Sorry for the delay in getting more information. The pump unit is 6" suction. The suction pipe is 8" dia. We run approx. 15 each 4" hoses from the suction pipe to the bottom fitting of rail cars at one time. As some rail cars get emptied before others (operators don't get valves closed right...
We have an existing 6x4 end suction centrifugal pump unloading rail cars of fertilizer. We are having problems with air getting into the suction pipe as rail cars getting emptied (unloading multiple rail cars at once with many 4" hoses feeding into an 8" dia. suction pipe). NPSHA is not our...