... ISO 9001:2000 3 used for vacuum packing, concentration, distillation, drying BrandHuadongModelHDSR-V-50ItemRoots blowerTypeHDSR vacuum pumpFlow rate0.86-2.46 ... oil 7 with nitrile rubber seal rings Usage: vacuum packing, vacuum metallurgy, vacuum distillation, vacuum concentration and vacuum drying, smelting, off-gassing, rolling as ... at sightDelivery time: within two weeks Tri-lobe roots vacuum pump