In shopping centres, factories, warehouses, exhibition halls and other commercial buildings, high-level windows and rooflights can do more than provide natural ventilation. When correctly designed as part of an automatic opening vent system, they can create an opening through which smoke and heat are discharged during a fire. The electric smoke vent window actuator is the drive that opens and closes these windows.
How does an electric smoke vent actuator work?
An actuator converts electrical power into controlled mechanical movement. It is mounted between the fixed frame and the moving sash. When it receives an opening command, the chain or spindle extends and moves the sash to the required position. A closing command reverses the movement.
A typical AOV system includes electric window actuators, a smoke exhaust linkage control box, a fire-alarm interface, manual controls and field wiring. During everyday operation, the windows may be used for natural ventilation. When the control panel receives a fire signal, fire-alarm priority logic commands the designated smoke vents to open. Final system behaviour must follow the approved fire strategy, electrical drawings and local requirements.
Chain and spindle actuator types
Chain window actuators use a flexible chain that extends from a compact body. Their discreet form makes them suitable for many top-hung, bottom-hung and side-hung windows, façade windows and selected rooflights. TDKCQ 24V DC chain actuator configurations cover a 300–800N force range and strokes from 300–1000mm.
Spindle window actuators use a rigid metal screw rod to produce linear movement. They are commonly considered for larger sashes, rooflights and applications that require greater force or rigidity. TDKCQ 24V DC spindle actuator configurations provide 800–2000N push/pull force, 300–1000mm stroke options, and built-in overload and stall protection.
What determines the correct actuator?
The highest-force actuator is not automatically the best choice. Selection should consider the sash dimensions and weight, hinge position, opening direction, required angle or clear opening, installation space, wind load, control method and operating environment. The actuator, brackets, window profile and control equipment must work as one system.
For a project-specific recommendation, provide TDKCQ with the window drawing, sash dimensions and weight, opening direction, target stroke or angle, actuator quantity, control requirements and project location. Certifications and compliance requirements should always be confirmed before specification or purchase.
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