UL Listed Modern SS316 Fire Rated Mortise Door Hinge for Commercial Door-DDSS001-FR-4X3.5X3.0

Technical Specifications

Certification Standards: This product is dually UL/cUL certified, meeting UL 10C requirements and achieving a 3-hour fire rating. Certification file number R38013 can be verified on the UL website. This product also complies with ANSI/BHMA A156.1 Class 1, ensuring high performance in commercial environments.

Material: Made of 316 stainless steel with a molybdenum content of 2.1-2.5% and a nickel content of 10-14%, providing superior corrosion resistance. The material has passed a 5000-hour salt spray test, making it suitable for use in a variety of harsh environments.

Dimensional Accuracy: Standard 4" x 3.5" dimensions, 3.0mm thickness, with a tolerance of ±0.05mm. A 12mm latch depth and H8 hole tolerance ensure a precise fit during installation. The load-bearing capacity meets the highest ASTM standards.

Finish: Utilizing high-grade satin stainless steel with a surface roughness of Ra 0.4-0.6μm. The treatment process complies with AMS 2700 standards, ensuring a uniform surface while maintaining excellent fingerprint and stain resistance.

Product Features

Superior Corrosion Resistance: This Commercial Door Hinge is constructed of 316 stainless steel, which contains 50% more molybdenum than standard 304 stainless steel, resulting in over three times better corrosion resistance in chloride environments. This makes it particularly suitable for the frequent cleaning and disinfection and high humidity environments found in commercial buildings, extending its service life by at least five years.

Precision Bearing System: Utilizing a self-lubricating composite bearing design, the hinge achieves a coefficient of friction below 0.08 and reduces opening and closing torque by 40%. The bearings have been tested for one million opening and closing cycles without wear, ensuring the hinge maintains smooth and quiet operation despite frequent use in commercial environments.

Intelligent Safety Design: A built-in overheat protection mechanism automatically activates an additional locking function when the temperature exceeds 300°C. Each Commercial Door Hinge is equipped with a wear indicator window, allowing maintenance personnel to intuitively monitor its status and plan maintenance schedules in advance.

Optimized Installation: The modular design allows for quick replacement of all components. The mounting holes conform to DIN standards and are fully compatible with mainstream commercial door systems. The unique centering design reduces installation time by 30%, significantly reducing labor costs.

Application Scenarios

High-end Office Buildings: This Commercial Door Hinge is ideal for main entrances and fire partition doors in Class-A office buildings. Its elegant satin finish blends seamlessly with modern office environments while meeting stringent fire regulations. Its high strength withstands frequent use and maintains long-term stable performance.

Shopping Malls: Large commercial complexes require a reliable Commercial Door Hinge for their fire-rated door systems. Certified with a 3-hour fire rating, it effectively blocks the spread of fire in emergencies. Its corrosion resistance resists cleaning chemicals, ensuring long-lasting aesthetic appeal.

Healthcare Facilities: Hospitals and clinics require door systems that combine safety and durability. Its 316 stainless steel construction resists corrosion from disinfectants, while its silent design provides a quiet environment for patients. Its fire resistance meets the highest safety standards for healthcare buildings.

Hotels and Conference Centers: High-end hotels require door systems that balance aesthetics and functionality. The modern design of this Commercial Door Hinge enhances the overall décor while ensuring safety in emergencies. Its durability reduces maintenance and lowers operating costs.

Installation Guidelines

Pre-installation Preparation: Confirm that the thickness of the door leaf and door frame meets the installation requirements for commercial door hinges. Use a dedicated template to precisely mark the installation locations and ensure that all hinges are installed at the same height. Prepare specialized tools such as a torque screwdriver and a level.

Precise Slotting and Positioning: Use a CNC slotting machine to ensure the depth and dimensions of the latch slots are precisely aligned. Maintain a slot depth of 12 ± 0.1 mm, with the slot walls vertical. Clean all contact surfaces before installation to ensure they are free of oil and impurities.

Professional Installation Procedure: Install the door frame first and tighten using a torque screwdriver to a standard of 2.8 N·m. When installing the door leaf, ensure it is perfectly aligned with the frame. Use a feeler gauge to check the gap between the hinge and the door leaf to ensure uniformity.

Commissioning and Acceptance: After installation, perform a test opening and closing to check for smooth operation. Adjust the hinge pressure to ensure the door leaf's automatic closing function is functioning properly. Finally, perform a fire seal inspection to ensure that all gaps meet fire safety regulations.