Material characteristics: 304/316 stainless steel is mostly used, which is resistant to water vapor and slight acid and alkali corrosion. It is not easy to rust and oxidize during long-term operation. It is suitable for humid or slightly corrosive working conditions.

Structural features: multi-step concentric reducing design is adopted. Shaft segments with different diameters are respectively used to install bearings, impellers, transmission wheels and other parts, so as to realize accurate limit and torque transmission.

Appearance: the surface is subject to fine turning and polishing treatment, with uniform metallic luster and no obvious machining burrs. The transition fillet of the shaft section is smooth to avoid stress concentration.