Long-life, attractive door technology solutions

Dorma BTS 84 Floor Spring

The BTS 84 is a double-action floor spring which has been specially developed for the aluminum and toughened glass door industries. The BTS 84 has many of the features of the other Dorma BTS closers with the addition of reduced depth and an array of accessories designed for the aluminum door fabricator and toughened glass door manufacturer.


Certified manufactur to ISO 9001.

  • Special shallow design
  • Interchangeable spindles
  • Optional hold-open
  • Door weights to 100kg
  • Easy installation

Product details

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 particular advantage of only requiring 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 giving the shopfitting industry the option of a Dorma quality floor spring designed for their particular purpose.