As an automatic door closing device, the best-selling door closers have different focuses on functions and scene adaptation . The following is an analysis from the core dimensions:

1. Core Features of the Product

This door closer, produced by the QIANG LANG brand, is constructed from an aluminum alloy body, combining lightweight yet high strength to accommodate varying door weights. Its silver metallic finish creates a simple, modern design that complements any architectural style. Its structural design includes an adjustment knob for precise control of closing speed and force, as well as a removable door leaf fixing assembly to accommodate varying door leaf thicknesses and installation scenarios, making it exceptionally easy to install.

2. Functions and Applicable Scenarios

1. Core Function : Automatically close the door leaf to ensure the barrier effect of the fire door in the event of a fire. At the same time, the speed/force adjustment is used to achieve smooth door closing and reduce the potential impact risk to personnel.

2. ‌Scope of application‌ : Widely matches wooden fire doors, steel fire doors and other door bodies, covering civil scenarios such as hotels, guesthouses, and homes, as well as commercial scenarios such as shopping malls and office buildings, to meet the fire protection and safety needs of different buildings.

3. Analysis of hot-selling logic

This product is a hot seller in Asia and the Middle East due to the following core advantages:

1. Technical adaptability : The door closer's adjustable design (adjustable speed and force) and installation flexibility (adaptable to different door leaf structures) precisely match the diverse installation requirements of fire doors in Asian and Middle Eastern buildings, meeting usage habits in different scenarios.

2. Market adaptability : The brand has deep roots in overseas supply chains, and its products have strong channel penetration and after-sales response speed in Asia and the Middle East, helping it quickly establish a reputation in the regional market and become a best-seller.