Pump Stations: Inlet Considerations

Kellen Easter Blog, Jensen Water Resource Blog, Pump Stations

The job of the inlet is to convey the liquid from the inlet pipe to the impeller entrance in a fashion that imposes minimal loss, and creates the most uniform velocity profile at the impeller entrance. Therefore, the ideal inlet geometry is a straight pipe entrance with a slight taper from the pipe flange to the impeller eye. The taper slightly increases the velocity and tends to stabilize the fluid streamlines prior to the impeller. All curved inlets cause at least a minor penalty and in some cases a major efficiency penalty. This includes straight inlets with an elbow attached …