Hydraulic Automatic Fireproof Door Closer

The Heavy Duty CE Standard Adjusting Sliding Door Closer is positioned as a durable and high-performance door control solution designed for demanding commercial and fire-rated sliding door applications. Manufactured from robust aluminium alloy, it offers excellent structural strength, stability, and resistance to daily wear. Certified to CE EN1154 with 500,000 cycle testing, it ensures long-term reliability under frequent operation, while its EN1634 fire rating of 120 minutes supports fire door compliance and controlled closure during emergency situations. With 96 hours corrosion resistance, it is suitable for environments requiring enhanced durability. Featuring adjustable closing speed and smooth sliding action, this door closer is ideal for heavy sliding wooden or metal doors in offices, hotels, hospitals, shopping centers, and other public buildings where safety certification, performance consistency, and long service life are essential.

Technical Specifications

Product Images and Videos

 

Product Features & Advantages

• Adjustable Closing & Latching Speed: The DDDC008 allows precise adjustment of both closing and latching speeds to suit different commercial environments. Whether installed in a quiet hotel lobby or a busy office entrance, the dual-speed regulation ensures smooth, controlled door movement that enhances safety, minimizes noise, and improves user comfort.
• European Style Heavy Duty Design: Designed with a modern European aesthetic, this heavy-duty sliding door closer delivers reliable performance in high-traffic commercial spaces such as shopping malls, supermarkets, and office buildings. Its compact sliding track design provides both durability and a clean architectural appearance.
• Dual Speed Valves & Back Check Valve: Equipped with two speed control valves concealed under a slide cover and a front-positioned back check valve, the DDDC008 ensures stable, controlled door operation. The back check function prevents doors from being forced open too quickly, reducing structural stress and protecting surrounding walls and hardware.
• Power Adjustable by Spring: With adjustable power sizes #2, #3, #4, and #5, the internal spring mechanism adapts to door weights ranging from 25–120kg. This flexibility makes it suitable for various commercial door types without changing the closer model.
• Single-Action Door Compatibility: Engineered for single-action doors up to 1250mm in width, the sliding arm configuration provides smooth operation in retail storefronts, warehouse access points, and commercial entry doors where space efficiency is essential.
• Seamless D&D Hardware Integration: The DDDC008 integrates smoothly with door locks, door handles, door stops, and panic hardware, forming a cohesive and reliable door hardware system for commercial projects.

Application Scenarios

The DDDC008 Heavy Duty Sliding Door Closer is designed for commercial environments that demand adjustable performance, controlled operation, and long-term durability. It is widely used in hotels, office buildings, retail malls, supermarkets, and warehouse facilities.

In hotel main entrances, the closer supports heavy entry doors while working seamlessly with door locks to ensure guest safety and controlled access. In mall retail storefronts and supermarkets, its adjustable power and dual-speed control provide consistent operation despite frequent customer traffic, reducing maintenance needs and improving overall shopping experience.

For office building lobbies, the European-style sliding design enhances modern architectural aesthetics while delivering quiet, smooth door control. In warehouse access doors, its adjustable spring power and back check protection ensure reliable performance even under intensive daily use.

Certifications and Compliance

• CE Certification: Complies with European safety, health, and environmental protection standards for building hardware, ensuring reliable performance in commercial applications.
• ISO 9001 Quality System: Manufactured in D&D’s ISO 9001-certified production facility, with strict quality management procedures covering material sourcing, assembly, inspection, and final testing.

Customization Options

D&D offers customization for the DDDC008 door closer to meet commercial project-specific needs:

• Power Size Tuning: The adjustable spring mechanism allows customization of power sizes (#2–#5) to meet specific door weight or usage requirements, including heavier warehouse or high-frequency commercial doors.

Production Process & Quality Control

1. Material Sourcing: High-grade materials are selected for the closer body, sliding arm, and internal valve systems to ensure structural integrity and long-term durability for 25–120kg commercial doors.
2. Precision Manufacturing: CNC machining technology ensures accurate dimensions of the closer body and sliding components, guaranteeing smooth sliding movement and consistent hydraulic control.
3. Assembly & Calibration: Spring mechanisms, dual speed valves, and back check components are assembled and calibrated carefully to meet CE requirements and ensure stable adjustable power performance.
4. Quality Inspection: Each door closer undergoes functional testing, including heavy-duty cycle testing and speed adjustment verification, along with thorough visual inspection to eliminate defects.
5. Certification Testing: Random production samples are tested in accordance with CE standards to confirm safety, operational stability, and durability compliance for commercial applications.
6. Packaging: Products are packed in protective white or color boxes, or customized cartons, to prevent damage during transportation, with clear labeling to support efficient project logistics.