spring return electric actuator Valve

MODEL#: spring return electric actuator ValveBACK TO LIST

  • In additional to the normal function, these actuators are designed to provide fail-safe positioning of valves and dampers upon loss of supply voltage. A mechanical spring set is utilized to position the controlled device to either the fully OPEN or fully CLOSED position without any external power source. A mechanical BUFFER employed at the end of the spring stroke for two-position control units to reduce the dynamic effects of the spring return system. A clutch-less, leverless manual override design provides full-time manual positioning of the controlled device.
  • Duty cycle rating:50% (Conform to IEC standard)
  • Two-position control
  • Temperature:-30℃ ~ +65℃ / -22℉ ~ +149℉
  • Humidity:30% ~ 95%
  • IP67、NEMA 4X:Water-proof and dust-proof enclosure.
  • Material:Dry powder coating aluminum alloy.
  • Gear trains have been already lubricated sufficiently with anti-high temperature lubricant at the factory.
  • All models have continuous mechanism position indicator on the top of actuator cover.
  • Certifications: CE , (Conforming to the test standard of outdoor usage.),RoHS
  • Option Items: Space Heater,Heater thermostat,Additional limit switches,Current position transmitter,Floating controller
  • standard operating direction: fail clock wise on loss of power
  • optional operating direction: fail counter-clock wise on loss of power
  • manual override is optional
  • potentiometer unit: 1k or 5k
  • various voltage: AC/DC 24V,AC110/220V 1-phase , AC 220/380/440V 3phase
  • conduit entrance standard: 1/2"NPT , Optional:3/4" NPT M20
  • Enclosure: Nylon coating, E.D. coating, Expoxy coating
  • Important Notices and Maintenance
  • Manual Override After using the manual override for positioning, the user must manually drive the actuator back to its fully-closed position before the actuator restarts. This is a safety feature.
  • Check for correct voltage prior to wiring.
  • Turn power off before servicing or for maintenance purpose
  • Use sealant to seal conduit connections after wiring to prevent dusting or water contamination
  • The angle of electric actuator install action must b between 0-180 degree C. Do not install upside down or below the horizontal.
  • Not intended for vacuum spaces and avoid installing near explosive atm ospheres.
  • Electuator actuators should be placed at clean and dry place for storage, and protected with outer carton from being affected by great temperature difference or serious vibration.
  • connect the groud wire to PE inside the electric actuator.
  • The warranty period is one year