Hydraulic Door Hinge

a.Innovative 3D Hidden Design**: Features a concealed structure that integrates seamlessly with doors, offering both functional excellence and aesthetic minimalism.
b.Dual Power Spring System**: Utilizes high-load energy-storage springs to deliver stronger door-closing force, ensuring efficient and reliable opening and closing cycles.
c.Dual Buffering System with Exclusive Technology**: Adopts revolutionary integrated European-standard dampers, providing superior shock absorption and smooth operation.
d.Oil-free Power Chamber**: Eliminates the need for hydraulic oil injection, achieving a breakthrough in hydraulic hinges with **zero oil leakage**, ensuring long-term performance stability.
e.Exceptional Low-temperature Resistance**: Engineered with advanced materials and unique processes, it operates smoothly even at -25°C, unfazed by frost, ice, and snow challenges.
f.Adjustable Door-closing Force & Damper**: Door-closing force is customizable to suit different door types, from lightweight entrance doors to heavy fire-resistant doors. The damper offers two modes—silent closing and stable locking—switchable with one click for personalized use.
g.Optimized Functional Angle Design**: Boasts a unique angle structure with a free door-holding zone (180°-110°), a soft-closing zone (110°-20°), and a damping locking zone (20°-0°), ensuring a smooth, comfortable, and controlled door operation experience.

### Product Highlights of 4-inch Split-type Damping Hinge
- **Innovative Structure**: Pioneering split - structure linkage ensures smooth and reliable operation.
- **Ultra - Small Shaft Diameter**: Boasts an industry - leading 18.5mm shaft diameter, representing high technical content.
- **Temperature Resistance**: Maintains consistent closing speed even in extreme temperatures ranging from - 30°C to 60°C.
- **Advanced Transmission**: Features innovative bead - type transmission for enhanced durability and stability.
- **Replaceable Components**: Springs and dampers are replaceable, allowing for easy maintenance and extended product life.
- **Integrated Buffering**: Built - in damping buffer provides silent locking, automatic door closing, and effective positioning.
- **User - Friendly Installation**: No need for adjustment during installation, and the process can be completed in just 3 simple steps.
- **Versatile Application**: Suitable for various door types including fire doors, wooden doors, entrance doors, and aluminum alloy doors.
- **Long Service Life**: Capable of withstanding up to 150,000 open - and - close cycles, ensuring long - term reliability.
- **Eco - Friendly & Durable Material**: Constructed from space aluminum, it is durable, eco - friendly, and offers a load - bearing capacity of ≥25Kg per slice.