Electro-hydraulic valve actuator Bettis EHO

quarter-turndouble-actingIP68

Product overview
The Bettis Smart Electro‑Hydraulic Operator (EHO) is a self-contained electro-hydraulic actuator engineered to operate quarter-turn valves and provide fail-safe Emergency Shut Down (ESD) capability. Integrated hydraulic power pack, spring-return fail-safe mechanism and electronic control enable reliable operation in remote and hazardous environments with low power consumption.

Key features

• Local HMI: full-color TFT display showing valve position, alarms, configuration menus, temperature and live diagnostics.
• Advanced diagnostics and remote monitoring via DCMlink with torque curves, PST curve, operating data and full data-logger records.
• Over 25 built-in alerts and alarms with on-screen troubleshooting guidance.
• Communications: Modbus, HART (HART7) and FOUNDATION Fieldbus for integration with plant control and asset-management systems.
• Fail-safe options: spring-return actuator and optional accumulator for stored hydraulic energy to allow multiple operations during power loss and to support modulating control.
• Designed for low power consumption; optional solar-power capability for remote sites.
• Environmental ratings: control enclosure IP68; hydraulic actuator IP67M; motor IP68.

Applications

• Emergency shutdown (ESD) of process lines in oil & gas, petrochemical and industrial plants.
• On/off, isolation and modulating control of quarter-turn valves in hazardous areas.
• Remote site installations requiring low-power and solar-ready actuation solutions.

Certifications & safety

• Certified ATEX Ex d IIB T4 and IECEx Ex d IIB T4; also FM, CSA, PESO, CCOE as applicable.
• SIL performance: SIL 3 for Smart EHO spring-return; SIL 2 for standard EHO per IEC 61508 / IEC 61511.
• Designed to meet hazardous-area and safety-instrumented system requirements for ESD applications.

Technical specifications

• Power source: electro-hydraulic with integral hydraulic power pack.
• Product type: electro-hydraulic actuator for quarter-turn valves.
• Actuation: spring-return (fail-safe) and double-acting options.
• Control modes: On/Off, isolation, modulating and ESD.
• Communications protocols: Modbus, HART (HART7), FOUNDATION Fieldbus.
• Protection: Control enclosure IP68; Hydraulic actuator IP67M; Motor IP68.

Options

• Accumulator for stored hydraulic energy.
• Solar-power kits for remote operation.
• Custom configuration and DCMlink integration for central monitoring.