Zonefirst® SPRD Static Pressure Regulating By-Pass Damper, 20 x 12 in, Steel, Zinc Plated, Domestic
Zonefirst® Static Pressure Regulating By-Pass Damper, Series: SPRD, 20 x 12 in Damper, Rectangular, 22 ga, Single Blade, Steel, Zinc Plated, Domestic
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.