The Bettis Standard Electro-Hydraulic Operator (EHO) is an integrated actuator designed for quarter-turn valves, ideal for Emergency Shut Down (ESD) applications. It combines a spring-return mechanism, hydraulic power unit, and electronic controls to offer a fail-safe, simple solution for halting process flow during emergencies, ensuring safety and environmental protection. Suitable for harsh conditions, it features over fifteen alerts, supports HART and FOUNDATION Fieldbus protocols, and offers IP68 and IP67M protection.