Backflow at the liquid inlet of the venturi injector
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Venturi model WGP-1007, inlet and outlet diameter DN40, suction port diameter DN25, inlet and outlet connection pipe diameter DN25. The pump outlet flow rate is 3 cubic meters, with a pressure of 4 kilograms. During resin regeneration, the liquid suction port flows back into the chemical tank. Upon disassembly for inspection, no damage or missing parts were found. Why is that? How can this be solved, other than by replacing it? 1844
This is likely due to the negative pressure generated within the branch pipe by high flow rates; the magnitude of this negative pressure depends on the flow rate, that is, the pressure difference before and after the spray tube. Fluid backflow should be a process control issue. For reference.
It’s likely that those two cones are eccentric; the water doesn’t flow out, instead it goes against the pipe walls and causes leakage, which prevents a negative pressure from being created, resulting in backflow from the suction port