Security Door Control Closer CE UL

UL Listed Door Closer - Model DDDC057

1. Product Overview

The DDDC057 UL Listed Door Closer by D&D HARDWARE is an economical, fire-rated door closer engineered for residential and commercial applications. Certified to UL Listed (10C, 3 Hours Fire-Rated, File No.: R40717), this closer delivers reliable, quiet door operation with adjustable closing & latching speed. Featuring a precision cast aluminum body and steel arm, it integrates seamlessly with D&D’s door hardware ecosystem (including door locks, door hinges, and door handles), making it ideal for enhancing safety and convenience in diverse buildings.

2. UL Listed Door Closer - Technical Specifications

• Model Number: DDDC057
• Brand: D&D HARDWARE
• Max. Door Width: 950mm
• Door Weight Capacity: 40–65kg
• Power Size: Adjusting Size 3
• Speed Control: Adjustable Closing & Latching Speed
• Construction: Precision cast aluminum body, steel arm
• Installation: Non-handed (suitable for left/right doors), adjustable back check (optional)
• Certifications: UL Listed (10C, 3 Hours Fire Rated, File No.: R40717)
• Finish Options: Gold, Brown, Antique Bronze, Light Bronze, Matt White, Silver, Dark Bronze, Matt Black, or custom

3. UL Listed Door Closer - Product Images and Videos

4. UL Listed Door Closer - Product Features & Advantages

• UL Listed & Fire-Rated: 3-hour fire protection certified by UL (File No.: R40717), ensuring safety and code compliance in residential and commercial buildings.
• Economical & Versatile: Designed for both residential and commercial doors, offering cost-effective performance without compromising quality.
• Adjustable Speed Control: Fine-tune closing and latching speeds for smooth, quiet door operation—ideal for noise-sensitive environments like hotels or offices.
• Durable Construction: Precision cast aluminum body and steel arm resist wear, corrosion, and heavy use, ensuring long-lasting reliability in high-traffic areas.
• Non-Handed Installation: Compatible with left and right-handed doors, simplifying installation and reducing inventory complexity for contractors.
• Optional Back Check: Adjustable back check (available as an option) controls door opening speed, preventing slamming and protecting door hardware and frames.
• Seamless D&D Hardware Integration: Works with door locks, door hinges, door stops, and door handles to create a unified door hardware system for comprehensive building functionality.

5. UL Listed Door Closer - Installation Steps

1. Prepare the Door & Frame: Ensure door width (≤950mm) and weight (40–65kg) match DDDC057 specifications. Gather installation tools (drill, screwdriver, measuring tape).
2. Mount the Closer Body: Attach the cast aluminum door closer body to the door or frame using provided hardware, aligning with door hinge and door lock components.
3. Install Steel Arm: Connect the steel arm to the door and closer body, adjusting linkage for proper door travel and alignment.
4. Adjust Speed Valves: Set closing and latching speeds via the adjustable valves, testing operation for smooth, quiet movement. If using optional back check, calibrate it to control door opening speed.
5. Verify Integration: Ensure compatibility with door locks, door hinges, and door stops—test door opening/closing cycles for seamless system performance.

6. UL Listed Door Closer - Application Scenarios

The DDDC057 Door Closer excels in environments requiring economical, fire-rated performance and quiet operation, including:

In hotels, its quiet latching ensures guest comfort while providing fire safety, integrating with door locks for access control. For apartments, the 40–65kg weight capacity handles standard entry doors, pairing with door hinges for durable daily use. In offices, adjustable speed control maintains a professional, noise-free environment, matching door handles for cohesive design.

7. UL Listed Door Closer - Value for Buyers

• Fire Safety Compliance: UL 3-hour fire rating meets building codes, ensuring occupant safety and reducing liability for property owners.
• Economical Performance: Delivers reliable door closing at a cost-effective price point, ideal for bulk installations in multi-unit buildings or commercial spaces.
• Systematic Procurement: Integrates with D&D’s door locks, door hinges, door stops, and accessories, enabling buyers to source a complete door hardware solution from one supplier—streamlining logistics and project management.
• Customization Flexibility: Optional back check and diverse finish options adapt to unique project requirements and design aesthetics.
• Easy Installation & Operation: Non-handed design and clear speed adjustment make setup accessible for contractors, while quiet operation enhances user experience in occupied spaces.

8. UL Listed Door Closer - Certifications and Compliance

The DDDC057 Door Closer meets rigorous international standards for safety, performance, and quality:

• UL Listed (10C, 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. UL Listed Door Closer - Customization Options

D&D offers OEM/ODM customization for the DDDC057 door closer to meet project-specific needs:

• Finish Customization: Select from standard finishes (Gold, Brown, Antique Bronze, etc.) or request custom colors to match door handle and architectural aesthetics.
• Back Check Customization: Add adjustable back check functionality to control door opening speed, preventing slamming in high-traffic areas.
• Branding: Incorporate custom logos or engravings on closer bodies for property developers or brand-specific building solutions.

10. UL Listed Door Closer - Production Process & Quality Control

1. Material Sourcing: Procure high-quality cast aluminum and steel components, tested for strength, corrosion resistance, and fire-rated performance.
2. Precision Manufacturing: Use cast aluminum processes and CNC machining to produce closer bodies, arms, and speed valves—ensuring dimensional accuracy for UL compliance.
3. Finishing & Coating: Apply selected finishes (powder coating, plating) with strict adhesion and uniformity testing to ensure aesthetic durability and corrosion resistance.
4. Assembly & Calibration: Integrate speed valves, springs, and mechanical components, calibrating speed control for smooth, consistent door operation.
5. Quality Inspection: Each closer undergoes functional testing (speed control, closing force, fire-rated performance) and visual inspection for defects—critical for UL certification.
6. Certification Testing: Random samples are tested against UL 10C standards to verify fire-rated performance and safety in emergency scenarios.
7. Packaging: Pack in protective white/color boxes or custom cartons to prevent damage during shipping, with clear labeling for easy identification in logistics.