BTS-7541
Constructed to withstand intense traffic and environmental stress, the BTS-7541 floor spring features corrosion-resistant finishes and reinforced mechanisms that maintain performance across extended service life. Built in compliance with international performance standards, the unit ensures dependable operation in commercial, institutional, retail, and high-occupancy environments where reliability and safety are paramount. With versatile adjustability, robust engineering, and a design focused on strength and precision, this floor spring offers professional-grade motion control that enhances both user experience and architectural integrity.
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1000KG Floor Door Hinge
Model：BTS-7541
Max Door Weight：1000kg
EN7 force efficient closing door opening force small closing force large
The super heavy-duty electric floor spring is engineered for oversized and high-load door applications requiring exceptional structural strength and intelligent motion control. Designed to support doors weighing up to 1000 kg with widths up to 3000 mm, this system accommodates unlimited door height, making it suitable for monumental architectural entrances and large-scale commercial installations. It is compatible with heavy-duty framed doors, large metal doors, and reinforced glass assemblies, delivering stable bi-directional swing performance with precision-controlled opening and closing movement.
Equipped with a multifunctional control system featuring an integrated LED display, the unit enables convenient parameter configuration and real-time operational monitoring. The ultra-long-range remote control operates up to 200 meters (unobstructed) and supports APP-based control for enhanced flexibility and smart integration. Designed for concealed floor installation, the system maintains a clean architectural appearance while ensuring low-noise operation, corrosion resistance, and long-term durability in demanding environments.
Technical Specifications
| Type | Heavy Duty Door Rotary Floor Springs |
| Model | BTS-7541 |
| Engine Cylinder | Single |
| Hold Open Function | Yes |
| Max Door Weight | 1000 kg |
| Max Door Width | 1800 mm |
| Power Size | EN7 |
| Size | 405 × 145 × 88 mm |
| Certified | Yes |
| CE Rated | Yes |
| Speed Control | Two Section Speed Control |
| Latching Speed Adjustment | 0–20° |
| Closing Speed Adjustment | 20–90° |
| Material | Stainless Steel + Cast Iron |
BTS-750
Constructed with high-quality materials and precision-machined internal mechanisms, this floor spring is built for durability and long-term performance in demanding settings such as offices, retail entrances, galleries, and institutional spaces. The power-adjustable feature enables installers to tailor the closing force to specific door sizes and site requirements, improving door operation and occupant safety. Designed for compatibility with a wide range of door types—including glass, aluminum, wood, and steel—this floor spring combines robust engineering with seamless architectural integration, offering dependable control and structural stability across everyday use.
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150KG Floor Door Hinge
Model：BTS-750
Max Door Weight：60-150kg
Max Door Width : 600-1100mm
The BTS-750 Floor Spring is a certified, high-performance door control solution engineered for demanding commercial environments. Designed for installation in commercial complexes, office buildings, hospitals, retail spaces, and other public facilities, it delivers stable and precise door movement across a wide range of door weights. Whether applied to lightweight interior doors or heavier entrance systems, the BTS-750 ensures controlled swing, secure latching, and long-term operational reliability—enhancing both safety and user convenience.
Certified to ANSI/BHMA A156.4 Grade 1, the BTS-750 meets one of the highest durability standards in the door hardware industry, confirming its suitability for high-frequency usage conditions. The unit features multi-point adjustability for closing speed and spring force, allowing accurate calibration to match specific door sizes and site requirements. Tested to withstand over 2,000,000 opening and closing cycles, the BTS-750 demonstrates exceptional endurance and mechanical stability, ensuring consistent hydraulic performance over extended service life. For projects requiring certified durability, precision control, and long-term dependability, the BTS-750 represents a reliable and professional-grade solution.
Technical Specifications
| Applicable Standard | EN1154 & ANSI/BHMA 156.4 Grade 1 & UL |
| Applicable Door Width | 600–1100 mm |
| Applicable Door Weight | 60–150 kg |
| Closing Force | EN2–4 |
| Hold-Open | 90° Hold Open, and Any Point Hold Open from -105° to 105° |
| Maximum Open Degree | 360° |
| Latching Speed Adjustment | 0–20° |
| Closing Speed Adjustment | 20–90° |
| Application Temperature | -40℃ – 60℃ |
| Dimension | 285 × 82 × 48.5 mm |
| Engine Cylinder | Single |
| Material | Stainless Steel + Iron |
| Service Life | 2,000,000 Cycles |
BTS-3000
The Heavy Machine 300 kg High-Quality Floor Spring from Elwink is engineered for robust performance in medium-to-high traffic environments where enhanced load-bearing capacity and precise motion control are essential. Designed to support doors up to 300 kg, this single-cylinder floor spring combines rugged structural components with precision hydraulic regulation to deliver smooth, balanced swing motion and reliable closing action. Its robust internal mechanism ensures consistent performance with minimal maintenance, providing controlled door movement and secure final closure whether installed in commercial entrances, institutional spaces, hospitality environments, or heavy-use interior applications. The concealed installation preserves architectural integrity while delivering dependable operational stability.
Manufactured with high-strength materials and precision machined elements, the unit is built for durability and long-term performance under frequent use. Adjustable hydraulic valves allow fine-tuning of closing, latching, and backcheck speeds to suit specific door sizes, weights, and site conditions, ensuring optimized performance across a variety of installation scenarios. Compatible with glass, aluminum, wood, and steel doors, this floor spring offers versatile application while maintaining smooth operation and structural reliability. With its combination of heavy-duty capacity, adjustable control, and engineered resilience, the Elwink 300 kg floor spring is a professional-grade solution for demanding architectural projects.
300KG Floor Door Hinge
Model：BTS-3000
Max Door Weight：300kg
Max Door Width : 1400mm
The BTS-3000 Stainless Steel Single-Cylinder Floor Spring is engineered for maximum installation flexibility and high-cycle commercial performance. Its compact body design allows integration in locations where conventional floor closers cannot be accommodated, making it ideal for thin slab concrete substructures and constrained floor depths. Designed to adapt to diverse architectural conditions, the BTS-3000 is compatible with a wide range of interchangeable door spindles, enabling seamless installation across various floor finishes, thresholds, and pivot configurations. This adaptability ensures consistent alignment, smooth bi-directional swing, and precise hydraulic control across different project requirements.
Tested to exceed 2,000,000 operating cycles by Intertek, the BTS-3000 is certified to ANSI/BHMA A156.4 Grade 1, confirming its suitability for high-traffic and demanding commercial applications. Engineered in accordance with the proven German BTS 3000 design platform, the system supports door weights up to 300 kg while delivering stable closing performance and long-term durability. Suitable for glass, wooden, aluminum, and framed door systems, the BTS-3000 also offers an optional German-type spindle configuration for enhanced structural compatibility and performance optimization in specialized installations.
Technical Specifications
| Model | BTS-3000 |
| Applicable Standard | EN1154 & ANSI156.4 & UL |
| Engine Cylinder | Single |
| Max Door Width | 1400 mm |
| Max Door Weight | 300 kg |
| Max Open Degree | 180° |
| Stop Device | 90° & 130° |
| Latching Speed Adjustment | 0–20° |
| Closing Speed Adjustment | 20°–90° |
| Application Temperature | -40° – 60° |
| Dimension (L × W × H) | 341 × 78 × 60 mm |