High Performance Heavy Duty Heavy Hammer Negative Pressure Exhaust Fan for Poultry House/Chicken Farm

High Performance Heavy Duty Heavy Hammer Negative Pressure Exhaust Fan for Poultry House/Chicken Farm. Customized Voltage Options: Available in 220V, 380V, and fully customized voltage/frequency (50-60Hz) for global use. Durable Blade Materials: Blades made from 430 Stainless Steel, Galvanized Sheet, or Aluminum Alloy for long life. Waterproof Bearing Design: Imported double-row bearings with special waterproof design prevent water entry. Energy Efficient Motors: Pure copper wire motors with high efficiency, energy-saving, and phase failure protection. Automatic Shutter System: Shutters open/close automatically to prevent dust entry and ensure 90-degree full opening. Corrosion Resistant Parts: Guide rods and rivets made of 304 Stainless Steel to prevent rust and wear. Durable Belt Drive Options: Modified B-type belts increase service life 3 times compared to Type A1 belts.