Hydraulic Automatic Fireproof Door Closer

Adjusting Automatic Door Closer - Model DDDC010

1. Product Overview

The DDDC010 Adjusting Automatic Door Closer by D&D HARDWARE is a UL Listed (3 Hours Fire-Rated, File No.: R40717) door closer engineered with European-style design for medium-duty commercial applications. Ideal for integrating with door hardware systems (including door locks, door hinges, and door accessories), this closer delivers smooth, controlled door closing with adjustable speed functionality. Suitable for doors up to 950mm wide and 45–65kg in weight, it combines modern aesthetics with reliable performance for hotels, offices, and residential buildings.

2. Adjusting Automatic Door Closer - Technical Specifications

• Model Number: DDDC010
• Brand: D&D HARDWARE
• Door Width Compatibility: Up to 950mm
• Door Weight Capacity: 45–65kg
• Power Size: Fixed Size 3
• Speed Control: Adjustable Closing & Latching Speed (via two front-mounted speed valves under slide cover)
• Construction: Die-casting body, Steel Scissors Arm (Slide Track Arm 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. Adjusting Automatic Door Closer - Product Images and Videos

4. Adjusting Automatic 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 commercial and residential buildings.
• Adjustable Speed Control: Two front-mounted speed valves (hidden under slide cover) enable precise adjustment of closing and latching speeds for smooth, controlled door operation.
• European-Style Medium-Duty Design: Engineered for commercial use with a sleek aesthetic, compatible with modern and contemporary door handles and door accessories.
• Durable Construction: Die-casting body and steel scissors arm (slide track arm optional) resist wear and corrosion, ensuring long-lasting performance in high-traffic environments.
• Seamless D&D Hardware Integration: Works with door locks, door hinges, door stops, and door accessories to create a unified door hardware system for comprehensive building functionality.

5. Adjusting Automatic Door Closer - Installation Steps

1. Prepare the Door & Frame: Ensure door width (≤950mm) and weight (45–65kg) match DDDC010 specifications. Gather installation tools (drill, screwdriver, measuring tape).
2. Mount the Closer Body: Attach the die-cast door closer body to the door or frame using provided hardware, aligning with door hinge and door lock components.
3. Install Scissors Arm (or Slide Track Arm): Connect the steel scissors arm (or optional slide track arm) to the door and closer body, adjusting linkage for proper door travel.
4. Adjust Speed Valves: Access the front-mounted speed valves (under slide cover) to set closing and latching speeds, testing operation for smooth, controlled movement.
5. Verify Integration: Ensure compatibility with door locks, door hinges, and door stops for seamless system performance in opening/closing cycles.

6. Adjusting Automatic Door Closer - Application Scenarios

The DDDC010 Door Closer excels in environments requiring medium-duty performance, European-style aesthetics, and fire safety, including:

In hotels, its European design complements luxury interiors while providing fire-rated safety, integrating with door locks for guest room access control. For office buildings, adjustable speed control ensures quiet, efficient door closing in busy corridors, matching door handles for a professional look. In apartments, the 45–65kg weight capacity handles main entrance doors, pairing with door hinges for durable daily operation.

7. Adjusting Automatic Door Closer - Value for Buyers

• Fire Safety Compliance: UL 3-hour fire rating meets building codes, reducing liability and ensuring occupant safety in emergencies.
• Medium-Duty Durability: Engineered for 45–65kg doors and commercial use, resisting wear and corrosion—lowering maintenance costs over time.
• 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 slide track arm, diverse finish options, and adjustable speed control adapt to unique project requirements and design aesthetics.
• Easy Installation & Adjustment: Clear instructions and accessible speed valves make setup and calibration straightforward for contractors, ensuring optimal door performance post-installation.

8. Adjusting Automatic Door Closer - Certifications and Compliance

The DDDC010 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. Adjusting Automatic Door Closer - Customization Options

D&D offers OEM/ODM customization for the DDDC010 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.
• Arm Customization: Opt for the optional slide track arm instead of the standard steel scissors arm to align with unique door operation requirements.
• Branding: Incorporate custom logos or engravings on closer bodies for property developers or brand-specific building solutions.

10. Adjusting Automatic Door Closer - Production Process & Quality Control

1. Material Sourcing: Procure high-quality die-cast metals and steel components, tested for strength, corrosion resistance, and fire-rated performance.
2. Precision Manufacturing: Use die-casting 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) 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.