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Ventech weatherproof louver manufacturer for office budilings

Ventech weatherproof louver manufacturer for office budilings

Back Draught Damper
Guangdong, China (Mainland)
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Back Draught Damper




Ventilation damper the type back draught damper is a non-return damper for extract air. Made of galvanized sheet, for installation into round ducts, to shut the duct automatically when extraction of air stops. Prevent the outside air flow back.




Nominal sizes: 100, 125, 150, 200, 250, 315.

For non-return air control.

Fame made of galvanized sheet 0.8mm, inner shutter made of aluminum 0.3mm.


For installation into round ducts.

Specially designed springs allow accurate control of the shutter.


 Ventech weatherproof louver manufacturer for office budilings-1

Ventech weatherproof louver manufacturer for office budilings-2

In the design process, various factors of Ventech weatherproof louver are considered. These factors include comfort, durability, smoothness, drapability, breathability, and hand feel. Its lifting range makes it adaptable to different handling heights
On-site tests will be carried out during the inspection of Ventech weatherproof louver. They include static loading, clearance, and real performance tests under the right testing equipment. This product has been certified under CE
Ventech weatherproof louver has passed many tests conducted by third-party testing labs. It has been tested in terms of fiber content, tensile & tear strength, shrinkage, and colorfastness. This product has a high level of IP
The design of Ventech weatherproof louver is finished using various designing technologies. They include optoelectric 2D and 3D foot scanners, and CAD technology. The fork width can be manually adjusted
Ventech weatherproof louver is meticulously designed. Various calculations are performed considering the desired speed and loads to decide its material and specific dimensions. Even with heavy cargo, it remains surprisingly quiet
The product has good color retention. Made of special materials and treated with surface finish, it is not prone to yellowing. Its special lowering valve enables the gentle lowering of the load
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