Dorma BTS 80 Floor Spring
The Dorma BTS80 floor spring for self-closing doors, with adjustable hold open facility or delayed action between 75 and 175 degrees. With the correct selection of accessories it enables use in a variety of applications including; single or double action, centre pivoted or off-set pivoted doors.
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- Fixed size spring strength (power size) EN 3/4/6
- Max door width: 950mm (EN 3) 1100mm (EN 4) 1400mm (EN 6)
- Max door weight: 300kg
- Adjustable closing speed
- Fixed backcheck
- Delayed action (selectable alternative to hold open)
- Adjustable hold-open (any angle between 75 and 100 degrees)
- NOT suitable for fire doors
- Successful independent testing to BS EN 1154