SDS 550NV Variable Action Floor Spring
Mechanism and box only
For single and double action doors

Certifire approved CF 259
CE approved :3:5:3/6:1:1:4:

Large door adjustment range
Height: 6 mm
Lateral: 10 mm
Length: 10 mm

Variable adjustable EN 3-6 closing force guarantees flexible use even for great wind loads or heavy doors
With backcheck
Safety valve prevents overloading
Overall depth of only 54 mm – utilisation also possible for existing doors

Leaf weights up to 300 kg are possible
Leaf widths up to 1400 mm for ideal passages

Adjustable latching action guarantees secure closing
Closing range from 175 degrees
All adjustments – even the closing force – are possible from above Convenient and secure for the user
Progressive hydraulic hold-open between 80 – 165
Integrated closing delay prevents the door from closing too quickly e.g. facilitates goods transport
Integrated back check prevents damage and/or the door from slamming open uncontrolled