... 1.Operating principle WF series spiral classifier for powder specific podwer project is the whirlpool superfine classifier with the secondary air inlet ... the fibrous materials, so as the profession of Chemical industry, Mineral, Building materials, Electronic, Pharmacy, Pesticide, Paint, Dye, Food, ... *780*14401420*1100*17802280*1626*2808 WF series spiral classifier for powder specific podwer project