This standard applies to common window types such as casement windows (inward or outward opening), top-hung windows, and bottom-hung windows.
The lock cylinder is the core of anti-theft security and directly determines the lock's protection level. Among residential lock cylinders, C-grade lock cylinders currently offer the highest security and the longest resistance to technical unlocking, making them the preferred choice for families emphasizing theft prevention.
floor spring is a "door closer" hidden within the floor. It not only controls opening and closing but also allows adjustment of the closing speed and force. It holds the door steadily in place, preventing it from swinging uncontrollably in the wind.
Complies with the technical requirements of the national standard GB/T 37267-2018 "General Technical Conditions for Seismic Bracing and Hanging Systems in Buildings". The seismic bracing systems undergo comprehensive testing, including appearance, dimensions and tolerances, coating thickness, load-bearing performance of seismic connecting components, load-bearing performance of pipeline connecting components, cyclic loading performance, fatigue performance, fire resistance, and corrosion resistance.
<p>the sequential door closer ensures the doors close in the "right order," while the door closer ensures they "close properly." Understanding their differences is key to selecting the right components that meet safety standards while enhancing usability.for reliable door control hardware, consider 3H Hardware</p>
250kg floor spring
3H INC.

Explore our exceptional range of glass floor springs, designed to provide unparalleled support and reliability. These heavy-duty springs are engineered to effortlessly bear substantial weight, ensuring stability and durability for your glass doors.


Convenient and fast: Ground spring doors usually use sensors to sense changes in the surrounding environment, which can achieve automatic opening and closing, making them convenient and fast;
Beautiful and elegant: The connection between the door leaf and the door frame can reduce the use of crossbeams, making the door body more beautiful and elegant;
Safe and reliable: The floor spring door can automatically sense people and objects, ensuring that it will not cause harm to the surrounding environment and human body during the process;
Strong durability: The springs used in floor spring doors have a longer lifespan, can withstand large switching forces, and have high durability.
Key Functions
2.Experience the ultimate control over your door's closing speed with our innovative glass floor springs. These springs offer a smooth and controlled closing mechanism, guaranteeing a seamless and secure closure every time. Say goodbye to abrupt door slamming and embrace the tranquility of a controlled and gentle shutting motion.
3.Suitable for both single and double-directional door openings, making them versatile and adaptable to various architectural designs. With their robust construction and precise engineering, these springs effortlessly facilitate the smooth operation of your glass doors, enhancing convenience and functionality.


About 250KG Floor Spring
Our 250kg glass floor spring, a high-quality product designed to meet your specific needs. With a professional tone of voice, we aim to provide you with a detailed description of its features.
This glass floor spring is built to withstand heavy loads, making it an ideal choice for commercial and residential applications. Its robust construction ensures durability and long-lasting performance, giving you peace of mind.
One of the key features of our glass floor spring is its ability to control the closing speed smoothly. This ensures that your doors close in a controlled manner, preventing any sudden movements that may cause damage or accidents. With this feature, you can trust that your doors will operate seamlessly, enhancing the overall safety and convenience of your space.
Versatility is another advantage of our glass floor spring. It is designed to accommodate both single and double doors, providing you with flexibility in your door configurations. Whether you have a small entrance or a wide opening, our glass floor spring can adapt to your specific requirements.
Furthermore, this product boasts a comprehensive range of functionalities. From adjustable closing force to adjustable closing speed, it offers you complete control over the operation of your doors. You can customize the settings according to your preferences, ensuring optimal performance and user experience.
In conclusion, our 250kg glass floor spring is a reliable and feature-rich product that meets the highest standards of quality and functionality. Its ability to bear heavy loads, control closing speed smoothly, accommodate various door configurations, and offer customized settings make it an excellent choice for any space. Experience the difference in door operations with our professional-grade glass floor spring.

Explore our exceptional range of glass floor springs, designed to provide unparalleled support and reliability. These heavy-duty springs are engineered to effortlessly bear substantial weight, ensuring stability and durability for your glass doors.


Convenient and fast: Ground spring doors usually use sensors to sense changes in the surrounding environment, which can achieve automatic opening and closing, making them convenient and fast;
Beautiful and elegant: The connection between the door leaf and the door frame can reduce the use of crossbeams, making the door body more beautiful and elegant;
Safe and reliable: The floor spring door can automatically sense people and objects, ensuring that it will not cause harm to the surrounding environment and human body during the process;
Strong durability: The springs used in floor spring doors have a longer lifespan, can withstand large switching forces, and have high durability.
Key Functions
2.Experience the ultimate control over your door's closing speed with our innovative glass floor springs. These springs offer a smooth and controlled closing mechanism, guaranteeing a seamless and secure closure every time. Say goodbye to abrupt door slamming and embrace the tranquility of a controlled and gentle shutting motion.
3.Suitable for both single and double-directional door openings, making them versatile and adaptable to various architectural designs. With their robust construction and precise engineering, these springs effortlessly facilitate the smooth operation of your glass doors, enhancing convenience and functionality.


About 250KG Floor Spring
Our 250kg glass floor spring, a high-quality product designed to meet your specific needs. With a professional tone of voice, we aim to provide you with a detailed description of its features.
This glass floor spring is built to withstand heavy loads, making it an ideal choice for commercial and residential applications. Its robust construction ensures durability and long-lasting performance, giving you peace of mind.
One of the key features of our glass floor spring is its ability to control the closing speed smoothly. This ensures that your doors close in a controlled manner, preventing any sudden movements that may cause damage or accidents. With this feature, you can trust that your doors will operate seamlessly, enhancing the overall safety and convenience of your space.
Versatility is another advantage of our glass floor spring. It is designed to accommodate both single and double doors, providing you with flexibility in your door configurations. Whether you have a small entrance or a wide opening, our glass floor spring can adapt to your specific requirements.
Furthermore, this product boasts a comprehensive range of functionalities. From adjustable closing force to adjustable closing speed, it offers you complete control over the operation of your doors. You can customize the settings according to your preferences, ensuring optimal performance and user experience.
In conclusion, our 250kg glass floor spring is a reliable and feature-rich product that meets the highest standards of quality and functionality. Its ability to bear heavy loads, control closing speed smoothly, accommodate various door configurations, and offer customized settings make it an excellent choice for any space. Experience the difference in door operations with our professional-grade glass floor spring.
