KROSS AIR manufactures high quality volume flow control dampers,specially designed for use in HVAC Heating,Ventilating and Air conditioning systems for  volume,flow and pressure control of air in the ducts. The light,medium,and heavy duty construction of VCD s allow even distribution and flow control of air,even with high duct pressures and are suitable for various types of site applications.Blade action,either parallel or opposed in operation with blade tip seals are fitted to ensure for minimum air leakagstandard construction.Blade action,with gear wheel opposed construction is optional sensitive applications operations.For low leakage (less than 1%)S.S.jamb seals are provided between blade and the frame construction,which is optional.