Add chemicals to the water pump to prevent cavitation?
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There is currently a pure water centrifugal pump that circulates water within the system; the water temperature is around 80°C. Since the installation height does not meet the requirements for preventing cavitation, and it is also inconvenient to increase the pressure in the water system, is it possible to add ethylene glycol or other substances to the water to prevent cavitation? Is this feasible? Are there similar practices in industry? Is there any other way?
I have not encountered such a practice. To prevent cavitation, it is necessary to increase the NPSHa (the net positive suction head available) so that NPSHa > NPSHr (the net positive suction head required by the pump). This involves reducing the geometric suction height (or increasing the geometric backflow height)； Reduce suction losses, increase the pipe diameter, minimize the length of the pipelines, as well as bends and accessories ； Prevent operation at high flow rates for extended periods.
The key elements have now been determined: the height, the pipe diameter, the number of bends, and the pump has been purchased.
I’ll hold on myself for now, waiting for the expert: lol