Zonefirst® Static Pressure Regulating Damper, 8 in Damper, Round Shape, 22 ga Gauge, Steel, Galvanized
This barametric by-pass damper is a single blade, counter balanced weighted damper that operates on air pressure in order to control the flow of by-pass air. The SPRD has an adjustable arm and weight to maintain the correct amount of pressure in the duct system.