Gravity Shutters are designed to prevent backflow and to equalize the pressure across the system. Each gravity shutter is carefully designed to equalize the pressure in areas like a compressor room, a fan room or an exhaust system with that of the atmosphere aided by gravity. These devices are employed at the end of an exhaust duct where it opens up when the exhaust fan is turned ON, closes down when the fan is turned OFF. The frames and blades are extruded Aluminium alloy. Blades are selected according to type of application and size of shutter. Assembled products are electrostatic polyester powder coated to any architectural finish