The SARGENT 421 is a revolutionary door closer that provides the highest performance of any track type door closer made today. Its innovative cam action design applies the closing forces in exactly the proper locations for smooth and efficient operation. The result is a door that is light to open and still has more than enough power to close.

Features

• 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

Fasteners

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

Valves

• 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

Innovation

• 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