm), and the ingress protection rating is IP66/IP67M in accordance with IEC 60529. Select the appropriate model based on the specific torque and protection requirements of the application.
Documents
Product Brochure - Actuators and ControlsProduct information · EnglishProduct Brochure - Valve Automation Center (VAC)Product information · EnglishProduct Brochure - Series 98 Pneumatic ActuatorsProduct information · EnglishProduct Brochure - Series 98 Scotch Yoke Pneumatic ActuatorProduct information · EnglishApplication Guide - Steam Turbine Shutdown and Anti-Surge ValvesProduct information · EnglishIOM Manual - Series 98 Pneumatic and 98H Hydraulic Scotch Yoke ActuatorsManual · EnglishIOM Manual - Series 98 Pneumatic and 98H HydraulicManual · ChineseIOM Manual - Series 98 Pneumatic and Series 98H Hydraulic Scotch Yoke ActuatorsManual · EnglishSafety Manual - Series 98 Pneumatic ActuatorsManual · EnglishTechnical Sales Manual - Series 98 Pneumatic Scotch Yoke ActuatorsManual · EnglishIOM Manual - Series 98 Pneumatic and Series 98H Hydraulic Scotch Yoke ActuatorsManual · EnglishSales Data Sheet - Type 98 Pneumatic Scotch Yoke ActuatorProduct information · EnglishSales Data Sheet - Series 98 Pneumatic Scotch Yoke ActuatorsProduct information · EnglishSales Data Sheet - Series 98 Scotch Yoke Pneumatic ActuatorProduct information · English