The oxide film is thin. The national standard stipulates that the thickness of the oxide film of the building aluminum profile should be not less than 10um (micron). The thickness is not enough, and the surface of the aluminum profile is rust and corrosion. Some aluminum profiles without a name, site, production license and certificate have a thickness of only 2 to 4 um, and some even have no oxide film. According to experts' estimates, for every 1 um reduction in oxide film thickness, the cost per ton of profile can be reduced by more than 150 yuan.
The chemical composition is unqualified. The aluminum profile with a large amount of miscellaneous aluminum and scrap aluminum can greatly reduce the cost, but it will lead to the unqualified chemical composition of the aluminum profile of the building, which seriously jeopardizes the safety of the construction project.
Reduce the wall thickness of the profile. 90 series sliding window type, according to national standards, the wall thickness of aluminum profiles is not less than 1.4mm, and some Guangdong products are only 0.6 to 0.7mm. 46 series of ground door type, the minimum thickness of the aluminum profile used by the national standard is not less than 1.62mm. In the sampling inspection, some products in Guangdong are only 0.97 to 1.18mm.
Inferior aluminum profiles greatly reduce the sealing time, reduce the loss of chemical reagents, and reduce the cost, but the corrosion resistance of the profiles is also greatly reduced.
1.with 3000 square meter factory about 35 workshop workers and 25 office workers.
2.More than 20 sets of advanced machines with more than ten years domestic trade experience and international trade experience.
3.Manufacture and supply good quality automatic doors
4.With ISO 9001 Certification and many others certifications
5. Excellent DC brushless motor , high wear-resistant qualities wheels and reasonable structure design makes it more stable, quiet, longer life
6.Our Service system is perfect
Controller Dimensions : 85×124×600mm
Weight :12 kg
Maximun leaf weight :150 kg
Open range : 70°~115°
Closing speed : 10~43 cm/s
Door hold time :0.5~10 seconds
Main Power :AC 220V~250V,50~60 Hz
Maximum current :1A
Maximun motor power:55W
Wait Power :14W
Fuse :Minimum 3.5 ASlow
Operating Temperature : -30℃ ~+50℃
Swing Door,Exterior Swing Door,Aluminium Out Swing Door,Refrigerated Swing Door
Shenzhen Hongfa Automatic Door Co., Ltd. , https://www.highspeedshutterdoor.com