The DORMA BTS80F EN6 universal floor spring with cement case, adjustable latch action, back check, no hold open. With interchangeable spindle inserts, adjustable closing & latching speed by valve adjustment with mechanical backcheck and fully hydraulic control of the closing action from 180°.
Suitable for installation on fire & smoke check doors (distance to door hinge pivot 36 mm) up to 950mm (W) with a max. 300kg leaf weight.
Extended spindles - Refer FAQ
| Dimensions | Weight |
| 341mm (L) x 78mm (W) x 60mm (H) | 7.1kg |
An additional approval of suitability in connection with the particular fire and smoke check door is required. For the use on legally approved fire door assemblies, the regulations of the respective notice of approval must be complied with.