The operation can be broken down into two steps: Suction: Liquid is sucked into the center of the rotor through an opening Distributor whose role is to conduct the fluid from the suction line to The inlet section of the rotor. The pump being primed, that is to say full of liquid, the Speed of the fluid entering the wheel increases and hence the pressure in The hearing diminishes and thus generates suction and maintains the priming. Acceleration The rotor transforms the mechanical energy applied to the The machine in kinetic energy. At the outlet of the rotor, the fluid is projected into the The purpose of which is to collect the fluid and return it to the outlet section. The Section being given to the liquid being more and larger, its kinetic energy Transforms into pressure energy.
The flow rate qv supplied by a centrifugal pump is the volume displaced during the unit of time. It is expressed in cubic meters per second (m3 / s) or more in cubic meters Per hour (m 3 / h).
Communicated to the liquid pumped to the absorbed power Pa.It is defined by:
– qv: the volume flow of the fluid in m3 / h
– H: head
– Pa: Power absorbed by the fluid.
– e the density of the fluid.
The “NPSH” “Net Positive Suction Head” is a characteristic given by the Manufacturer qualified as “NPSH required”. In particular, it takes account of the The pressure which the fluid undergoes during its acceleration at the input of the wheel. For a pump to operate normally, the available (calculated) NPSH must be Greater than the required NPSH (as specified by the manufacturer). NPSH disponible > NPSH requis
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