• Floor spring with adjustable closing force for large and heavy doors
  • In compliance with EN1154, size EN2-4
  • 1,000,000 cycles tested
  • Suitable for fire and smoke protection doors
  • For single and double action doors up to 170kg

Characteristics of DC477:

  • From 175° in both door swing directions with hydraulic control from 150°
  • Two thermodynamic valves for consistent performance
  • Adjustable door speed and latching speed through top regulating valves
  • Back-check
  • Cast Iron body
  • Adjustments in all directions with in the cement box
  • Cement box is hot zinc plated
  • Cover plates and eyelets made in polished or Satin Satinless Steel and Polished Brass
  • Interchangeable spindle from 0 to 30mm
  • Available without hold-open or with hold-openangle 90°, 105°
Technical Details
Adjustable closing force  EN2-4
Door width up to  1100mm
Door weight up to 170kg
Max. opening angle 175° (Max. 150° in case of no hold-open)
Closing speed Variable between 150°-15°
Latching speed Variable between15°- 0°
Back-check Mechanical
Weight 5.4kg
Height 70mm
Length 277mm
Width 110mm
Body adjustment within cement box Vertical 9mm, side 4mm, front 10mm, angular 4°
DIN-direction Left/Right handed double-action doors
Hold-open mode 90°/105°/Non hold-open
In compliance with EN1154
CE marking for building products Yes
Fire and smoke protection Yes
The advantages at a glance
Customer segment Advantages
Project planners
  • Extensive range of uses: Fire and smoke protection doors as well asstandard doors-
  • Hold-open at 90°,105° and non hold-open version-
  • Variety of available spindles: squared Italian, rectangular German-
  • Architectural finishes: Cover plates and eyelets in Polished SatinlessSteel, Satin Satinless Steel, Polished Brass
  • Universal for left/right handed and double-action door
  • Overpressure relief valve to protect unit against abuse-
  • Large range of adjustment within cement box to solve possiblealignment problems on the site without taking down the door
  • Reduced inventory costs due to modular product range-
  • One single product suitable for a large variety of mounting positions
  • Complementary accessories available for the whole product range
  • Ideal for residential interiors, thanks to adjustable opening/closingforce that makes opening/closing easy
  • Adjustable operating force to meet door construction requirementsand user needs
  • Back-check feature offers optimum protection for doors and walls
  • Easier door opening and improved accessibility due to rapidlydecreasing opening force (Cam Motion )