For media with relatively high concentrations, should a pump with high speed or one with low speed be chosen?
Thread Content
The concentration of the medium being transported is high; it is sludge with a water content of 99.2%. Should a pump with 2900 revolutions per minute be used or one with 1450 revolutions per minute? Why? Is there anyone who can explain the reason?
It is not recommended to choose a grade 2 motor, as it experiences significant wear.
Could you explain why the wear on secondary motors is greater than that on quadrupole motors?
Personally, I think it’s better to choose one with a lower rotation speed; also, it depends on what type of pump you are choosing
With a high rotational speed, natural wear is greater.
When the slurry pump we were using developed significant wear in its pump body, the manufacturer suggested changing the speed from stage 2 to stage 4; in my opinion, the reason for this is that a higher speed leads to greater friction
When selecting a pump, it is necessary to take into account the linear speed at the edge of the impeller of the centrifugal pump; there is an upper limit for this speed, as excessively high speeds lead to rapid wear. More professional pump design and manufacturing companies will conduct calculations during the selection process. I have seen pump selection documents from a foreign company, and one of the items included was reviewing the linear velocity of the impeller.
A pump with a lower rotation speed should be chosen!
The concentration level is not an issue; what matters is the particle wear resistance and viscosity. If there are hard particles present, using a low speed will result in less frictional wear； If the viscosity is high, a low speed should also be used, which can reduce power consumption.
Personally, I think it’s better to choose one with a lower rotation speed; also, it depends on what type of pump you are choosing