1.Use double-suction impeller to make the axial force offset each other.
2.Open the balance hole or install the balance tube.
In the impeller on the rear cover of the impeller population to open a few counterbalancing holes, so that the front and rear cover space, while in the back cover of the axial side of the additional seal ring, the diameter and impeller inlet ring diameter the same. This structure is simple, but an increase of internal leakage, but also make imports more turbulent flow, lower single-stage centrifugal pump efficiency. Open balance hole is still 10% -25% of the axial force from the bearing to bear. You can also install the balance tube, from the rear cover near the pump casing openings, the balance pipe connected to the single stage centrifugal pump suction chamber.
3.Use balanced blades, leaves the back of a few additional radial blades, rotating, the impeller back pressure will be reduced to reduce the axial force.
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