Self-priming centrifugal pumps can vent air from the suction line after a single filling and build up the flow rate independently.
They are used for suction heights, variable inflow, or for emptying tanks and containers.
We support you with technical design to help you make the right choice.
Self-priming jet pumps
Delivery rate: 0.3 / 8.4 m³/h
Funding level: 18 / 55,5 m
Performance: 0.55 / 1.5 kW
Self-priming jet pumps
Delivery rate: 0.25 / 9.5 m³/h
Funding level: 15,5 / 74,5 m
Performance: 0.55 / 2.2 kW
Multistage, horizontal self-filling monobloc pumps
Delivery rate: 1 / 8 m³/h
Funding level: 14 / 51 m
Performance: 0.45 / 1.1 kW
Self-priming centrifugal pump with open impeller
Delivery rate: 3.6 / 66 m³/h
Funding level: 3,3 / 33,6 m
Performance: 0.55 / 7.5 kW
Self-priming liquid ring pumps
Delivery rate: 0.12 / 2.4 m³/h
Funding level: 6,5 / 53 m
Performance: 0.15 / 0.75 kW
Self-priming liquid ring pumps made of stainless steel
Delivery rate: 0.4 / 14.7 m³/h
Funding level: 0 / 60 m
Performance: 0.22 / 4.5 kW
What are self-priming pumps and how do they work?
Self-priming pumps can discharge air from the suction line after a single filling and establish the flow rate independently.
The air/liquid mixture is circulated in the housing until the suction line is filled with liquid.
After that, the pump operates like a normal centrifugal pump in continuous operation.
Do self-priming pumps still need to be pre-filled?
Yes. Even self-priming pumps require at least one initial filling.
The pump housing must be filled with medium before commissioning so that the suction line can be vented.
For which applications are self-priming pumps suitable?
Self-priming pumps are used when the pump above the medium stands or air proportions occur in the system.
Typical applications:
What are the limitations of self-priming pumps?
The suction capacity does not replace a clean design of the suction line.
The maximum possible suction height is physically limited by atmospheric pressure, temperature, and pipe losses.
In addition, the hydraulic efficiency Self-priming centrifugal pumps often slightly below those of normal suction designs.
Which designs are considered self-priming pumps?
Depending on the application, various self-priming designs are used.
Typical examples:
The appropriate design depends on the medium, volume flow, delivery head, and gas content.
What data do you need for the design?
For a suitable design, we require: