Vertical centrifugal pump modified from a self-priming pump
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Pumps are planned to be installed in an environment with abundant groundwater. Due to the impact on construction conditions, it is planned to replace vertical centrifugal pumps with surface-mounted self-priming pumps; horizontal centrifugal pumps can achieve self-priming by adding a self-priming tank. So, can vertical centrifugal pumps also achieve self-priming by adding a self-priming tank? Please, experienced experts, give me some advice! Please share any successful cases!
Vertical centrifugal pumps can also achieve self-priming by adding a self-priming tank. The function of a self-priming tank is to create a certain level of vacuum in the pump body and the suction pipeline before the pump starts up, thereby assisting the pump in self-priming. Typically, a self-priming tank is installed at the suction side of the pump, and the tank must be filled with liquid to ensure that the pump can quickly draw in the medium at startup. Such modifications require consideration of the pump’s flow rate, suction lift, discharge capacity, and the properties of the medium; a self-priming tank of appropriate size must be designed, and the system must have good sealing to maintain negative pressure. For successful cases, it is recommended to look for specific project examples or shares from engineering technicians. In actual operation, valves, check valves, and other control systems may also be required to ensure the proper functioning of the pump. .
The principle is the same, and it can be achieved in both cases. It should be noted that the vacuum tank is 5-7 times the effective volume of the pipeline.
As long as the process requirements of the pump are met, it can be used freely for reference purposes.
Be careful not to have too many bends or excessive distances in the intake pipeline, as this will increase resistance
It can be changed to operate with a self-priming pump； The volume of the self-priming tank must be 1.5 times greater than the total volume of the inlet pipeline
Are there any standard specifications or industry standards for the volume of self-priming tanks?
Regardless of the replies, I would say that your idea is bold and innovative; it’s theoretically feasible, but only on the condition that there is sufficient suction capacity.