UL ANSI Grade 2 Fireproof Zinc Alloy Knob Lock - Model DDLK012
1. Product Overview
The DDLK012 UL ANSI Grade 2 Fireproof Zinc Alloy Knob Lock by D&D HARDWARE is a high-performance door lockset engineered for superior security, durability, and fire resistance in residential and commercial spaces. As an ANSI Grade 2 certified solution, it exceeds 400,000 usage cycles and passes UL 3-hour fire tests, making it ideal for entryways requiring robust protection. Crafted with zinc alloy construction and stainless steel components, this door knob lock integrates seamlessly with D&D’s door hardware ecosystem (including door hinges, door closers, and door accessories), delivering both safety and aesthetic appeal.
In residential entryways, it provides ANSI Grade 2 security and fire protection, integrating with door closers for smooth operation. For commercial offices, its durable zinc alloy construction withstands high traffic, pairing with door hinges and door stops. In healthcare facilities, UL fire resistance ensures safety during emergencies, while easy rekeying (via removable core cylinder) simplifies access management.
7. UL ANSI Grade 2 Fireproof Zinc Alloy Knob Lock - Value for Buyers
Enhanced Safety & Compliance: ANSI Grade 2 and UL fire resistance meet strict industry standards, ensuring protection and code compliance for properties.
Long-Term Durability: Zinc alloy and stainless steel components resist wear, corrosion, and forced entry—reducing maintenance/replacement costs.
Systematic Procurement: Integrates with D&D’s door locks, door hinges, door closers, and accessories, enabling buyers to source cohesive door hardware from one supplier—streamlining logistics.
Design Versatility: Zinc alloy construction allows diverse finishes (customizable) to match any architectural style, enhancing property aesthetics.
Easy Installation & Maintenance: Removable rosettes and core cylinder simplify installation, servicing, and rekeying—saving time for contractors and facility managers.
8. UL ANSI Grade 2 Fireproof Zinc Alloy Knob Lock - Certifications and Compliance
The DDLK012 Knob Lock meets rigorous industry standards for security, durability, and fire safety:
D&D offers OEM/ODM customization for the DDLK012 knob lock to meet project-specific needs:
Finish Customization: Add custom finishes (e.g., polished chrome, oil-rubbed bronze) to match door handle and architectural aesthetics.
Cylinder Customization: Opt for master key systems or unique keyway configurations for enhanced access control in multi-unit properties.
Material Upgrades: Choose high-grade zinc alloy or stainless steel variants for extreme environments (e.g., coastal areas, industrial facilities).
Branding: Incorporate custom logos or engravings on knobs/rosettes for property developers or brand-specific projects.
10. UL ANSI Grade 2 Fireproof Zinc Alloy Knob Lock - Production Process & Quality Control
Material Sourcing: Procure high-quality zinc alloy and stainless steel, tested for corrosion resistance and mechanical strength.
Precision Machining: Use CNC machining to shape knobs, rosettes, cylinders, and latch components—ensuring dimensional accuracy for ANSI/UL compliance.
Finishing & Coating: Apply selected finishes with strict adhesion testing to ensure durability and aesthetic consistency.
Assembly: Integrate the knob, rosette, cylinder, and latch mechanism, testing for smooth operation and secure locking functionality.
Quality Inspection: Each lock undergoes functional testing (usage cycles, fire resistance simulation) and visual checks for defects—critical for ANSI Grade 2/UL compliance.
Certification Testing: Random samples are tested against ANSI, UL, and BHMA standards to verify performance in security and fire scenarios.
Packaging: Pack in protective white/color boxes or custom cartons to prevent damage during shipping, with clear labeling for easy identification in logistics.
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