1) The radial runout of single-stage pump shaft shall not exceed 0.05mm, and the radial runout of multi-stage pump shaft shall not exceed 0.05-0.085mm.

2) The shaft end runout is less than 0.1mm

3) The perpendicularity between the sealing chamber end face and the shaft is less than 0.1mm

4) The axial displacement of the pump shaft shall not exceed ± 1mm (Special requirements based on actual design)