Series 98H Scotch Yoke Hydraulic Actuator Product Image

1 / 5

Bray Series 98H Scotch Yoke Hydraulic Actuator

Hydraulic actuation for ball valves and butterfly valves, with spring-return configurations available

Genuine product assurance
We can help verify product data and purchasing details.
Model confirmation
Confirm model, connection and key options before ordering.
After-sales support
After-sales communication support is provided according to the order agreement.

Bray Series 98H scotch yoke hydraulic actuators are designed for hydraulic automation of ball valves and butterfly valves. Operating pressure ranges from 500 to 3000 psi, with output torque from 187 to 100,000 Nm. They support on/off, throttling, direct-acting, and spring-return control. Applications include high-torque actuation in process pipelines, emergency shutdown, and hydraulic cushioning stations for fast-acting valves.

Specifications

Power Source: Hydraulic
Output Torque: 1,629 to 885,100 in-lb (187 to 100,000 Nm)
Spring End Torque: 2,744 to 445,261 in-lb (310 to 50,306 Nm)
Operating Pressure Range: 500 - 3000 psi (35 - 207 bar)
Operating Temperature Range: 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)
Compatible Media: Hydraulic fluid (standard internals); ISO VG 32/46, ISO-L-HV, flash point > 157°C
Control Options: On/off, throttling, direct drive, spring return
Protection Rating: IP66/IP67M, compliant with IEC 60529
Mounting Standard: ISO 5211: 2001(E), MSS SP-101-1989
Accessory Mounting Standard: NAMUR-VDE
Performance Test Standard: EN 15714-4:2009
Safety Certifications: ATEX, PED, SIL 3
Valve Compatibility: Ball valves, butterfly valves
Available Configurations: Symmetric scotch yoke, canted scotch yoke, extended stops, hydraulic override, jacking screws, jacking screw gear-driven override, hydraulic dampers, partial stroke/lockout

Application scenarios

Emergency Shutdown of Ball and Butterfly Valves

For emergency shutdown stations involving ball or butterfly valves in process pipelines. The Series 98H supports spring-return, partial-stroke, and lockout configurations, and is certified for SIL 3 applications. It can be used in valve automation loops that require emergency shutdown function verification.

High-Torque Hydraulic Automation for Ball and Butterfly Valves

For hydraulic automation of ball and butterfly valves, with direct mounting on Bray valves. The series operates at pressures from 500 to 3000 psi and provides an output torque range of 187 to 100000 Nm, supporting on/off, throttling, and direct-drive control.

Hydraulic Cushioning for Fast-Acting Valves

For automation stations involving ball or butterfly valves that require fast actuation. The Series 98H can be equipped with optional hydraulic shock absorbers for applications requiring cushioning at the end of the actuator stroke.

Selection points

Modular Design and Module Alignment

This series features a modular design with precision-machined centering rings to ensure module alignment, enabling configuration to meet application requirements.

Direct-Mount Interface and Standardized Installation

This series is designed for direct mounting in valve automation and can be installed directly on Bray valves. Mounting dimensions comply with ISO 5211:2001(E), and accessory mounting complies with NAMUR-VDE standards.

Hydraulic Pressure Range and Torque Coverage

This series is hydraulically actuated, with an operating pressure range of 500 to 3000 psi (35 to 207 bar), an output torque range of 187 to 100000 Nm, and a spring end torque range of 310 to 50306 Nm.

Scotch Yoke Valve Actuation Compatibility

This product is a scotch yoke hydraulic actuator. Product documentation confirms compatibility with ball valves and butterfly valves, making it suitable for quarter-turn valve automation selection.

Safety Certifications and Emergency Shutdown Applications

This series has relevant ATEX, PED, and SIL 3 certifications or applicable configurations. Product documentation lists emergency shutdown among its applications.

Control Modes and Functional Options

This series supports on/off, flow control, direct-acting, and spring-return control modes, with optional hydraulic override, hydraulic shock absorbers, and partial-stroke/locking functions.

Installation & maintenance notes

Hydraulic Pressure and Fluid Compatibility

Before installation, confirm that the site hydraulic system pressure and hydraulic fluid meet Series 98H requirements. Operating pressure must be within 500 to 3000 psi (35 to 207 bar), and the specified hydraulic fluid must be used.

Installation Temperature and Configuration Range Verification

Before installation and operation, confirm the operating temperature range according to the actuator configuration. The standard configuration is suitable for -29°C to 100°C, the low-temperature configuration can be used in environments as low as -46°C, and the PED configuration is suitable for -29°C to 80°C.

FAQ

How does the Series 98H hydraulic actuator enable modular, direct-mounted valve configurations?

The Series 98H is designed as a modular hydraulic actuator for direct mounting. Its compact construction and centering ring facilitate field assembly, improve matching efficiency, and support flexible valve automation applications.

What are the operating pressure and temperature ranges of this actuator?

The operating pressure range is 500–3000 psi (35–207 bar). The standard temperature range is -20°F to 212°F (-29°C to 100°C), low-temperature versions operate down to -50°F (-46°C), and PED versions operate from -20°F to 176°F (-29°C to 80°C).

What are the output torque range and control options for the 98H?

The output torque range is 1,629 to 885,100 in-lb (187 to 100,000 Nm). Control options include on/off, throttling, direct drive, and spring return.

What protection rating and certifications does this actuator have?

The protection rating is IP66/IP67M, compliant with IEC 60529. Certifications include ATEX, SIL 3, and PED (as required).

How should the actuator model be selected and valve compatibility determined?

Selection should be based on the selected valve type (ball valve or butterfly valve), required torque, supply pressure, operating temperature, and other conditions. The specific configuration must be confirmed according to the actual model and application conditions.

Documents