Zero #320, Automatic Door Bottom, Mortised Regular Duty with Neoprene Seal
This Zero International #320 fully mortised, standard duty Automatic Door Bottom creates a tight seal at the bottom of door to prevent infiltration of light, sound, drafts and more. It is fitted with a solid neoprene extrusion with a high quality mechanism that has been successfully tested through 5 million cycles! Can fill gaps up to .5" and is fire rated.
PRICED PER ITEM
Note, this product is priced per range with 18.25" - 36" being the lowest priced range. To determine sizing needed, see How to Measure for an Automatic Door Bottom.
This automatic door bottom is designed to be fully mortised within a hollow interior of a door. It is fitted with a solid neoprene extrusion with a high quality mechanism that has been successfully tested through 5 million cycles!
This model is designed for narrower doors, can be used on doors 1-1/2" thick or thicker.
To determine length needed, see How to Measure for an Automatic Door Bottom.
Installation: Fully mortised aluminum casing. Installation instructions and screws provided.
About Light Spring Strength: Light Spring Strength requires less operating force to activate than standard Strength. Light Spring is compatible with ADA Compliant Doors and can be easily used by those with limited mobility. Casing dimensions remain the same. To purchase, select from options above.
Please note, Images are for illustrative purposes only. They are not actual photos. Therefore, actual colors may vary slightly and size may be enlarged to show detail. See product specs for exact measurements.
This product has a 1 year guarantee against defects in material and workmanship.
Click to view our Full Warranty Policy.
Check out our other Mortised Automatic Door Bottoms.
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QuickShipNo
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ManufacturerZero International
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MPN320
- Product Design
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Mounting TypeFully Mortised
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Door TypeWooden Door
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- Dimensions
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Casing DimensionsCasing measures 1.458" H x .595" W, with two .375" flanges extended on both sides.
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LengthCustom Cut to Size
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Drop SizeUp to .5" Drop
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Suggested Door Cut-Out11/16" x 1-7/16"
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Door Thickness1-1/2" Thick, 1-3/4" Thick
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- Installation
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HandingNon-Handed
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Installation ScrewsInstallation Screws Provided
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SizingTo determine sizing required see 'How to Size an Automatic Door Bottom'
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- Additional Options - Purchase Through Our Office
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Colored End CapsYes
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- Special Features
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Compatible Insert Replacement#320N Neoprene Insert
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- Finishes
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FinishClear Anodized Aluminum (US28)
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- Compliance Details
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Compliance DetailsFire Rated, BHMA Certified
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ANSI DesignationR3B3241
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Warranty1 Year Limited Warranty
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Automatic Door Bottoms utilize a concealed flat spring mechanism and plunger. When the door is closed, a brass plunger is compressed to automatically lower the seal, starting from the hinge side first. This motion ensures a smooth usage even on an uneven surface and prevents drag. The seal is automatically raised upon opening. These automatic door bottoms have been successfully tested through 5 million cycles!
See also About Automatic Door Bottoms.