Necessary technical parameters when choosing an industrial pump

Necessary technical parameters when choosing an industrial pump


1. Capacity:

Flow rate is the amount of fluid flowing through a hydraulic machine in a unit of time. Flow can be measured by volume, weight, or mass. The corresponding symbol is Q. The corresponding standard unit is m3/s hoặc m3/m.

2. Pump head or Head:

The pump head, often referred to as the total dynamic head (TDH), is a critical parameter in fluid mechanics and engineering, particularly in the context of pumps. It represents the total energy or pressure that a pump must generate to move a fluid from one point to another within a piping system. Understanding the pump head is essential for selecting the right pump and designing an efficient fluid transportation system.

The pump head is typically expressed in units of length, such as meters or feet, and it represents the height to which the pump can raise a fluid or the pressure it can create to move the fluid against resistance. The corresponding symbol is H.

3. Power:

It is the power consumed to create flow Q and pump head H. The unit of measurement is kW or HP. ( 1HP= 0.75kW).

Types of pump powers:

3.1 Useful power: It is the energy consumed by the pump to pressurize the liquid.

3.2 Power on the pump shaft (shaft power): This is the power that compensates for the energy lost due to friction in the shaft, characterized by a useful coefficient. This power may vary due to the different pump performances of each manufacturer.

3.3 Motor power: The motor consumes more energy than the pump because the energy transmitted from the motor to the pump is partly lost due to the motor’s work, the transmission between the motor shaft and the pump, due to friction on the shaft.

4. Revolutions Per Minute (R.P.M):

This is a physical quantity that indicates the rotation of circular motion in a certain period of time (usually measured in minutes).

5. Suction and Discharge Pipe Diameters:
The unit of measurement for pipe diameter is usually calculated in millimeters or inches depending on the different manufacturers. Calculating the suction and discharge pipes is very important because it will affect the flow and pressure head of the liquid passing through the pump.

6. Centrifugal Pump Stage:

Centrifugal pumps can have more than one impeller stage. Single-stage pumps are also called single-stage pumps and multi-stage pumps are also called multi-stage pumps.



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