Inlet Piping Requirements Of The Canned Vertical Turbine Pumps (double casing vertical barrel centrifugal pumps)

Inlet flow disturbances, such as swirl, unbalance in the distribution of velocities and pressures, and sudden variations in velocity can be harmful to the hydraulic performance of a Canned Vertical Turbine Pump (double casing vertical barrel centrifugal pump) , its mechanical behavior, and its reliability.

The minimum required straight pipe length (L2) before pump suction inlet is specified.

The straight pipe section is to be the same diameter as that of the Canned Vertical Turbine Pump (double casing vertical barrel centrifugal pump) section nozzle.

The pipe length L2 depends on the distance between suction nozzle and hydraulic inlet L1 and on the Can inner diameter øD1.