COVID-19 UPDATE - We are still operating so orders will be fulfilled as normal. Some lead times may be affected due to supplier closure but we are endeavouring to ensure minimal disruption to service.

EF24A - Spring-return actuator 30 Nm, < 75 s, AC / DC 24 V, Open/Close

On request
£313.33 £376.00

EF24A - Spring-return actuator 30 Nm, < 75 s,  AC / DC 24 V, Open/Close

•    IP 54, Manual override with integrated position stop
•    Running time spring < 20 s
•    Control Open/Close with single-wire contact
•    Connection cable FRNC 1 m
•    Spindle driver universal spindle clamp
•    Direction of rotation reversible (right/left)
•    Angle of rotation limit. mech. adjustable

More Information



  • Mode of operation The actuator moves the damper to the operating position at the same time as tensioning the return spring. The damper is turned back to the emergency position by spring force if the supply voltage is interrupted.

  • Simple direct mounting Simple direct mounting on the damper spindle with a universal spindle clamp, supplied with ananti-rotation strap to prevent the actuator from rotating
  • Spindle stabiliser The spindle clamp of the spring-return actuator is equipped ex-works with a spindle stabiliser for stabilising the combination of damper, damper spindle and actuator.
    This is comprised of two plastic support rings and, depending on the installation situation and the spindle diameter, must be left in place or partially or completely removed.

    Long spindle installation :• The use of the spindle stabiliser is necessary with long spindle installation with a spindle diameter of 12 to 20 mm.• The use of the spindle stabiliser is not necessary with long spindle installation with a spindle diameter of 21 to 26.7 mm, and it can be removed.

    Short axis installation :• The necessity of the spindle stabiliser does not apply with short spindle installation; it can be removed or – if the length of the spindle permits it – left in the spindle clamp.
    For additional information, see the Installation instructions.
  • Manual override Manual operation of the damper with the hand crank, locking in any position with the interlocking switch. Unlocking is manual or automatic by applying the operating voltage.

  • Adjustable angle of rotation Adjustable angle of rotation with mechanical end stop.

  • High operational reliability The actuator is overload-proof, requires no limit switches and automatically stops when the end stop is reached.
Manuals & Datasheets
Technical Information

•    Electrical data Nominal voltage AC 230 V, 50/60 Hz
•    Nominal voltage range AC 19.2 ... 28.8 V / DC 21.6 ... 28.8 V
•    Power consumption In operation 9.5 W @ nominal torque
•    At rest 4.5 W
•    For wire sizing 16 VA
•    Connection Cable 1 m, 2 x 0.75 mm2
•    Functional data Torque Motor Min. 30 Nm @ nominal voltage
•    Spring return Min. 30 Nm
•    Direction of rotation Can be selected by mounting L / R
•    Manual override With hand crank and interlocking switch
•    Angle of rotation Max. 95° , can be limited with adjustable mechanical end stop
•    Running time Motor <=75 s (0 ... 30 Nm)
•    Spring return <=20 s @ –20 ... 50°C / max. 60 s @ –30°C
•    Sound power level Motor <=55 dB (A)
•    Spring return <=71 dB (A)
•    Service life Min. 60,000 emergency positions
•    Position indication Mechanical
•    Safety Protection class II Totally insulated
•    Protection mode IP54
•    NEMA2, UL Enclosure Type 2
•    EMC CE according to 2004/108/EC
•    Low-voltage directive CE according to 2006/95/EC
•    Certification Certified to IEC/EN 60730-1 and IEC/EN 60730-2-14 cULus according to UL 60730-1A and UL 60730-2-14 and CAN/CSA E60730-1:02
•    Mode of operation Type 1.AA
•    Rated impulse voltage Actuator 0.8 kV
•    Control pollution degree 3
•    Ambient temperature –30 ... +50°C
•    Non-operating temperature –40 ... +80°C
•    Ambient humidity 95% r.h., non-condensating
•    Maintenance Maintenance-free
•    Weight Approx. 4.3 kg

Manufacturer Belimo