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Concealed Recessed Mount Automatic Drop Down Fire Rated Door Bottom Seal Strip
- Product Information
Brushed Aluminium
Black Aluminium
White Aluminium
DDBS002 Automatic Drop‑Down Fire‑Door Seals Concealed Weatherproof Door Bottom Seal Strip
DDBS002 concealed recess‑mount automatic drop‑down fire‑door bottom seal strip. Recessed‑fit housing installs inside pre‑milled door‑leaf groove, fully concealed after installation. Spring‑actuated fire‑resistant sealing insert. Seal retracts into housing when door opens; drops down automatically upon door‑closure to deliver fire‑proof, smoke‑seal, sound‑proof and weather‑proof concealed door‑bottom gap sealing. Specially designed for fire‑rated wooden, metal and steel door‑leaf assemblies. Standard bars support onsite cut‑to‑length. Custom housing finish and custom length available for large‑volume concealed fire‑door tender orders. Monthly production capacity reaches 185,000 units for B2B wholesale architectural concealed fire‑door hardware supply projects.
| Specification | Parameter |
|---|---|
| Product Type | Concealed Recessed‑Mount Automatic Drop‑Down Fire‑Rated Door‑Bottom Seal Strip |
| Operation | Spring‑actuated drop‑down & retract, concealed recess‑groove installation inside door leaf |
| Material | Recessed‑Fit Aluminium Housing + Fire‑Resistant Spring‑Actuated Sealing Insert |
| Core Functions | Fire‑proof, Smoke‑seal, Sound‑proof, Weather‑proof concealed door‑bottom gap sealing |
| Application | Fire‑Rated Wooden / Metal / Steel Door‑Leaf Assemblies, Institutional & Commercial Concealed‑fit Fire‑Safety Projects |
| Production Capacity | 185,000 Units / Month |
Application Scenarios
Institutional Concealed‑Fit Fire‑Door Installations
Recessed concealed automatic drop‑down fire‑door seal for institutional fire‑rated door‑leaf assemblies. Housing sits fully hidden inside milled door‑bottom groove for clean concealed visual appearance. Spring‑retract mechanism prevents floor abrasion; achieves fire‑proof, smoke‑seal, sound‑proof and weather‑proof sealing for hospital, school and public‑building fire‑compartment door‑sets.
Commercial Concealed Fire‑Safety Door Systems
Concealed‑mount fire‑rated door‑bottom gasket for office, hotel commercial fire‑rated wooden, metal and steel doors. Requires pre‑milling groove inside door leaf. Ideal for projects demanding neat concealed hardware look while meeting fire‑smoke compartment safety specifications.
Concealed‑Fit Fire‑Door New‑Build & Architectural Tender Projects
Standard‑length bars for onsite cut‑to‑length, custom housing finish & custom length for bulk concealed fire‑door orders. Suitable for fire‑safety new‑build, refurbishment and concealed fire‑door hardware tender specification packages.
Product Characteristics
Concealed recess‑groove installation; aluminium housing fits into pre‑milled door‑leaf bottom groove, completely hidden after assembly for clean concealed aesthetic effect
Spring‑actuated fire‑resistant sealing insert: seal retracts inward into housing while door opens to avoid floor scratching; drops down automatically at door‑closure to build fire‑smoke barrier
Multi‑functional fire‑safety performance: fire‑proof, smoke‑seal, sound‑proof and weather‑proof for concealed‑fit fire‑door bottom compartment gaps
Standard‑length bars can be onsite cut‑to‑length to match actual door‑width dimension; multiple standard aluminium housing surface finishes available
Developed for fire‑rated wooden, metal and steel door‑leaf assemblies, fit institutional and commercial concealed‑fit fire‑safety building applications
Custom length & custom housing finish available; monthly capacity 185 000 units for B2B concealed fire‑safety hardware wholesale orders
Warranty & Customization
Standard quality warranty against manufacturing defects of recess housing, spring mechanism and fire‑resistant sealing insert
Bulk wholesale supply, custom unit length and custom housing finish for concealed‑fit fire‑safety architectural tender projects
2D installation milling drawing and fire‑performance specification datasheet available for tender submission documentation
Frequently Asked Questions
What is special about DDBS002 concealed fire‑door bottom seal?
DDBS002 is recess‑groove concealed‑mount automatic drop‑down fire‑door seal. It needs pre‑milled groove inside door‑leaf, housing fully hidden. Spring‑actuated fire‑resistant insert provides fire‑proof, smoke‑seal, sound‑proof and weather‑proof sealing.
What installation requirement does DDBS002 have?
Requires pre‑milling dedicated recess groove on door‑leaf bottom. It is concealed‑fit type, not pure surface‑mount seal. Standard bars support onsite cut‑to‑length.
Which door‑leaf assemblies suit DDBS002 concealed fire‑rated seal?
Optimized for fire‑rated wooden, metal and steel door‑leaf assemblies for institutional and commercial concealed‑fit fire‑safety projects; custom finish & length supported for bulk wholesale orders.
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