Concealed floor spring with adjustable spring strength EN 3-6

The BTS 80 System (V/VF) has been designed for maximum comfort, safety, and the integration in architectural structure. Thanks to the wide range of accessories, it offers versatile and flexible installation options that are ideal for glass doors, aluminum doors, and fire doors in commercial buildings, malls, hotels, and industrial facilities. The compact body of the door closer also supports door widths up to 1,400 mm and door weights up to 300 kg.

Maximum flexibility due to adjustable spring strength EN 3-6
High load capacity up to 300 kg and max. 1,400 mm door width
Quick and secure installation thanks to integrated level indicator
Improved volume compensation for a smooth closing speed, immune to temperature fluctuations

Product Details

Powerful, hidden performance for demanding commercial applications.
Experience invisible innovation with the concealed floor spring BTS 80 System (V/VF). Whether you need a floor spring with adjustable closing force for fire and smoke protection doors or with adjustable hold-open function, the BTS 80 system (V/VF) has the right variant to match:

BTS 80 V – Versatile and universally applicable with adjustable closing force as well as adjustable delayed closing and hold open function. Perfect for single and double-action doors.
Integrated level indicator ensures fast, accurate installation.
BTS 80 VF – Certified for fire and smoke check doors, with enhanced latch control and adjustable force (EN 3–6) for precise, secure door closing.

Easily adaptable to diverse door designs and requirements, the BTS 80 System (V/VF) simplifies planning, reduces inventory complexity, and speeds up installation.

Key benefits:

Versatility with a streamlined product range
High mechanical efficiency for smooth, controlled operation
A lean, standardized system with compatible BTS accessories to cover nearly all installation needs
Interchangeable spindle inserts for easy on-site customization—even after installation
Long service life ensured by reliable quality in material and manufacturing
Tested and approved by MPA Dortmund and DiBt Berlin