Pemko 420APKL Full Mortise Automatic Door Bottom for Hollow Metal Doors with PemkoPrene Insert

Pemko 420APKL Concealed Automatic Door Bottom 
The 420 Series Full Mortise Automatic Door Bottom is specifically designed for hollow metal doors with a 13/16" inverted channel. It features a heavy-duty mechanism for smooth operation and is fitted with two fire-rated rubber seals. This door bottom prevents drafts, dust, moisture, smoke, fire, and sound from entering the gap under the door. It can be easily cut in the field for additional adjustment. The aluminum casing is fully mortised, maintaining the appearance of the door alleviating the need for end plates.

All sizes other than 36" are special order. Therefore once ordered they cannot be canceled, returned or exchanged.

Pemko automatic door bottoms consist of an aluminum case which surrounds a movable drop bar seal. The drop bar seal is actuated by a plunger which contacts the jamb as the door is closing, forcing the drop bar seal down against the floor or threshold.

Lead-time & Sizing:
»  36" Usually Ships in in 1-2 business days.  
»  All other sizes Usually ship in 1-2 Weeks.  Special items cannot be canceled, returned or exchanged.

• Automatic door bottom for hollow metal doors with inverted channel
• Maximum drop seal is 1/2"
• Recommended gap is 3/8"
• Smoother action positive seal mechanism: Aluminum case encloses a movable drop-bar seal actuated by a jamb-contacting plunger during door closure, providing an effective seal
• Fitted with set of fire rated double rubber seals
• Drop-bar seal actuation mechanism (all models) ensures hinge-side actuation, preventing seal skidding and door hang up during closure
• Provided at NET length
• Can be trimmed down by as much as 2" in the field (stock lengths only). If non-stock sizes are ordered, order must note need to trim 2 inches from the size ordered
• Used on hollow metal door and does not come with end plates
• Requires a hole for the plunger to extend through the hinge side of the door edge

Technical:

• 1 3/8"
• Height: 13/16"
• Base Material:  6063-T6 Aluminum Alloy and Temper Retainer
• Finish: Mill Aluminum 
• Fasteners: PHSMS #6 x 5/8"
• Patent: U.S. Patent Number 6,125,584.
• Certifications: 
  • GREENGUARD Gold Certified
  • UL 1784 - Standard for Air Leakage Tests of Door Assemblies and Other Opening Protectives
  • UL 10C - Standard for Positive Pressure Fire Tests of Door Assemblies
  • ASTM E-283-04 (2012)
  • ASTM E 90-2009
  • ANSI/BHMA A156.22 Door Gasketing and Edge Seal Systems
  • BHMA Certified 

Pemko Manufacturing # 420APKL Concealed Automatic Door Bottom
For a typical 1 3/4" thick hollow metal door with an inverted (recessed) channel at the bottom.

Pemko automatic door bottoms consist of an aluminum case which surrounds a movable drop bar seal. The drop bar seal is actuated by a plunger which contacts the jamb as the door is closing, forcing the drop bar seal down against the floor or threshold.