DC 477 – Floor spring with Cam-Motion® technology


  • Floor spring with adjustable closing force for large and heavy doors
  • Certified in compliance with EN 1154, size 2-4
  • Suitable for fire and smoke protection doors
  • For double and single action door up to 170kg


  • Hydraulic control over 175⁰ in both door swing directions
  • Two thermodynamic valves for consistent performance
  • Adjustable door speed and latching speed from top regulating valves
  • Adjustments in all directions within the cement box
  • Available with hold-opening angle 90⁰, 105⁰ and without hold-open


  • Cover plates and eyelets polished stainless steel

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