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We were down for a plant shutdown for a week. No work was done on the pump though. Motor direction is correct.

It was ok before. There are 5 other identical setups that are operating fine. The only difference being the others go to a drain instead of the nozzle, but it has operated ok before now.

I have attached the curve. I am not sure how closing the suction valve would not effect the discharge pressure. The suction side gauge is located approximately 3-1/2' above the centerline of the pump. I have not check the total flow rate from the nozzle, I really have no way to do so. This...

....one other thing, the nozzle have been cleaned and are not plugged.

Hello. I've used the forum several times in the past for information, but just recently decided to join. I have a Gould's 3196 1x1.5-8 that is under vacuum on the suction side of the pump (-15 to -20 in hg). The pump is supposed to pull the water out of the tank and feed some nozzles that...