Uxcell 8 HVAC Duct Manual Volume Damper with Sleeve Adjustment Backdraft Damper

The manual volume damper is used for air volume regulation in an air ventilation system widely used in HVAC industry. With that installed in your HVAC systems you can easily control the air flow rate or close off an air duct if needed to some extent it will increase the energy efficiency of your system. Advantage 1. Made of durable Galvanized Iron which has high hardness and high temperature resistance not easy to deform and corrosion moisture-proof and fade resistant can be used for a long time; 2. The side is designed with a rotary handle which can adjust the air volume from multiple angles and is easy to operate; 3. The interface is smooth and flat easy to disassemble and install. Silicone rubber ring design can prevent the air duct valve from leaking when it is closed. Instruction Easy to install just simply slide the volume damper into the pipe you are attaching to and fix with pipe clamp and tape. NOTE: Please confirm the outer diameter of the volume damper before placing an order.