Hello world.
I have a pumps system with three verticak pumps in parallel that takes water from a tank and pumps it to a building. It is controlled by pressure. Each pump runs at a time and each has its own check valve at the discharge. there is another check valve after the main discharge header and there is a another discharge valve after this main check valve. When the pump starts, it pressurizes the system at 150 psi. As soon as the pump stops, the pressure before and after the check valves starts to drop rapidly without water consumption and “stabilizes” at 105 psi. I tried to isolate the problem by just leaving 1 pump on, closing the other two pumps discharge valves, pressurizing the system, closing the main discharge valve that is after the main check valve and closing the remaining pump discharge valve and the gauge still drops. All the suction piping is made of carbon steel and also until the main discharge header. It then couples with sch 80 pvc piping. Between the header and the main discharge valve i have like 1 ft of pvc piping.
Does anyone know what could be happening? And what else can I try for the pumps not to run at a no flow condition?
I have a pumps system with three verticak pumps in parallel that takes water from a tank and pumps it to a building. It is controlled by pressure. Each pump runs at a time and each has its own check valve at the discharge. there is another check valve after the main discharge header and there is a another discharge valve after this main check valve. When the pump starts, it pressurizes the system at 150 psi. As soon as the pump stops, the pressure before and after the check valves starts to drop rapidly without water consumption and “stabilizes” at 105 psi. I tried to isolate the problem by just leaving 1 pump on, closing the other two pumps discharge valves, pressurizing the system, closing the main discharge valve that is after the main check valve and closing the remaining pump discharge valve and the gauge still drops. All the suction piping is made of carbon steel and also until the main discharge header. It then couples with sch 80 pvc piping. Between the header and the main discharge valve i have like 1 ft of pvc piping.
Does anyone know what could be happening? And what else can I try for the pumps not to run at a no flow condition?
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