DuFlon Polymers [Pvt] Ltd. Offers Metal Casting Lined Pump. DuFlon Polymers [Pvt] Ltd. Has been awarded with ISO 9001:2000 certifications. Metal Casting Lined Pump comes with pump casing impellers [open or closed], cans [shells], bearing carriers, shafts, back plates, magnets, gaskets and spacers, o-rings and seals.