Regarding the issue of flow velocity in float ball sight glasses
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Hello, experts. I have a question: there is a sight glass on the return pipeline for the circulating water used to cool the pump seals, and there is a small ball inside that sight glass. When water flows through, the small ball will float up and stay on the outlet side. I would like to ask at what flow rate above a certain value will this small ball achieve this effect. Because, when the flow velocity is extremely low, the small balls sink to the bottom.
It’s just a flow indicator that tells you whether water is flowing or not
The float mirror is only used to help you observe whether there is water movement; in cases of high water volume, the float will rise, but the flow rate cannot be seen； An impeller sightglass can be selected; the flow rate can be determined by observing the rotation of the impeller inside the sightglass, which is more intuitive.
In foreign projects, there are some cases where the flow rate is low; in such situations, the balls rise only slightly or not at all, and it’s unclear whether the flow rate is sufficient for cooling purposes.