NGP 420 Automatic Door Bottom ...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$177.00
$141.03
NGP NGP 420 Automatic Door Bottom with Neoprene Seal, Heavy Duty Surface NGP-420

NGP 420 Automatic Door Bottom with Neoprene Seal, Heavy Duty Surface

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Model: NGP-420
Selected Finish is

In Stock (leaves warehouse same day if ordered before 3pm ET)

$177.00
$141.03
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NGP 420 Automatic Door Bottom with Neoprene Seal, Heavy Duty Surface

Product Features

  • BHMA certified to ANSI/BHMA A156.22, 1,000,000 cycle test-grade 1, as well as ANSI/BHMA A156.22 performance tests for heat and cold.
  • Aluminum alloy 6063, T5 temper
  • Synthetic rubber polymer blend: PVC, Nitrile rubber (NBR), and Chloroprene closed cell advanced elastomeric foam
  • Very good abrasion resistance, tensile strength and memory
  • Flame resistant
  • Moisture resistant
  • Temperature range -20°F to 200°F
  • Good resistance to ozone, sunlight and aging
  • Mounts on push side of door
  • Use with a threshold for maximum sealing capability
  • Nylon brush recommended for carpet applications where no threshold is provided
  • Specify exact net length required to avoid field sizing
  • 36" and longer may be cut up to 4" in the field, under 36" should not be cut in the field, order net length
  • Minimum length 11", maximum length 60"
  • End caps furnished standard
  • For half mortise applications specify HM in item number prior to finish (ie: 420NHMDKB)
  • 7/8" max drop

Materials and Finishes

  • Anodized Aluminum
  • Gold
  • Dark Bronze

Manufacturer Resources

Product Specs

Product Group:
Door Trim and Accessories
Product Subgroup:
Door Bottom Sweeps and Door Shoes
Product Type:
Automatic Door Bottoms
Subcategory:
Gaskets & Weatherstripping
Commercial/Residential:
Commercial
Product Category:
Door Trim and Accessories

NGP NGP-420 – Frequently Asked Questions

1) What is the NGP 420 automatic door bottom used for?
The NGP 420 provides automatic sealing at the bottom of doors when closed. The neoprene seal drops down to contact the threshold, blocking air, sound, smoke, and light infiltration.
2) What door types and thicknesses work with this door bottom?
Compatible with wood and hollow metal doors. Verify door thickness and width requirements with manufacturer specifications. Check that door bottom rail has adequate clearance for surface mounting.
3) How does the automatic operation work?
When door closes, the actuating mechanism triggers the seal to drop down automatically. When door opens, the seal retracts upward to clear the threshold and floor.
4) What finish options are available?
Verify available finishes with product specifications. Common options include aluminum mill finish, dark bronze anodized, and other architectural finishes to match door hardware.
5) Is this suitable for heavy-duty commercial applications?
Yes, designed for heavy-duty surface mounting applications. The robust construction handles frequent door operation in commercial environments.
6) Does this meet fire door requirements?
Check manufacturer listings for fire door compatibility and ratings. Verify local code requirements for automatic door bottoms on fire-rated assemblies.
7) Are replacement parts available for the NGP 420?
Replacement neoprene seals and internal mechanisms are typically available. Contact manufacturer for specific part numbers and availability for ongoing maintenance.
8) How is this door bottom installed?
Surface mounts to door bottom rail with screws. Follow manufacturer template for proper positioning. Ensure adequate clearance between door and threshold when seal deploys.
9) What maintenance does the automatic mechanism require?
Periodically check seal deployment and retraction. Clean debris from mechanism. Lubricate moving parts as recommended. Replace worn neoprene seals when sealing performance decreases.
10) Are there similar models in the NGP line?
NGP offers various automatic door bottom models with different seal materials and mounting options. Compare specifications to select the best model for your application requirements.
11) What floor conditions work best with this door bottom?
Works on smooth, level floors and thresholds. Uneven surfaces may prevent proper seal contact. Check threshold height and door clearances before installation.
12) What are the key measurements needed for ordering?
Measure door width, door thickness, and bottom rail dimensions. Verify clearance between door bottom and threshold. Check manufacturer sizing chart for proper model selection.
How fast can I get the NGP NGP-420 delivered?
Most orders ship the same day from our distribution partners, with quick delivery throughout the continental U.S. Need it urgently? Contact Us for expedited shipping options.
Can I return it if it doesn’t work for me?
Yes—ZenSupply offers a hassle-free return policy. If the product isn’t the right fit, reach out to our support team for a return authorization or setup a return by following our return instructions.
Does the NGP NGP-420 come with a warranty?
Absolutely. The NGP NGP-420 is backed by a manufacturer’s warranty. For full warranty terms, check the product documentation or Contact Us.
How do I get technical support or installation help for the NGP NGP-420?
You can call, text, or email our expert support team for fast answers. We’re here to help with product selection, installation tips, and troubleshooting. Contact Us
Why buy the NGP NGP-420 from ZenSupply?
ZenSupply makes it easy to get the commercial door hardware you need—fast shipping, expert support, and rewards on every order. Our team is always ready to help you choose the right product for your project.
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