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Throttle Pump Outlet? 5

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mjpetrag

Mechanical
Oct 16, 2007
224
I currently have a tank water pump that is cavitating. I can throttle the flow by closing the butterfly valve on the discharge, and this stops the cavitation. But I was wondering if there was a more suitable permanent solution (not looking to install an orifice plate since there are 4 pumps in a row that run at different rates). I was thinking of changing the impellar size or its housing.
 
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I'm with Johnny Pellin and agree that an orifice plate is probably the quickest, cheapest and easiest fix. It allows the pump to run out on its curve to where you elect, ie, anywhere prior to cavitation and it does not interfer with 2, 3 or 4 pump operations. All other "fixes" are complicated and expensive and excessive for this installation.
 
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