In the chemistry of plating, and metal finishing, agitation renews the cathode film, decreases polarization and enables the use of higher current density. This means finer grain deposits and higher plating speeds. In rinsing, agitation prevents localized concentration of drag-in. It also lowers drag-out and minimizes the amount of rinse water needed. Lower rinse water loads reduce the size and cost of water treatment equipment required by environmental authorities. Two varieties of agitation are popular, viz, air agitation and eduction / whirling. Air : Turbo blower has dynamically balanced double faced impeller for oil-free air flow, generated by volume displacement, there is no metal-to-metal contact and has a specially designed silencer for low noise level. - Oil-free, no lubrication required. - Non-pulsating flow. - Low maintenance. - Compact in design. - Light weight. - Low noise.