The DDDC044A Heavy Duty Automatic Door Closer by D&D HARDWARE is a UL Listed (3 Hours Fire-Rated, File No.: R40717) solution engineered for commercial applications. Designed with American styling, this closer supports doors with a width range of 610–1370mm and weight capacity of 15–100kg. Featuring a precision cast iron body, forged steel arm, and adjustable closing/latching speed, it ensures reliable, automatic door operation while meeting fire safety standards. It integrates seamlessly with D&D’s door hardware ecosystem (including door locks, door hinges, and panic exit devices), delivering durable performance for high-traffic spaces.
2. Heavy Duty Automatic Door Closer - Technical Specifications
Model Number: DDDC044A
Max. Door Width: 610–1370mm
Door Weight Capacity: 15–100kg
Power Size: Multi Size 1–6
Certifications: UL Listed (3 Hours Fire-Rated, File No.: R40717)
Endurance: 2,000,000 Cycles Guaranteed
Features: Adjustable Closing & Latching Speed, Adjustable Back-Check, Delay Action (Optional), Hold Open Arm (Optional)
Construction: Precision Cast Iron Body, Forged Steel Arm, Heavy Duty Rack (Piston) & Pinion Gear with Needle Bearing
3. Heavy Duty Automatic Door Closer - Product Images and Videos
Watch the video to see the DDDC044A’s heavy-duty operation, adjustable features, and integration with D&D door hardware.
4. Heavy Duty Automatic Door Closer - Product Features & Advantages
American Style for Commercial Doors: Aesthetically fits heavy-duty commercial environments (hotels, offices, warehouses).
UL Listed (3 Hours Fire-Rated): File No.: R40717—ensures compliance with fire safety standards for emergency protection.
Seamless D&D Hardware Integration: Works with door locks, panic exit devices, door hinges, and door stops to create a unified door hardware system for comprehensive building functionality.
5. Installation Steps
Prepare Door & Frame: Ensure door width (610–1370mm) and weight (15–100kg) match DDDC044A specifications. Gather tools (drill, screwdriver, measuring tape).
Mount Cast Iron Closer Body: Attach the precision cast iron closer body to the door or frame, aligning with door hinge and door lock positions.
Install Forged Steel Arm: Connect the forged steel arm to the door and closer body, adjusting linkage for proper door travel.
Adjust Functional Components: Calibrate closing/latching speed, back-check, and optional delay action or hold-open arm.
Verify Operation & Integration: Test door closing, latching, back-check, and ensure compatibility with panic exit devices, door stops, and other door accessories.
6. Heavy Duty Automatic Door Closer - Application Scenarios
The DDDC044A Heavy Duty Automatic Door Closer excels in environments requiring robust performance, fire safety, and accessibility, including:
Hotel Main EntrancesOffice Building CorridorsHospital Patient WingsWarehouse Entry DoorsSchool AuditoriumsRetail Mall Anchor Stores
In hotels, it supports heavy main entrance doors while integrating with panic exit devices for emergency egress. For warehouses, UL fire rating meets safety codes for entry doors, pairing with door hinges for durable operation. In hospitals, barrier-free design ensures accessibility for patients, matching stainless steel door stops and door handles for hygiene and safety.
7. Heavy Duty Automatic Door Closer - Value for Buyers
Heavy-Duty Reliability: Supports doors up to 100kg, eliminating frequent replacement costs in high-traffic commercial spaces.
Fire Safety Compliance: UL 3-hour fire rating ensures occupant safety and reduces liability for property owners.
Customizable Performance: Adjustable speed, back-check, and optional features tailor door operation to space needs, enhancing user experience.
Systematic Procurement: Integrates with D&D’s door locks, hinges, panic hardware, and accessories, enabling buyers to source a complete door hardware solution from one supplier—streamlining logistics.
Barrier-Free Accessibility: Lower opening resistance supports compliance with accessibility standards for handicapped/elderly users.
8. Certifications and Compliance
The DDDC044A Door Closer meets rigorous international standards for safety, performance, and quality:
UL Listed (3 Hours Fire-Rated): File No.: R40717—validates fire protection performance in emergency scenarios.
ISO 9001 Quality System: Produced in D&D’s ISO 9001-certified factory, with strict quality control from material sourcing to final testing.
9. Customization Options
D&D offers customization for the DDDC044A door closer to meet project-specific needs:
Finish Customization: Request custom finishes (e.g., stainless steel, powder-coated colors) to match door handles or architectural themes.
Optional Features Integration: Add or modify hold-open arm, delay action, or back-check settings to align with specific space requirements.
Branding: Incorporate custom logos or engravings on the cast iron body for brand-aligned commercial projects.
10. Production Process & Quality Control
Material Sourcing: Procure high-grade cast iron and forged steel for the body and arm, ensuring strength and durability for heavy-duty use.
Precision Manufacturing: Use CNC machining to create the cast iron body, forged steel arm, and internal components (rack, pinion gear, needle bearing) for dimensional accuracy.
Assembly & Calibration: Integrate speed valves, back-check mechanisms, optional delay action/hold-open arms, and gear components, calibrating for Multi Size 1–6 power and smooth operation.
Quality Inspection: Each closer undergoes 2,000,000 cycle endurance testing, UL fire-rated performance simulation, and visual/functional checks for defects.
Certification Validation: Random samples are tested against UL standards to verify fire-rated performance and durability compliance.
Packaging: Pack in protective white/color boxes or custom cartons to prevent transit damage, with clear labeling for efficient logistics.
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