4000 series
  • Heavy duty full feature multi-size commercial door closer for offece buildings,shopping centers,and other commercial applications.
  • Non-sized,2 thru 4 and 3 thru 6
  • Standard adjustable backcheck function
  • Adjustable closing and latching speed
  • Universal application,non-stop for stardard
  • Top-jamb or parallel arm installation
  • Plastic and metel cover for option
  • Silver,Cold,Curo available
  • 5 year guarantee
Model Measurements Power size Max door Weight (kg) Remark
GMQ-4000a 251 54 74 230 19 2~4 65kg Factory preset at size 3
GMQ-4000b 251 54 74 230 19 3~6 120kg




Parallel Arm closer Bracket
  • Fit most overhead hydraulic door closer
  • heavy gauge steel construction
  • Fit all standard arm door closers
  • Small and large all available



Flat Drop Bracket
  • Used when top door rail or top jamb provides insufficient support area for closer
  • fit all overhead hydraulic door closer



Drop Plate
  • Required for most overhead hydraulic door closer
  • Used when drop plate installation is neede



Hold-open Arm
  • Adjustable for any degree of holding within the swing of the door
  • Fit most overhead hydraulic door closer



  • Plastic and metal for option
  • Aluminum,Gold,duro available
  • Others as required