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Bray Electro-Hydraulic Actuator Series 98EH

Bray offers advanced modular self-contained electro-hydraulic actuators, fully configurable to suit various valve services and applications.

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Product Overview

Zero-emission self-contained electro-hydraulic actuator

Zero-emission electro-hydraulic actuator for industrial applications

Bray offers advanced modular self-contained electro-hydraulic actuators, fully configurable to suit various valve services and applications. The actuator is optimized for direct mounting on Bray valves but can be easily retrofitted to the valve of your choice. The electro-hydraulic actuator features an efficient self-contained hydraulic power unit that can be mounted directly on the valve actuator body or as a separate floor-mounted skid to power single or multiple valve control cylinders. The hydraulic power unit offers flexible power options, including solar-powered battery packs for remote locations with limited power availability. Using hydraulic fluid for valve control offers several significant advantages over traditional pneumatic or electric gear actuators. These advantages include: high thrust and high torque, fast actuation, fail-safe capability using springs or accumulator-style storage devices, and the ability to accurately and repeatedly position valves precisely. Electro-hydraulic actuators use closed-loop hydraulics with zero emissions, while pneumatic and natural gas-powered actuators produce exhaust emissions. Operating conditions range from -50°F (-46°C) to 212°F (+100°C), ensuring operation in the coldest outdoor environments and the hottest process applications.
Features
Zero-emission capability
Fully self-contained
Double-acting or spring-return
Electric on/off fail-safe
Continuous modulating capability
Multiple voltage and control signal options including network protocols
Can operate on solar or wind-powered charging packs for remote locations
Fast stroking speeds
Accurate control and repeatable precision
Fail-lock, fail-in-position, fail-open or fail-close using springs or accumulator-style storage devices
Remote and local diagnostic capability
Remote hydraulic power unit mounting option available
Remote and local control
Overstroke protection
Partial stroke testing
Weatherproof or explosion-proof construction
Actuator system alarm options
Manual override for operation during power loss
ESD and PST support
UL, FM, ATEX, CSA certified
SIL capable

Technical Specifications

ItemParameter
Output Torque1,177 to 863,089 in-lb (132 to 97,515 Nm)
Control Options12, 24 or 48 VDC, 120 or 220 VAC, 4-20 mA, 0-10 VDC
Network protocols
Temperature Range-50°F to 212°F (-46°C to 100°C)
Power Source12, 24 or 48 VDC, 120 or 220 VAC, 480V 3-phase, 50-60 Hz, solar or wind-powered charging packs
Maximum Allowable Working Pressure150 - 3000 psi
(10 - 207 bar)
Enclosure ProtectionWeatherproof and explosion-proof
MountingISO 5211:2001(E), MSS SP-101-1989
Testing StandardEN 15714-4:2009
Duty CycleOn/Off, Modulating
CertificationsUL, FM, CSA, ATEX
Valve CompatibilityRotary, linear, multi-turn and damper valves
ApplicationHigh-power on/off electrical fail-safe
Continuous modulating control valve services
ESD and SIS applications requiring SIL ratings
Custom solutions per customer specifications

FAQ

How does the Bray 98EH electro-hydraulic actuator achieve zero-emission operation?

The 98EH series uses a self-contained closed-loop hydraulic system to drive the valve, without relying on pneumatic or natural gas power, resulting in zero exhaust emissions during operation. The hydraulic power unit can be mounted directly on the actuator body or as a separate floor-mounted skid to power single or multiple valve control cylinders.

What valve types and control applications is the 98EH series suitable for?

This series can be used for rotary, linear, multi-turn, and damper valves, supporting on/off and modulating duty cycles. Control options include 12, 24, or 48 VDC, 120 or 220 VAC, 4-20 mA, 0-10 VDC, and network protocols. Specific configuration depends on the actual valve, control signal, and application conditions.

How do I select the appropriate output torque and hydraulic pressure for the 98EH series?

Selection should be based on valve opening/closing torque or thrust, operating speed, fail-safe requirements, control mode, and site conditions. The 98EH series output torque ranges from 132 to 97,515 Nm, with maximum allowable working pressure of 10 to 207 bar. For linear or multi-turn valves, stem thrust and drive mechanism should also be considered.

What fail-safe and emergency shutdown functions does the 98EH series offer?

The series can use double-acting or spring-return configurations, with fail-lock, fail-in-position, fail-open, or fail-close via springs or accumulator-style storage devices. It supports electric on/off fail-safe, ESD, PST, and SIL-related applications, suitable for high-power automatic fail-safe valve control.

Is the 98EH series suitable for outdoor, extreme temperature, and remote locations without stable power?

The operating temperature range is -46°C to 100°C, with weatherproof and explosion-proof construction options, plus local and remote control, diagnostics, system alarms, and manual override during power loss. For remote locations, solar or wind-powered charging packs can be used. Mounting complies with ISO 5211:2001(E) and MSS SP-101-1989.

Documents

Sales Data Sheet - 98EH Series Electro-Hydraulic ActuatorProduct information · EnglishSales Data Sheet - 98EH Series Electro-Hydraulic ActuatorProduct information · English

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