hi
I have a pump that has caveatted due to running at a very low flow. Now I need to calculate the flow at which the pump will cavitate. I know it value is given by the vendor but I want to know how to calculate it.
also the minimum continuous stable flow.

Thanks,
Original Post
More info is required, mfg/model of pump/rpm/what are you pumping/temp of product/what is on suction side of pump/pressure readings suction and discharge/specific gravity of liquid/viscosity of liquid/motor amps/motor hp/motor rpm/elevation of pump in relation to sea level? Do you have the curve for this pump?
Dave
What is your purpose of "calculating" the flow at which the pump will undergo cavitation if you have this information from the vendor's documents?

In your post, it is stated that cavitation took place at a low flow rate. I guess, the tendency to develop cavitation increases as the flow rare increases (not the other way around).

In general, cavitation can take place if the suction pressure decreases, flow increases, suction temperature increases or the liquid being pumped changes its vapor pressure.

In most cases, the first parameter to check for cavitation is the suction pressure.

To determine the minimum flow rate the pump can deliver before it undergos cavitation, you need the pump curves. To make this task easier for everyone, maybe it is better to share the curves here.

Regards-Ali M. Al-Shurafa

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