Electric Actuated Valves
Electric actuated valves use a motor-driven actuator to open, close or modulate the valve, making them the natural choice where compressed air is unavailable, where precise positioning is needed, or where long travel and high thrust suit a geared electric drive. An electric actuator combines a motor, gearing, position-sensing and control electronics so the valve can follow an on/off or 4-20 mA modulating signal from a PLC/DCS and report its position back.
For quarter-turn valves (ball, butterfly, plug) part-turn electric actuators are used; for multi-turn valves (gate, globe) multi-turn actuators drive the stem through many rotations. Performance and duty follow EN 15714-2 classes — on/off (Class A), inching (B) and modulating (C) — with output speed, torque/thrust and duty cycle matched to the valve and process. Enclosures are typically IP67, with IP68 for occasional submersion, and double-sealed designs to protect electronics from the environment.
Fail-safe behaviour, which is intrinsic to a spring-return pneumatic actuator, is achieved electrically through battery- or capacitor-backup units that drive the valve to a pre-configured position on mains failure, or through mechanical spring-return electric actuators. ATEX / IECEx versions are available for hazardous areas, and integral controls offer local display, fieldbus (Modbus, Profibus, HART, Foundation Fieldbus) and diagnostics.
Materials follow the host valve — carbon (WCB), stainless (CF8M), duplex or exotic — with actuator housings in coated aluminium or steel rated for the site. Himalay's MSME partners supply factory-mounted electric assemblies (with Rotork/Auma-equivalent or comparable actuators), each tested for stroking, torque/thrust, limit and torque-switch setting and signal response, with valve testing per API 598 / BS EN 12266-1 / ISO 5208, material traceability, and PED-CE (EU), SABER (Saudi Arabia) and NACE MR0175 (sour service) coordinated as part of the standard order flow.
