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skip to Dorma Floor Spring BTS 80 (Mechanism Only)

Dorma Floor Spring BTS 80 (Mechanism Only)

£443.99

(£369.99 ex VAT)

sku: L13536
  • Suitable for both single and double action door applications
  • Mechanical backcheck feature protects against opening impacts
  • Hydraulically adjustable closing speed for tailored operation
  • Integrated delayed action ideal for high-traffic or accessible areas
  • Adjustable hydraulic hold-open function between 75° and 175°
  • Supports heavy door weights up to 300kg
  • Non-handed design for universal installation on left or right-handed doors
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When ordering multiple Keyed Alike locks, only 1 set of keys are provided as all additional locks are made to work from that key.

If ordering 4 or more keyed alike locks you can have them set up as different groups. If Required: Let us know the details in the "Specific Key Requirements" field above.

Each group of locks will then receive keys.

The Dorma BTS 80 is a high-performance floor spring mechanism designed to provide concealed and reliable door control in demanding environments. This heavy-duty unit is suitable for use with both single action and double action doors, offering a versatile solution for varied architectural requirements.

This mechanism features several integrated hydraulic functions to ensure safe and efficient door operation. The mechanical backcheck prevents the door from opening too fast or hitting the wall, while the delayed action feature provides extra time for users to pass through before the closing cycle begins. The closing speed can be precisely adjusted via a valve to suit specific environment needs.

Typically used in commercial, retail, and public buildings, the BTS 80 is designed for longevity and can support door weights up to 300kg. As this is the mechanism only, it is commonly used as a direct replacement part for existing installations or as the core component of a new system when paired with a compatible cover plate and spindle set.

For applications requiring a fire-rated solution, users should specify the BTS 80 F model.

FAQs

No, this product is the mechanism only. To install a functional door spring, you will also need to purchase a separate accessory kit (for either single or double action doors), which includes the stainless steel top plate and necessary mounting hardware.

The Dorma BTS 80 is designed for heavy-duty applications and can support a maximum door weight of 300kg. It features an EN 4 power size, making it suitable for large and heavy internal or external doors.

This versatile mechanism offers several adjustment features including adjustable closing speed, a delayed action function to assist passage, and built-in backcheck to prevent the door from opening too far. It also includes a hydraulically adjustable hold-open function.

This specific BTS 80 model is not fire-tested. If your installation requires a fire-rated solution, you should select the Dorma BTS 80 F, which is the version specifically designed and approved for fire door applications.