Dorma BTS80F Floor Spring

The BTS80F from Dorma is a floor spring suitable for heavy doors (up to 300kg), as well as fire and smoke check doors. Available in three different EN power sizes (4, 5 and 6), the BTS80F has variable latching action, variable closing speed, delayed closing action and mechanical backcheck. Floor springs are ideal in locations where overhead door closers would spoil the aesthetics and where there is a possibility of vandalism.

• EN power size 4, 5 and 6 available
• Adjustable closing speed
• Adjustable latching action
• Fixed mechanical backcheck
• Available in single- and double-action versions
• Mechanical efficiency unaffected by temperature
• Certifire approved - CF127 certificate
• CE marked to BS EN 1154
• Full classifications:
  • EN 4: 4 | 8 | 4 | 1 | 1 | 4
  • EN 5: 4 | 8 | 5 | 1 | 1 | 4
  • EN 6: 4 | 8 | 6 | 1 | 1 | 4