Series A
Radius L.L.C.
4922 Technical Drive
Milford, MI 48381
Phone: 248.685.0773
For Pricing and
Contact Radius

Radius Series KEH Spring Return Electro-Hydraulic Actuator

The Radius Electro-Hydraulic Spring Return actuators are specifically designed for use on quarter turn valves and dampers. The unit utilizes a hydraulic spring return actuator assembled to a compact hydraulic unit. When electric power is supplied the control box opens a pilot valve and signals the pump to deliver hydraulic fluid to the actuator thus opening the valve. When the valve is fully open the end of travel limit switch contact is made and the pump stops and valve remains in this position. On loss of power the pilot valve diverts hydraulic fluid out of the actuator with the aid of the springs and closes the valve.


  • The actuator can be used to open or close valves/dampers on loss of electrical signal.
  • The actuator is designed to operate on electricity only.
  • The actuator has ISO 5211 VDE/VDI mounting surfaces.
  • The actuator can be placed in operation vertically or horizontally.