1) frame use the galvanized sheet, strong corrosion resistance.
2) High strength aluminum-magnesium alloy cast wheel; new twisted stamping-type fan.
3) Reasonable blade angle to ensure that a large number of air flow.
4) Strict quality control procedures for: noise test, vibration test of rotating concentric can detect, fan speed detection, air flow detection, machine efficiency of detection.
poultry exhaust fan