Dorma floor mechanism (BTS75V) with special valve for ease of closing adjustment

Dorma floor return mechanism (BTS75V) with a special valve for easy closing adjustment.

• Adjustable closing force (magnitude of force) EL 1-4 to provide the right amount of closing force
• Maximum door width: 1100mm
• BS8300/ADM compliant: Minimum fire door width 76.7cm (to EN 3)
• Maximum door weight: 120kg
• 2 valve closing speed control
• Adjustable scan & latch speed
• Delayed action option
• Stable mechanical back-check
• Passed independent test to BS EN 1154
• CERTIFIRE approved for CF127 fire doors
• CE marking