Will be required to move the additional solidsįrom the pump to the discharge point. The consequence of higher production is that more pump speed and power An unintended consequence occurs when the jet enablesĪn increase in the rate of production. Using a one-size-smaller pipe will restore some of the velocity reductionĬaused by the injection of water through the Pipe between the suction inlet and the inlet of the jet assist body shouldīe one pipe size smaller than the pipe connected to the jet discharge port. Low suction inlet velocity unless proper precautions are taken. Solids have to be readily available closer to the suction inlet.
The jet, which causes a corresponding reduction in the amount of water entering the suction inlet. Portion of the water flowing through the dredge system is injected by To the contrary, the installation of a jet system can actually decrease
To fall and solids to fall out of the flow until the suction is cleared.Īt the suction inlet. That condition will cause the pump to cavitate, the velocity Will receive only 30 to 50 percent of the total flow Raised to reduce vacuum and assure the full flow of liquid to the pump. Without a jet, a small cave-in will likely require that the suction be Operation because a significant proportion of the water required by the pumpĬomes in through the jet and less water has to come in through the suction If that is all it does, it is a damned expensive priming system. Numerous times I have heard operators tout pump priming as the jet’s greatest benefit. Go deeper, perhaps to 55 or 60 feet, and still maintain a production rate of Increase the operating vacuum to 20 to 22 inchesĪnd increase solids production to 350 tph from a depth of 35 feet. Add a jet system to that dredge and it will be able to maintain the same 250 tph from 35 feet with an operating Maintaining 20 to 22 inches of vacuum without a jet while producing solids at the rate ofĢ50 tph from a depth of 35 feet. Effective vacuum is the total amount of vacuum that can be utilized to raise solids up to the pump inlet port. Suction jet assist makes the equivalent of an extra 10 or 15 inches of effective vacuum available at the dredge pump inlet.
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