Specification of Exhaust Fan :
1. Exhaust fan blade is special designed for efficiency which made of Krupp stainless steel by punch forming. Large air volume, no deformation, no broken, no dust, attractive and durable. Thickness 1.2mm, surface finish BA grade.
2. Centrifugal system open the shutters at complete 90 degree to ensure   air resistance and   air volume. When close, the sealing can efficiently block light and wind into the poultry farm house. As the first one adopt high quality nylon PA66 to ensure the long service life. The fasteners of centrifugal system all are copper rivets, wear-resisting and no rust, flexible. Guide rod is made of 304 stainless steel, ensure the high strength, no rust, reduce friction.
3. Frame adopts Hot Galvanized sheet with zinc thickness of 275g/m2, which extremely improve its anti-corrosion performance. Shutter fixed parts are made of high quality nylon which ensure long service life, open flexibly.Shutters are made of galvanized sheet with thickness of 0.8mm and 1.5mm, ensure shutters no deformation, running stable. There is also made of glass fiber reinforced plastics
4. Belts long service life, maintenance free.
5. Both China famous motor and Siemens motor are available. Motor voltage and frequency can be customized. Chinese famous motor OEM by special design for fan, the first put in the phase lack protection device which would power off when shortage of electricity. Motor protection grade IP55, insulation class F grade.
6. Fan belt pulley and flange are made of high strength aluminum-magnesium alloy by die-casting. Light weight, lower vibration. Blast-sanding treatment for attractive appearance, eliminate internal stress to improve its own rigidity and stability.
7. Motor plate fixed nuts, first change round type to hexagon type. And with stainless steel washer, more firmly, never loosen.
8. Fan side frame with plastic handle, easy to carry, convenient to load, reasonable design without injuring hands, beautiful appearance.
9. Linking parts are made of aluminum alloy,light weight,no deformation,added with wear-resistant shaft sleeve.Reducing friction to ensure the shutters open flexibly.The spring is made of 304 stainless steel,long service life,no deformation,no rust.
10. Fan bearing adopts imported double-row bearing with special waterproof design. High strength, low noise, free maintenance and long service life.
11. Fan blades are adjusted by intelligent dynamic-balance tester, the weight tolerance of each blade is controlled within 1g. Ensure the fan smooth running, lower vibration, less noise, increase stability. Blade material have stainless steel ,galvanized sheet, aluminum alloy for option.