Priming and auxiliary supplies Of The Vertical Turbine Pumps (VTP pumps)

Ensure electrical, hydraulic, pneumatic, sealant and lubrication systems (as applicable) are connected and operational.

Ensure the inlet pipe and pump casing are completely full of liquid before starting continuous duty operation.

Pump submergence

Minimum submergence is required to prevent vortex formation.

The submergence varies in general from 2 to 3 times the nominal bowl diameter and is always specific to each pump model. The submergence needed for adequate NPSH to the first stage impeller may be different from the general rule mentioned earlier.

Location of the first stage impeller eye to be taken into account for minimum priming submergence. It is also equally important to take note of the minimum distance to be maintained to the suction bell from the sump floor (with or without strainer). Therefore, refer to the Flowserve supplied general assembly drawing on minimum submergence or contact Flowserve before the pump is started.