Twin SECO Ni 24 40


Smoke and environmental ventilation.


24 V d.c./ 400 N certified and compliant twin chain drive actuator designed to provide precise and reliable operation for smoke and environmental ventilation applications.

Features and benefits:

  • Certified and tested with specific system profiles to all annexes of smoke vent standard EN 12101–2:2003. Consult manufacturer to ensure it is tested to align with your profile, and that the correct manufacturing process is followed.
  • ‘Frequency of operation’ data logging records every actuator movement.
  • Compact design with variable options for stroke-length.
  • Standard finish is powder-coated grey (RAL 9006); can be customized to suit requirements.
  • Standard flex length is 2000 mm; this can be modified to suit installation requirements.
  • Extensive range of brackets to suit a variety of window systems.
  • Quiet operation with configurable speed control.
  • Soft close feature and electronic switching.
  • Programmable seal relief, up to 20 mm.
  • Optional synchronization; consult manufacturer for details.
  • Made in Britain.
  • CE marked.
  • Also available in a single actuator model (specified separately).


  • Bottom-hung.
  • Top-hung*.
  • Side-hung.
  • Centre-pivot.

*900 mm version is not suitable for top hung applications.

Technical characteristics:

  • Flex: Two core 0.75 mm silicone as standard.
  • Protection level: IP 20 or IP 42.
  • Current draw: dependent on stroke length.
  • Thrust/ close force: 2 x 400 N.
  • Ambient operating temperature: -5°C to +60°C.
  • Seal relief: programmable up to 20 mm.
  • Duty cycle: 22% (approx. 2 mins on, 7 mins off).

General information



RAL 9006.


Any RAL code.



Polyester powder-coated.




1295.5 mm

Stroke: up to 600 mm.

1592.5 mm

Stroke: 601–900 mm.


15 000 cycles

Uniclass 2015

Pr_75_50_02_13 Chain actuatorsPrimary


L10/390 Proprietary windows

L10/31 PVC-U windows

L10/330 Aluminium windows

L10/650 Metal louvres

L10/20 Steel windows

L10/350 PVC-U windows

L10/15 Wood windows

L10/25 Aluminium windows

L10/30 PVC-U windows

L10/45 Rooflights

L10/50 Roof windows

L10/210 Wood windows

L10/10 Wood windows

L10/33 Proprietary windows

L10/310 Steel windows

L10/400 Composite windows

L10/460 Rooflights

L10/480 Roof windows

L10/490 Roof ventilators

Specification data - Chain actuators Enhanced data


Comply with the requirements of BS EN 12101-2.


0–600 mm.


Current draw: 2.0 A.

601–900 mm.


Current draw: 2.4 A.

Electrical supply

24 V d.c.


Sensor control.


Powder-coated RAL 9006, silver grey.

Powder-coated, colour



Four-core flex.

Volt free contact. Replaces standard two-core flex.

Flex length, non-standard.

Consult manufacturer for options and insert requirements.


Product Reference

Twin SECO Ni 24 40


24 V actuators require control from a compatible low voltage unit such as an OS2 SHEVTEC controller or NVLogiQ® PSU and permanent power should not be applied.

3 A controller.

Recommend number of actuators:

  • 600 mm stroke: 1.
  • 900 mm stroke: 1.

30 A PSU.

Recommend number of actuators:

  • 600 mm stroke: 15.
  • 900 mm stroke: 12.


Recommend number of actuators:

  • 600 mm stroke: 2.
  • 900 mm stroke: 2.

OS2 AC controller.

Recommend number of actuators: n/a.

SHEVTEC controller.

Recommend number of actuators:

  • 600 mm stroke: 4.
  • 900 mm stroke: 3.

Opening speed

15 mm/s.

Minimum speed: 8 mm/s (configurable).


Brackets, face fix.

Consult manufacturer for height and offset options.

Brackets, sill fixing.

Consult manufacturer for height and offset options.

Brackets, open inward.

Consult manufacturer for height and offset options.

Ingress protection (IP) rating

IP 20.

IP 42.

Environmental information

Country of product manufacture

United Kingdom


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