How does the operator use CONVAC after it is installed and ready to go to work?
He enters the low velocity setpoint using the keypad. This entry programs the CONVAC to guard against pipeline plugging. Next, the operator uses the keypad to enter a vacuum setpoint. As long as excess pumpable solids are available at the suction inlet, CONVAC will automatically admit water into the suction pipe at the rate required to maintain the vacuum at the set point value. Then the operator’s maneuvers the dredge to keep excess pumpable solids continuously available at the suction inlet and occasionally adjusts the vacuum setpoint.
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