EHS-D3 Series

Plug & Play – ready-to-use actuator solution for quarter-turn valves.

The electro-hydraulic actuators of the EHS-D3 series combine the advantages of electric and hydraulic actuator technology and are ready for immediate commissioning. A combination of EHS Power Pack, paired with a hydraulic STK actuator provides a powerful unit that is electrically controlled and generates torques up to 50,000 Nm. It contains a closed hydraulic system, which does not require any external hydraulic lines and can be used flexibly due to its maintenance-free design. A wide range of sensors and modules are available for integration into Industrial 4.0 and IoT systems.

Whether ball valve or butterfly valve, dry or wet installed, the EHS-D3 is available in a wide range of designs.

Special Features

  • Electro-hydraulic drive consisting of EHS Power Pack and double-acting drive
  • Ready for immediate use
  • Constant torque over the entire swivel angle
  • Torque up to 50,000 Nm
  • Angle of rotation 90°
  • Flange connection to DIN ISO 5211
  • Electrically powered
  • Without external hydraulic lines
  • Optical position indicator
  • Adjustable end position
  • Low oil quantity
  • Maintenance-free
  • –25°C … +70°C


  • Functional safety for SIL 2 to IEC 61508
  • Power supply 230V/400V
  • Electric limit position switches / position indicator
  • Integrated hydraulic emergency actuation (hand pump) possible
  • Bus connection Modbus/Profibus, others upon request
  • Explosion protection class: ATEX/IECEx
  • Low temperature version: –55°C
  • Submerged (upon request)
  • IP67/IP68
  • Bronze version
  • End positions adjustable on both sides (for ball valves)
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Call us now at +49 2324/398-716 or send us an e-mail with your inquiry at