AP Alloy Industries is a foundry producing industrial pump parts, valves and complex machinery components with high-precision investment casting (lost wax casting). PRODUCT TAG Description Vacuum Pump Impeller Method Investment Casting Materials CF8M(1.4408) Dimension 260 x 260 Weight 31.5KG Due to the structure of the vacuum pump impeller, it is really hard to do shell removal. Here are some of the different sizes of vacuum pump impellers we have made : rent sized double suction impellers we have made : No. Key Dimension(mm)                    External dia. X Height Weight(KG) Material  Reference Photos 1 216.5 X 79.75 10 Aus, Martensitic and Duplex stainless steel                       ASTM                                            CF3M, CF8M, CF3, CF8, CN7M, CA6NM, CD3MWCuN/6A, CD4MCuN/1B, 2205, 3A, 4A DIN-EN                                            1.4308, 1.4309, 1.4306, 1.4571,1.4317,GX20Cr14,1.4116,1.4313,1.4460, 1.4460K, 1.4462, 1.4470 BS                                         1.4552, 1.4409 2 216.5 X 109.75 13 3 216.5 X 160.75 15.4 4 216.5 X 214.75 20.8 5 260 X 182 26.5 6 260 X 260 34.5 7 376 X 252.6 67.2 8 376 X 372.6 88.8 9 376 X 408.6 99.8 10 240 X 120 18.84 11 240 X 155.7 23.8 12 368 X 119.6 44.9 13 500 X 219.5 156.1 We have produced different sizes of vacuum pump impellers, the above sizes shown just for reference. The dimension of the largest one we have produced is �500mm X 219.5mm, weight 156.1kg. We can make other sizes of vacuum pump impellers according to your specification, please feel free to contact us.  are used to suction or compressed air and other non-corrosive, insoluble in water, does not contain solid particles of gas, suitable for mining, chemicals, light industry, food for vacuum evaporation, vacuum degassing and the like.