VS-KA chain actuator for windows and roof windows

Technical terms: Chain actuator · Stroke length · thrust force · Bottom-hung sash

Not sure which variant fits? Foto schicken · Guide: choosing a window opener · Decision table

In brief: The VS-KA chain actuator opens tilt, top-hung and roof windows as well as light rooflights. It delivers 250 to 1,500 N push and pull force with 100 to 1,000 mm stroke and is available in 24 V and 230 V. Price from €65 net including standard bracket set, in stock in Hamburg.

VS-KA chain drive overview

The VS-KA chain drive is the ideal solution for standard applications in ventilation and facade systems. It combines a compact design with reliable performance and is perfectly suited for casement and tilt windows as well as roof windows.

The drives can be integrated into 24 V systems and impress with their quiet, low-maintenance, and durable operation. The entire VS-KA series offers flexible solutions for virtually any requirement: Push and pull forces from 250 N to 1,500 N and variable chain lengths from 100 mm to 1,000 mm (infinitely adjustable depending on the model) can be freely selected via the selection bar. As a versatile Window drive , the VS-KA series is suitable for a wide range of window, roof window and skylight applications in ventilation and façade systems. For use in smoke ventilation systems, the actuator, the window and an approved smoke control panel must be matched to one another and verified for each project – we will be happy to advise you.

Replacement for chain drives from other manufacturers: The VS-KA is a suitable alternative to many chain drives from GEZE (e.g. ECchain, Slimchain, Powerchain), Aumüller (KS2, KS4, KS15), Kingspan STG (LM, CDs, KCD), D+H (KA 34, KA 54), WindowMaster (WMX, WMU) and HAUTAU (SKA, EKA). You will find the right variant in our comparisons: GEZE, Aumüller, Kingspan STG, D+H, WindowMaster, HAUTAU – or in our guide Replacing window drives.

Which actuator for which window size?

Guide values for insulating glass (2 × 4 mm), bottom-hung windows and fanlights with 300 mm stroke, roof windows with 30° pitch, including 1.5× reserve. Snow load is not included. Calculate precisely with the Window actuator calculator.

Matching accessories

The 24 V version needs a control unit; for the 230 V version a ventilation switch is enough.

Calculate chain length (stroke)

Enter the sash height and opening angle – the calculator shows the required stroke and the matching actuators.

Frequently asked questions

What push force and stroke does the VS-KA have?

The VS-KA is available with 250 N to 1,500 N push and pull force and chain lengths from 100 mm to 1,000 mm. You select force and stroke directly in the variant selection.

Which windows is the VS-KA chain actuator suitable for?

For top-hung and bottom-hung sashes, roof windows and rooflights in ventilation and façade applications – wherever a compact, quiet and low-maintenance actuator is required.

Is the VS-KA available in 24 V and 230 V?

Yes, the VS-KA is available in 24 V and 230 V. For 24 V actuators you need a suitable control unit, for example the VS-C24-7A.

Can the VS-KA be used in smoke and heat exhaust (SHEV) systems?

For use in smoke ventilation systems, the actuator, the window and an approved smoke control panel must be matched to one another and verified for each project – we will be happy to advise you.

Related guides

• Connecting a chain actuator
• Electric fanlight opener
• Retrofitting electric window openers
• Calculating chain length and stroke
• Window actuator: 24 V or 230 V?
• Chain actuator for roof windows
• Ventilation control for window actuators
• Installing a window actuator correctly

Technical terms explained: thrust force · Stroke length · Protection class (IP) · Tandem/synchronous operation · safety stay – more in the Window actuator glossary.

Detailed comparisons: GEZE Slimchain · GEZE ECchain · Aumüller KS2 / KS4 · WindowMaster WML 825 (VELUX) · GEZE E 212 (fanlight)