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Dorma (BTS80) heavy-duty floor restoring mechanism for doors of special height and weight
Resistance of a fixed size spring (power size) EN 3/4/6
Maximum door width: 950mm (EN 3) 1100mm (EN 4) 1400mm (EN 6)
Maximum door weight: 300kg
Adjustable closing speed
Fixed backcheck
Delayed action (eligible alternative to open booking)
Adjustable opening (any angle between 75 and 100 degrees)
NOT suitable for fire doors
Successful independent test to BS EN 1154
For more information , click here.
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