Accepted in the market and society, Shenzhen Hongfa Automatic Door Co, Ltd. has many years of experience in producing leading quality industrial roller doors. According to the material, Hongfa Automatic Door Company's products are divided into several categories, and spiral door is one of them. Essential tests for Hongfa self repairing high speed doors have been carried out by third-party testing labs. They are tear strength testing, tensile properties checking, flex & fatigue resistance testing, perforation resistance testing, and cut resistance testing. The product is widely used in supermarket warehousing. The product has good mechanical properties. It has both good relative hardness (Mohs scale) and absolute hardness, which makes it resistant to the exterior impact. With the simple structure design, its soft curtain is beneficial to stable operation.
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