The Heavy Duty UL Fireproof Aluminum Hydraulic Door Closer is positioned as a high-strength door control solution engineered for demanding commercial and fire-rated applications. Manufactured from durable aluminium alloy, it delivers excellent structural stability, wear resistance, and long-term performance in high-traffic environments. Its precision hydraulic mechanism ensures smooth, controlled closing with consistent latching force, effectively preventing slamming while maintaining reliable door alignment. Certified UL Listed for 3-hour fire-rated doors (File No.: R40717), it is designed to support fire door assemblies by ensuring automatic closure during emergency conditions and helping maintain compartmentalization. Ideal for heavy wooden or hollow metal doors in offices, hospitals, schools, hotels, shopping centers, and other public facilities, this door closer combines fire safety compliance with robust, dependable operation.
Technical Specifications
| Max. Door Width |
1500 mm |
| Door Weight Capacity |
20–150 kg |
| Power Size |
Size 1–6 by position |
| Certifications |
ANSI 156.4, UL Listed (3 Hours Fire-Rated, File No.: R40717) |
| Construction |
Precision Cast Aluminum Body & Forged Steel Arm |
| Mechanism |
Hydraulic operation with adjustable closing & latching speed |
Product Images and Videos
Product Features & Advantages
- American Style Heavy-Duty Design: Designed specifically for high-traffic commercial environments such as hotels, shopping malls, airports, and warehouses, the DDDC059DA supports a wide door weight range of 20–150kg. Its robust structure ensures stable performance under frequent daily use, making it ideal for demanding entrances where durability and reliability are essential.
- Precision Cast Aluminum & Forged Steel: The closer body is manufactured from high-grade cast aluminum, while the arm is made of forged steel for enhanced strength and wear resistance. This material combination delivers excellent corrosion resistance, structural stability, and long-term durability, even in challenging commercial environments.
- Adjustable Closing & Latching Speed: Equipped with two independent regulating valves, the closer allows precise adjustment of closing speed and latching speed. This ensures controlled, smooth door movement tailored to specific door weights and installation environments, such as quiet hotel corridors or busy retail storefronts.
- Non-Handed Installation: The non-handed design enables installation on both left- and right-handed doors without modification. This simplifies on-site setup, reduces installation time, and lowers labor costs across various commercial construction projects.
- Optional Hold Open & Back Check: The closer can be configured with a hold open arm for convenient access in high-traffic areas or a back check function to prevent doors from opening too forcefully. These optional features provide flexible customization to meet safety and accessibility requirements in different environments.
- ANSI & UL Fire-Rated Compliance: Certified to ANSI 156.4 Grade 1 with 2 million life cycles and UL listed for 3-hour fire rating (File No.: R40717), this door closer ensures superior durability and fire safety performance. It effectively supports fire door assemblies by helping prevent the spread of smoke and flames during emergencies.
- Hydraulic Mechanism for Smooth Operation: The advanced hydraulic control system ensures quiet, consistent, and controlled door closing. This minimizes impact stress on door hinges and locks, reducing wear and extending the lifespan of the entire door hardware system.
Application Scenarios
The DDDC059DA Heavy Duty Fireproof Door Closer is engineered for environments that require certified fire safety, heavy-duty endurance, and operational flexibility. It is widely applied in hotels, shopping malls, hospitals, warehouses, and transportation hubs where door reliability directly impacts safety and user experience.
In hotel ballroom entrances, the closer supports large, heavy decorative doors while ensuring quiet, controlled closing that enhances guest comfort and security. For mall anchor storefronts, its UL fire-rated compliance ensures adherence to building codes, while the heavy-duty mechanism withstands continuous foot traffic throughout the day.
In hospital main corridors, the adjustable closing speed allows smooth and safe door operation, reducing noise and supporting hygiene standards. For warehouse loading docks and airport retail zones, its strong power size range and durable hydraulic system manage oversized or high-frequency doors effectively, ensuring consistent performance under intensive commercial use.
Certifications and Compliance
- ANSI 156.4 Grade 1: Complies with American National Standards Institute requirements for heavy-duty commercial door closers, successfully passing 2 million operational cycles to guarantee long-term durability.
- UL Listed (3 Hours Fire-Rated): UL File No.: R40717 certifies that the closer provides up to 3 hours of fire protection, helping prevent the spread of smoke and flames in emergency situations.
- ISO 9001 Quality System: Manufactured in D&D’s ISO 9001-certified facility, with strict quality control procedures covering raw material sourcing, production, assembly, and final inspection to ensure consistent product performance.
Customization Options
D&D offers customization for the DDDC059DA door closer to meet commercial project-specific needs:
- Power Size Tuning: Power size can be customized within the 1–6 range to accommodate special door weights or high-frequency applications, such as extra-heavy warehouse or industrial doors.
- Appearance Customization: Custom finishes for the cast aluminum body and steel arm are available to match architectural themes or coordinate with door handles and surrounding hardware, including brushed metal or powder-coated finishes.
- Functional Add-Ons: Optional features such as hold open arm, back check, and delay action can be integrated to meet accessibility standards or adapt to high-traffic environments requiring controlled door movement.
Production Process & Quality Control
- Material Sourcing: High-grade cast aluminum and forged steel are carefully selected to ensure structural strength and durability suitable for 20–150kg heavy-duty doors.
- Precision Manufacturing: CNC machining ensures dimensional accuracy of the closer body and arm, guaranteeing smooth hydraulic function and consistent product performance.
- Assembly & Calibration: The hydraulic mechanism, adjustable valves, and optional components are assembled and calibrated to meet ANSI and UL performance standards, ensuring reliable closing force and fire-rated compliance.
- Quality Inspection: Each door closer undergoes functional testing, including heavy-duty cycle simulation, speed adjustment verification, and fire-rated performance checks, along with detailed visual inspection.
- Certification Testing: Random production samples are tested according to ANSI and UL standards to validate endurance, fire resistance, and operational safety.
- Packaging: Products are securely packed in protective white or color boxes, or customized cartons, to prevent transit damage. Clear labeling supports efficient logistics and accurate delivery for commercial projects.
Installation Steps
- Prepare Door & Frame: Verify that the door width (≤1500mm) and weight (20–150kg) meet the DDDC059DA specifications. Prepare necessary tools such as a drill, torque wrench, and measuring tape to ensure accurate installation.
- Select Power Size & Installation Type: Choose the appropriate power size (1–6) according to the door weight and application. Determine the installation method—standard arm, top-jamb, or parallel arm—based on project requirements and door configuration.
- Mount Cast Aluminum Body: Securely install the cast aluminum closer body onto the door or frame following the template guidelines. Ensure accurate alignment with door hinges and locks for optimal performance and longevity.
- Install Forged Steel Arm: Attach the forged steel arm to the closer body and connect it to the door. Adjust the arm positioning to achieve proper door travel and smooth movement.
- Adjust Speed, Power, & Optional Features: Calibrate the closing speed and latching speed using the adjustment valves. Fine-tune the power size if required, and activate optional features such as hold open or back check according to site conditions.
- Verify Operation & Integration: Test the door multiple times to confirm smooth closing, secure latching, and proper functionality of optional features. Ensure compatibility with panic exit devices, door stops, and other installed hardware components.
