Electric Actuator Spring Failure Closure

In stock
Regular price $ 35,239.05

Cematic S series spring return electric valve actuators (also called fail-safe electric actuators) and tunnel gate valve actuator use a spring-loaded rack and pinion mechanism to provide torque ranges of 50 N‧ma 360 N‧m mechanical, fail-safe, quarter-turn electrical. actuators. When power is supplied, the spring mechanism is compressed to store energy for movement. Once power is lost or removed, the controlled valve or damper will be driven to a fail-safe position (either fail OPEN or fail CLOSE) in clockwise rotation. (CW, standard) or counterclockwise (CCW, optional).

A clutchless manual override is an available option of our spring return electric actuators that provide manual operation when there is a power outage; No clutch or brake is required to switch from electric control to manual operation. If you are interested in our spring return valve actuators.

Feel free to send us an inquiry!


  • Duty cycle: 50% at -40℃ to 40℃, 30% at 41℃ to 65℃.
  • On-Off (Two positions) and Modulating
  • Ambient Temperature: Standard: -30℃ to +65℃ (-22℉ to +149℉), Optional: 40℃ to +65℃ (-40℉ to +149℉)
  • Relative Humidity: 30% to 95%


  • IP68 (7m, 72 hrs), NEMA 4X/5
  • Aluminum Dry Powder Coated


  • AC/DC 24V (NOT available for Modulating)
  • AC 110V, 220V-1 Phase
  • AC 220V, 380V, 440V- 3 Phase (Not available for Modulating)


  • Standard: 2 x 1/2" NPT
  • Optional: 2 x 3/4" NPT, 2 x M20
Download Technical Sheet