This 4-inch duct reducer is a versatile backflow preventer that can be used in a variety of settings, from maintaining home HVAC systems to managing airflow in industrial environments. Its adaptability makes it an invaluable tool.

Crafted with a combination of galvanized steel, aluminum, and stainless steel, this damper is built to last. The galvanized steel construction ensures durability and the ability to withstand different environmental conditions, while the aluminum leaflets and stainless steel shafts and springs guarantee consistent, reliable performance, even in temperatures ranging from 14 to 140 Fahrenheit.

Measuring approximately 3.9 inches in diameter and 3.46 inches in height, this air duct damper is designed to fit 4-inch ducts with ease. Its convenient size allows for versatile installation in various duct systems, promoting efficient airflow.

The key features of this 4-inch duct reducer include its one-way, two-spring-loaded folding blades. This design ensures maximum air balance, allowing uninterrupted airflow in the desired direction while preventing reverse airflow. The damper can be inserted into both flexible and non-flexible ventilation ducts, further expanding its applications.

Installation is a straightforward process. Simply push the vent blocker into the ventilation pipe until it reaches the end. When installed horizontally, the position of the spring should be horizontal to allow for optimal opening and closing of the flap. The flap opens under the pressure generated by the airflow and then closes automatically under the action of the spring when the air volume is low.

The product package includes four 4-inch backdraft dampers, providing a comprehensive and user-friendly experience. This bundled set makes it easy to replace or install multiple dampers in different locations simultaneously, saving time and effort.

In summary, this 4-inch duct reducer is a high-quality, multi-purpose backflow preventer that offers exceptional durability, versatility, and ease of use. Its robust material composition, efficient design, and convenient installation make it an ideal choice for a wide range of HVAC and industrial airflow management applications.

product information: