What Are the Performance Parameters of a Slurry Pump?

Slurry pump including 6 performance parameters: flowrate, efficiency, head, speed, shaft power, permissible suction vacuum height, and NPSHr (net positive suction head).

1. Flow rate (pumping volume)

Quantity of liquid conveyed by the slurry pump in a unit of time Q

The unit of volume flow is m3/h or L/s.

The unit of weight flow is t/h.

2. Head

The work done by the slurry pump on a unit weight (1kg) of liquid, i.e., the value added to the energy of a unit weight of liquid after passing through the pump:

H is N.m/N, which can be converted into the height of the column of liquid sent (m);

is expressed by the international unit of pressure, Pa, in the engineering.

3. Shaft power

The power transferred to the slurry pump shaft from the prime motor is called shaft power: N

When the prime motor is an electric tractor, the unit of shaft power is expressed in kw.

Effective power -- The energy obtained by the liquid flowing through the slurry pump within a unit of time is called effective power.

4. Efficiency

The ratio of the effective power of the slurry pump to the non-shaft power: η  

The rotational speed of the impeller of the slurry pump is usually expressed in terms of the number of rotations per minute, which is indicated by the letter n, and the common unit is r/min.

NPSHr (net positive suction head) - It refers to the excess energy per unit weight of liquid at the inlet of the slurry pump that exceeds the saturated vapor pressure.

Allowable suction vacuum height (Hs) - It refers to the maximum allowable suction vacuum height (i.e., the maximum vacuum degree at the slurry pump's suction inlet) when the slurry pump operates under standard conditions. The unit is mH2O