1. Product Positioning and Core Functions

QL-106 is a concealed window closer designed specifically for fire-resistant windows. It uses hydraulic buffering to achieve automatic closing, combining safety protection with efficient closing performance. It is the preferred device for automatic closing of doors and windows in fire-resistant scenarios.

2. Key Parameters and Applicable Scenarios

• ‌Dimensions and load-bearing‌ : Installation dimensions are $132\text{mm}\times 19\text{mm}$ , suitable for door width $1200\text{mm}$ , door weight $45-65\text{kg}$ fireproof windows, precisely matching the size and load-bearing requirements of fireproof doors and windows.

• Door closing performance : supports 2-stage door closing speed adjustment , locking strength up to $45-65\text{kg}$ , which not only ensures the closing efficiency, but also reduces the closing impact through hydraulic buffering, taking into account both safety and silence.

• Applicable scenarios : Focusing on the field of fireproof windows , it meets the core needs of fire prevention scenarios for automatic closing of doors and windows and safety protection, and provides hardware guarantees for fire safety.

3. Installation and Application Logic

1. Installation method : As a concealed window closer, it must be installed in accordance with the "hidden installation" logic - a space must be reserved between the door and the door frame. $10\text{mm}$ , or increase the gap by "removing the upper material of the door" to ensure that the door thickness exceeds $42\text{mm}$ ; Installation requires professional operation, which is completed through steps such as marking hole positions, drilling, fixing the main body, and connecting the movable arm. The closing effect needs to be tested after installation to ensure performance.

2. Extended application scenarios : In addition to fireproof windows, window closers (door closers) can also be widely used in commercial places (such as offices and shopping malls), public facilities (such as hospitals and schools), industrial fields (such as factories and warehouses), and home environments . By automatically closing the door, they can achieve safety protection, ventilation control, and reduce manpower burden.

4. Product Value

QL-106 achieves an aesthetically pleasing appearance with its concealed design, ensures door closing safety and efficiency with its hydraulic buffering and speed adjustment, and precisely matches scene requirements with its fire window adaptation. It is a professional solution in the field of automatic closing of fire-resistant doors and windows, providing reliable support for the safety and functional requirements of doors and windows in various scenarios.