Self-priming Centrifugal Pumps
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Centrifugal Self Priming Pumps & Self Priming Water Pumps
Centrifugal self priming pumps are the ideal choice for water and light fuels when suction conditions are difficult. A standard centrifugal pump needs to have a suction pressure to operate. If however a pump is situated above the liquid level such as on top of a tank, then the pump needs to be self priming to draw the liquid in to the inlet. A self priming pump should have the casing filled with liquid prior to start up. Upon starting, the pump creates a vacuum ensuring liquid is drawn towards the inlet, separating the air from the water. The air is discharged through the outlet with the liquid remaining in the pump until sufficient liquid has been drawn up.
products
- Max Flow Rate: 300M³H
- Max Head: 105M
- Max Temperature: 130°C
- Max Viscosity: 200 cP
- Solids: 10mm
- Size: DN32 to DN150
- Max Flow Rate: 500M³H
- Max Head: 100M
- Max Temperature: 120°C
- Max Viscosity: 200 cP
- Solids: 0mm
- Size: DN32 to DN150
- Max Flow Rate: 700M³H
- Max Head: 100M
- Max Temperature: 190°C
- Max Viscosity: 200 cP
- Solids: 0mm
- Size: DN32 to DN150
- Max Flow Rate: Up to 2000M³H
- Max Head: Up to 150M
- Max Temperature: 120°C
- Max Viscosity: 200 cP
- Solids: 0mm
- Size: DN100 to DN250
- Max Flow Rate: 700M³H
- Max Head: 100M
- Max Temperature: 120°C
- Max Viscosity: 200 cP
- Solids: 0mm
- Size: DN50 to DN250
- Max Flow Rate: 1500M³H
- Max Head: 130M
- Max Temperature: 130°C
- Max Viscosity: 200 cP
- Solids: 0mm
- Size: DN50 to DN250
- Max Flow Rate: 1500M³H
- Max Head: 130M
- Max Temperature: 120°C
- Max Viscosity: 200 cP
- Solids: 0mm
- Size: DN50 to DN350
- Max Flow Rate: 2000M³H
- Max Head: 190M
- Max Temperature: 120°C
- Max Viscosity: 200 cP
- Solids: 0mm
- Size: DN150 to DN250
- Max Flow Rate: 6000M³H
- Max Head: 60M
- Max Temperature: 120°C
- Max Viscosity: 200 cP
- Solids: 0mm
- Size: DN300 to DN400
- Max Flow Rate: 7.2M³H
- Max Head: 52M
- Max Temperature: 50°C
- Max Viscosity: 200 cP
- Solids: 0mm
- Size: DN25 to DN32
- Max Flow Rate: 300M³H
- Max Head: 105M
- Max Temperature: 130°C
- Max Viscosity: 200 cP
- Solids: 10mm
- Size: DN32 to DN150
FAQs
A centrifugal pump transfers the kinetic energy of the motor to the liquid by a spinning impeller. As the impeller rotates, it draws in fluid causing increased velocity that moves the fluid to the discharge point.
Single stage centrifugal pumps have one one impeller, wheras multistage pumps have more than one. As the number of impellers dictate the pump's pressure capabilities, single stage pumps are typically used where flow rate is more important than pressure, whereas multistage pumps are designed for higher pressure applications.
A vertical pump means that the motor is installed above the pump head as opposed to being level with it. As this makes a vertical pump's footprint smaller than an equivalent duty horizontal, they are typically used when space saving is key.
The biggest advantage is that centrifugal pumps have a simplistic design with fewer components, making them smaller and less expensive than a positive displacement pump of the same duty.
Centrifugal pumps are typically designed for pumping low viscosity, clean fluids such as water, chemicals and light fuels.
With the exception of our specially designed Azcue CA pump, centrifugal pumps are unable to self prime without the help of an additional electric or vaccuum assisted priming pump which we can supply. If the suction conditions of your installation require a self priming pump, it may be that we advise of another pumping techology that is more suited.
Generally speaking, centrifugal pumps due to their tight tolerances are designed for clean liquids but if a vortex or open impeller is selected some solids are able to be handled. For more information on the impact of impellers, read our article https://www.castlepumps.com/info-hub/pump-impellers-the-types-their-impact
The flow rate of centrifugal pumps rapidly declines with an increase in viscosity duty to the internal friction. They are therefore typically designed for pumping low viscosity fluids such as water, chemicals and light fuels.
Unfortunately not. The high internal velocity/force that is applied upon the fluid by a centrifugal pump can damage or alter the consistency of a delicate fluid. Therefore, centrifugal pumps are designed for non-sensitive fluids such as water, light fuels and chemicals.
