FEATURE :
– Suitable for maximum 1.000mm
  wide door leaft of single direction
  opening door, the maximum door
  weight is 65 kg ( DC/ONS 870 FR )
  & 120 kg ( DC/ONS 880 FR )
– Precisely sealed, preventing oil leakage
– High quality die-casting aluminium
  alloy, protected with two-layer
  bright paint.
– Two hydraulic press valves
  controlling two stage door closing
  speed automatically, 180 degress
  fully hydraulic control, and hold
  open at 90 degrees
– 75 minutes fire rated, UL approved