• Conforms to standards UL 10C and UBC 7-2 for positive pressure fire test
  • UL and cUL listed for use on fire doors                                                                          Note: Any retrofit or other field modification to a fire rated opening can potentially impact the fire rating of the opening, and Sargent Manufacturing Company makes no representations or warranties concerning what such impact may be in any specific situation. When retrofitting any portion of an existing fire rated opening, or specifying and installing a new fire-rated opening, please consult with a code specialist or local code official (Authority Having Jurisdiction) to ensure compliance with all applicable codes and ratings. 
  • 10 Year Warranty 
  • While meeting the 5 lb. ADA requirements, the 421 still provides exceptional force to close and latch door
  • Square spindle provides fool proof arm installation
  • Push or pull installations with the same closer body
  • Adjustable spring power allows 421 closers a size range of 1 through 6
  • Closer bodies are non-handed
  • Designed to meet ADA requirements in push or pull track applications
  • Standard pressure relief valves for both opening and closing cycles protect the
    door & frame from damage caused by abuse
  • High impact non-corrosive one piece plastic covers standard (Optional metal
    cover available)
  • Cover secured by machine screws 
  • All weather fluid allows closer to operate effectively in extreme heat and cold
    without readjustment

Heavy Duty Construction

  • Heavy duty one piece high silicon content aluminum alloy body provides
    corrosion resistance, superior strength and wear resistance
  • Dual pistons provide superior door control and high efficiency
  • 1/2" arm engagement over a 7/16 square spindle ensures a wear-resistant tight joint
  • Full complement roller bearings provide resistance to abuse


  • Machine screws and self tapping screws provided for closer and arm
  • In addition, wood screws supplied when installed on wood doors without through bolts


  • Separate low sensitivity brass control valves offer ability to separately regulate
    door speed, latching, backcheck
  • All valves are captured to prevent accidental removal; adjustable with a
    5/32" Allen wrench
  • Adjustable backcheck protects the door and hardware from damage during the
    opening cycle


  • Innovative cam and dual piston design provides superior performance with the
    aesthetics of a track type closer
  • SARGENT’s revolutionary MicroShield™ available. This antimicrobial silver-based finish coating permanently suppresses the growth of bacteria, algae, fungus, mold and mildew. EPA and NSF approved and FDA listed

Ideally suited for

  • Nursing Homes
  • Office Buildings
  • Schools
  • Healthcare Facilties
  • Commerical Buildings

 Schools  Healthcare  Commercial 


See the 421 in action

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The 421

ASSA ABLOY, the global leader in door opening solutions

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