BD90-3 is a new designed Battery type industrial vacuum cleaner with separate upper and lower barrel structure, It has a number of new design patents, use of air reflux principle, no need shutdown, by switching the slider can be effective ash removal. It has advantages of zero maintenance, zero fault .24V,1650W, 90L capacity,100AN,lithium battery,3 Brushless motor, three gear control, high suction and strong efficacy.