If the door lock is made of zinc alloy material, its hardness and anti-rust ability are poor, that is, thick plating is also easy to fade, blacken, and rot and blistering, but its advantage is that it is easy to make complicated pattern parts, especially pressure casting. The more complex pattern locks seen on the market are likely to be made of zinc alloys, and consumers should carefully identify them. Iron and steel, better strength, lower cost, but easy to rust, generally used as internal structural materials for locks, not suitable for external trim. Aluminum or aluminum alloys, common aluminum alloys (except for aerospace) are soft and lightweight, and have a lower material strength, but are easier to shape and shape. Copper is one of the most widely used lock materials. Its mechanical properties are good, corrosion resistance and processing performance are good, and bright color, especially copper forged handles and other lock decorative parts, the surface is flat, high density, no pores, Blisters. Both solid and rust-proof, can be used to plate gold or gold and other surface treatment, it looks magnificent, noble and generous, adding a lot of color to people's homes. From a durable point of view, the best material should be stainless steel, especially as a surface material, the more bright and bright. Its strength, corrosion resistance, color unchanged. However, there are many types of stainless steel, which can be mainly divided into ferrite and austenite. Ferritic stainless steel is magnetic, commonly known as stainless steel, long time, the environment will not be rusty, at present, only 304 stainless steel is the best stainless steel material.
Industrial sectional doors are the most durable and longest lasting doors to ensure circulation at the areas of the factory entrance and exit of goods, loading and unloading areas.
The body of sectional door is forming by 40 mm sandwich panels. These panels provides sound and heat insulation due to the intense doped polyurethane insulation was injected between galvanized steel sheet. (50 kg/m3).
Industrial sectional door systems provide space-saving with opening parallel to the ceiling.Any opening can be used clearly . and produces in accordance with the transition range and the height in the factory buildings or warehouses.
Doors is working sliding by be the most appropriate the gap between the top level of the gate with a ceiling height within the side rasils. The door can be mounted in different ways according to the gap distance (standard, low, highlift and vertical track systems).
Industrial sectional doors can easily be opened automaticly by 230-380 V-AC/50 Hz electric motor or manualy thanks to torsion spring system that balances the weight of the door.The galvanized springs are made to be durable of 25.000 door cycles.Motor with emergency chain All the drive systems have a mechanical back-up system fitted to the reduction gearbox of the electric motor, so that the sectional door can be opened if the power fails. The reduction gearbox can then be powered using the chain.
Industrial Sectional Door,Industrial Overhead Sectional Door,Industrial Warehouse Sectional Door,Industrial Garage Interior Sectional Door Shenzhen Hongfa Automatic Door Co., Ltd. , https://www.selfrepairinghighspeeddoor.com