dormakaba BTS80 Floor Spring: Heavy Duty, Concealed Door Control
The dormakaba BTS 80 F is a non hold open floor spring designed for heavy duty fire doors in public and commercial buildings. With a fixed power size EN 4 and mechanical backcheck, it ensures controlled door closing while preventing excessive force when opening.
Compatible with single and double action doors, the concealed design enhances aesthetics while maintaining functionality.
This dormakaba floor spring is suitable for fire and smoke doors when installed with the appropriate intumescent kit (sold separately).
Key Product Features:
- Fixed power size EN 4
- Suitable for single and double action doors
- Select from double action or single action
Double action: Non-handed (Universal)
Single action: Left hand (ISO 6)
Single action: Right hand (ISO 5)
- Select with or without the standard spindle
- Concealed design
- Non hold open
- Mechanical backcheck
- Suitable for doors up to 300kg and 1100mm wide
- Valve adjustable closing speed and latching action
- Tested to BS EN 1154
- CE marked
- UKCA marked
- Certifire Approved CF127
- Dimensions: 341mm x 78mm x 60mm
- Weight: 7.1kg
- Cover plate and accessory packs are sold separately
The dormakaba BTS80F Fire Rated Floor Spring
Floor springs provide an effective closing solution for heavy doors, and the dormakaba BTS 80 F is designed as a non hold open model with a fixed power size EN 4. It delivers a consistent closing force, making it suitable for doors weighing up to 300kg and 1100mm wide.
This floor spring is CE marked and Certifire Approved (CF127) for use on fire rated doors. It should be installed with the correct intumescent kit, not included, when fitted to fire doors.
The mechanical backcheck protects doors and surroundings by providing a cushioning effect of a door is opened forcefully. With adjustable closing speed and latching action, the dormakaba BTS80 can be fine tuned to meet specific site requirements, delivering a highly efficient and reliable door control solution.
The BTS 80 floor spring is concealed within the floor, preserving the architectural aesthetics of a space while delivering robust performance.
Handing Options:
The dormakaba BTS80 floor spring is available in non handed double action or handed single action options.
To determine the correct handing for a single action installation:
Stand on the pull side of the door.
If the hinges are on the left, the door is DIN Left (ISO 6).
If the hinges are on the right, the door is DIN Right (ISO 5).
Complete Your Installation:
The dormakaba BTS80F floor spring is supplied as a mechanism only, with or without the standard spindle. Depending on your installation requirements, additional components may be needed for new setups or maintenance purposes.
- Intumescent Kit: Essential for fire rated applications.
- Cover Plate: Available individually or as part of an accessory pack.
- Accessory Packs: Includes a cover plate, bottom strap, top centre, and fixings.
When selecting additional components, ensure compatibility with your single action or double action floor spring setup. If you need guidance, our technical team is available to assist in choosing the correct options.
Find The Perfect Floor Spring for Your Door
The BTS80 dormakaba floor spring is a powerful and reliable choice for fire rated single or double action doors that do not require a hold open function.
For facilities requiring further functionality, dormakaba offers a comprehensive range to suit different operational needs:
- BTS80EMB with Electromagnetic Hold Open: Ideal for high traffic areas, allowing controlled hold open functionality for barrier free movement.
- BTS80FLB Electromagnetic Swing Free: Suited to healthcare environments, enabling easy door operation with a natural feel.
- BTS75V Adjustable Power Size (EN 1-4): A versatile option with variable closing force.
- ITS96 Overhead Concealed Door Closer: A discreet alternative where a floor spring is not necessary, but a concealed door closer is preferred.
Explore our full range of door closers to find the right solution for every door in your facility today.
