... -saving,seal operation and accurate. It is widely applicable to chemical,petroleum,paint,food,pharmacy and other industries.Novel design,small ... , bleaching clay, hydrogenated oil, winterized oil, stearin etc.Petroleum and chemical products: diesel fuel, lubricant, paraffin wax, mineral oil etc.Beverage ... , vitamin etc.minerals: coal dust, cinder and so onother: air, water purification etc.