36 42 48 50 54 Inch Fan Ventilation for Chicken Pultry/Livestock Exhaust 380V Greenhouse Galvanized Box

36 42 48 50 54 Inch Fan Ventilation for Chicken Pultry/Livestock Exhaust 380V Greenhouse Galvanized Box. Dual Shutter Mechanism Options: Choose between Push-pull centrifugal type or Swung/heavy hammer nylon drop hammer for flexible opening. High Efficiency Stainless Steel Blades: 6 blades made of 430# stainless steel with special design for large air volume and durability. Superior Anti-Corrosion Protection: Galvanized box with 275g zinc thickness and 1.2mm shutter thickness for extreme anti-corrosion. Low Noise and Long Service Life: Features imported double-row waterproof bearings and special twist link belts for quiet, maintenance-free operation. Flexible Motor Selection: Available with high-quality Chinese motors or Siemens motors with customizable voltage and frequency. Comprehensive Safety Certifications: Certified by ISO, CE, CCC, SGS, ETL, and Bess Lab in the USA for quality assurance. Robust Motor Protection: IP55 protection grade, F class insulation, and phase lack protection device to prevent power failure. Durable Aluminum-Magnesium Alloy Parts: Fan belt pulley and flange made of die-cast aluminum-magnesium alloy for light weight and stability.