D-4550 Door Closer

The D-4550 Series AL Closers are heavy-duty door closers constructed of high-silicon aluminum alloy for installation on exterior and interior doors that are subject to high use and potential abuse. They are designed and engineered for reliability and superior performance. The commercial applications for which these closers are ideal include schools, medical facilities, institutions, and hospitals as well as office buildings and any entrance door with high foot traffic.


  • Full hydraulic checking controls the door through the full opening and closing cycles
  • Adjustable backcheck upon opening and adjustable general and latch speeds through closing cycle
  • Heavy duty forged arms are interchangeable
  • Adjustable Delayed-Action speed through closing cycle
  • Many heavy duty and extra heavy duty configurations available