* Image may not reflect selected features

EHPS Series

Electro-Hydraulic Power Servo

The EHPS is no longer an active product. It has been replaced by the VariStroke servo system. The EHPS is used on mechanical-drive or generator-driven steam turbines to control power cylinders. For support, please contact one of our Woodward global distributors.
Product Type

this product is no longer sold. You'll find replacement products below. Need help?


Industrial Servovalves

  • Application Notes
  • Brochure
  • Product Specification
  • Software Manual
  • Technical Manual
  • Software
The Electrohydraulic Power Servo (EHPS) has been replaced by the VariStroke servo line. 
The Electrohydraulic Power Servo (EHPS) is a fully integrated three stage servo valve designed to drive low-pressure steam turbine control
valve cylinders. The EHPS, in conjunction with a new or already installed steam valve cylinder, provides the linear actuation force to operate steam turbine control valves or valve racks. This servo can be configured to drive single or double acting actuators, and to use the system’s turbine lube oil supply, or a separate oil source (5.5–17.2 bar, 80–250 psi).

How can we help?

Download Manuals

Downloads & Manuals

Software and information is available on

Product History Lookup

Product History Lookup

Look up your Woodward product by serial number.

Woodward Support


We're here for you, call, email, or open a helpdesk ticket.