Dorma BTS 80F Floor Spring
The Dorma BTS 80F floor spring is for self-closing doors, 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 & fire doors.
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- Fixed spring strength (power size) EN 4/5/6
- Max door width: 1100mm (EN 4) 1250mm (EN 5) 1400mm (EN 6)
- Max door weight: 300kg
- 2 valve control of closing speed
- Fixed backcheck
- Adjustable sweep speed
- Successful independent testing to BS EN 1154
- Suitable for fire doors CERTFIRE approved cert no. 128.