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2022-09-30

1. Vortex shell: (1) ductile iron 250 450 (2) silicon molybdenum (molybdenum 3.8%) (3) containing nickel 1-12% can be optional 2. Middle body: gray iron 250 3. Pressing: (1)104 no need to temper (2) 101 needs to be tempered (special requirements) 4. Steel wheel: (1) K213 (2) K418 (3) K418B (M246) natural gas and aircraft 5. Impeller: (1) C355 domestic number 105A (2) five-axis impeller that is, aviation aluminum has 2618 and 7075 6. Floating bearing: CW713R 7. Thrust bearing: CW713R φ70 below φ70 above 10-10 17-6 8. Sealing ring: 3Cr13 coating 9. Shaft: 42CrMO 10. Oil baffle; 304 stainless steel 11. Rear plate: 304 aluminum alloy