Floor spring for double-action doors

The BTS 84 is a double-action floor spring that has been specially developed for the aluminum and toughened glass door industries. The BTS 84 incorporates many features of other DORMA BTS closers, with the addition of reduced depth and a range of accessories designed for aluminum door fabricators and toughened glass door manufacturers.

Certified manufacturer to ISO 9001.

For double-action doors

Specially designed for the movement patterns of double-action doors, the DORMA BTS 84 can be easily adapted to individual requirements. With an installation depth of just 40 mm, it offers the advantage of requiring only a shallow pocket, thus enabling problem-free installation.

Complement to RTS concealed overhead door closer

This unit is intended to complement our internationally acclaimed RTS concealed overhead door closer by providing the shopfitting industry with a DORMA quality floor spring designed for their specific needs.

Benefits for the trade/distributor

• Outstanding value for money
• Available with various spring strengths to meet specific requirements

Benefits for the installer/fabricator

• Easy installation thanks to shallow design
• Easy to adapt to individual requirements with dual valve control 130° to 0° and 130° to 20°
• Interchangeable spindle inserts available to suit site conditions

Benefits for the architect/specifier

• Concealed unit for almost invisible installation
• Minimum floor recess dimensions
• Proven, robust unit for door weights up to 100 kg

Benefits for the user

• Thermoconstant, smooth operation
• High mechanical efficiency for easy door opening
• Optional single-point hold-open

Product features

• Concealed unit
• Special shallow design
• Easy installation
• Optional hold-open.