Series 98H Scotch Yoke Hydraulic Actuator Product Image
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Series 98H Scotch Yoke Hydraulic Actuator

The Bray Series 98 hydraulic actuator, designed with exceptional engineering and precision manufacturing, is part of our modular and fully configurable product line, optimized for direct mounting on Bray valves to improve flexibility, efficiency, and reduce costs.

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Product Overview

Modular hydraulic actuator designed for direct mounting

Direct-Mount Hydraulic Actuator for Flexible Valve Automation

Designed with exceptional engineering and precision manufacturing, the Bray Series 98 hydraulic actuator is part of our modular and fully configurable product line, optimized for direct mounting on Bray valves to improve flexibility, efficiency, and reduce costs. The Series 98 actuator is primarily used for hydraulic operation at a maximum pressure of 3000 psi (207 Bar) and a temperature range of -50°F (-46°C) to 212°F (+100°C).
Features
Compact design with high torque-to-weight ratio
Modular design for easy field configuration
Precision-machined centering rings ensure module alignment
Output torque range of 1,629 to 885,100 in-lb (187 to 100,000 Nm)
Spring end torque range of 2,744 to 445,261 in-lb (310 to 50,306 Nm)
Standard high-grade epoxy/polyurethane coating
Operating Conditions
Pressure range: 500 - 3000 psi (35 - 207 bar)
Medium: Hydraulic fluid
Temperature range options: Standard: -20°F to 212°F (-29°C to 100°C)
Low temperature: Down to -50°F (-46°C)
PED: -20°F to 176°F (-29°C to 80°C)
Torque reference: Mounting dimensions per ISO 5211: 2001(E)
Accessories: Shaft drive accessory mounting per NAMUR-VDE
Performance testing: EN 15714-4:2009
Ingress protection: IP67M and IP68 per IEC 60529
Safety: ATEX, SIL 3 capable, PED (upon request)

Technical Specifications

ItemParameters
Output Torque1,629 to 885,100 in-lb
(187 to 100,000 Nm)
Control OptionsOn/Off, Throttling, Direct Drive, Spring Return
Temperature Range-50°F to 212°F
(-46°C to 100°C)
Power SourceHydraulic
Maximum Allowable Operating Pressure500 - 3000 psi
(35 - 207 bar)
Protection ClassIP66/IP67M per IEC 60529
MountingISO 5211: 2001(E), MSS SP-101-1989
Supply MediumHydraulic fluid (standard trim) - ISO VG 32/46, ISO-L-HV, Flash point > 157°C
CertificationsATEX, PED, SIL 3
Test StandardEN 15714-4:2009
OptionsSymmetric Yoke, Canted Yoke, Extended Travel Stop, Hydraulic Override, Jacking Bolts, Jacking Bolt Gear Drive Override, Hydraulic Damper, Partial Stroke/Lock
Valve CompatibilityBall Valves, Butterfly Valves
ApplicationEmergency Shutdown

FAQ

What types of valves is the Bray 98H hydraulic actuator suitable for?

The 98H series is suitable for hydraulic automation of ball and butterfly valves, supporting on/off control, throttling control, direct drive, and spring return configurations, as well as emergency shutdown applications. Valve interface and output torque should be confirmed against the actual valve model, operating torque, and service conditions.

How do I select the appropriate 98H actuator torque and hydraulic pressure for a valve?

Selection begins by determining the valve's opening/closing torque under actual differential pressure, media, temperature, and cycling frequency, then matching the actuator output torque, spring end torque, and hydraulic supply pressure. The 98H series working pressure range is 35 to 207 bar, with output torque from 187 to 100,000 Nm.

How do I choose between symmetric yoke and canted yoke configurations?

Symmetric and canted yokes match different valve torque profiles and operating characteristics. The valve torque curve during opening, closing, and end positions should be evaluated, along with requirements for spring return, hydraulic override, partial stroke, or locking functions.

Can the 98H series be mounted directly to valves, and what interface standards apply?

The 98H series features a modular direct-mount design for Bray valves. Mounting dimensions comply with ISO 5211:2001(E) and MSS SP-101-1989; shaft drive accessories mount per NAMUR-VDE. Valve mounting flange, stem connection, rotation angle, and stop positions should be verified before installation.

What capabilities does the 98H series offer for low-temperature, outdoor, or safety-critical applications?

The standard temperature range is -29°C to 100°C, with low-temperature configurations down to -46°C. The PED temperature range is -29°C to 80°C. The actuator features a high-grade epoxy/polyurethane coating with ingress protection per IEC 60529. Available for ATEX, SIL 3, and PED requirements depending on configuration.

Documents

Product Brochure - Actuators & ControlsProduct information · EnglishProduct Brochure - Valve Automation Center (VAC)Product information · EnglishIOM Manual - Series 98 Pneumatic and 98H Hydraulic Scotch Yoke ActuatorManual · EnglishIOM Manual - Pneumatique Série 98 Et Hydraulique Série 98H Actionneur Scotch YokeManual · EnglishSafety Manual - Series 98H Hydraulic Scotch Yoke ActuatorManual · EnglishTechnical Sales Manual - Series 98H Hydraulic Scotch Yoke ActuatorManual · EnglishIOM Manual - Pneumatique Série 98 Et Hydraulique Série 98H Actionneur Scotch YokeManual · EnglishSales Data Sheet - Scotch Yoke Hydraulic Actuator Series 98HProduct information · ChineseSales Data Sheet - Series 98EH Electro-Hydraulic ActuatorProduct information · EnglishSales Data Sheet - Series 98EH Electro-Hydraulic ActuatorProduct information · EnglishSales Data Sheet - Series 98H Hydraulic Scotch Yoke ActuatorProduct information · EnglishSales Data Sheet - Series 98H Actuador Yugo Escocés HidráulicoProduct information · EnglishSales Data Sheet - Series 98H Atuador Hidráulico Scotch YokeProduct information · English

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