Ruskin model ZBBD25 barometric bypass dampers are used to automatically bypass excess air when the duct static pressure increases due to the closing of zone dampers. The barometric bypass dampers relieve excess air in duct systems through the use of a counter-balanced controlled arm weight. Various relief air control settings are created by simple adjustment of the weight on the arm. The weight can be moved either direction along the entire length of the arm to allow the damper to open at the desired pressure.
"Since 1958, Ruskin is the name in air management solutions that engineers, architects and contractors rely on to make buildings safer, more energy efficient and comfortable. Our mission is to make everyone comfortable. From the owners, to the designers, to the installers, to the occupants, Ruskin and our industry partners strive to make your well-being our top priority. We offer the most complete line of air control and architectural products and support them with our reputation for quality design and precision manufacturing. With Ruskin, every product is backed by cutting-edge technology, rigorous testing, on-time delivery and technical support".