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Radial Thrust at Shutoff

Worst-case radial load on the shaft — volute reaction at shutoff plus the weight of the rotating parts.

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m
m
m
kg/m³
—
≈0.28 at shutoff for a single volute; lower for diffusers.
kg
kg
kg

Result

Fill in the fields — the result appears as you type.

Method & assumptions
R = Kr · H · ρ · g · D2 · b2 Fr = R + (Wi+Wshaft+Wsleeve)·g

Stepanoff-style volute reaction force plus rotor weight, in newtons. Shutoff is the severe case for a single-volute casing — at BEP the radial load is much smaller.

Engineering aid only — verify results against the applicable code edition and the equipment datasheet before committing to a design.

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