75 Series Folding Door

LX75 folding door system

LX75 folding door system can realize the opening of a total of20 leafs with each single leaf’s door height being 3.2 meters. It is the best solution for ultra-large cave opening. The width of the folding doors is the same. The simple appearance brings the building extremely concise and beautiful visual effects. It is suitable for the projects where basic thermal insulation requirements are to be met.

Technical parameters

Frame depth/mm :75
Sash’s clamping glass thickness range/mm : 20-36 



Thermal insulation : The K value for thermal insulation can reach 2.5 W/㎡.k
Sound proof : The attenuation value of sound after passing doors can reach 32 dB  (depending on the glass configuration)
Air tightness:The value can reach500 Pa
Water tightness : The value can reach400 Pa
Wind load resistance : The value can reach4000 Pa


Realizing 90% cave opening area and larger opening demand;
Separately sealing each door leaf,
Longxiang proprietary hardware mechanism for folding doors, making the opening and closing smoother and more stable, thus effectively reducing the noise when opening and closing ;
Replaceable high-quality stainless steel rails, higher strength, longer life, smaller motion resistance;
Embedded adjustable frame design and bottom bearing design;

Fax: +86-532-68971357
E-mail: john@longxiang-alu.com,info@longxiang-alu.com
Mob: +8613730908788(Mr John)
Add:Room 302,Building 2#,Beijianglu District, Huangdao District,Qingdao city,China