Due to the rupture of the pipe network at the pipe section after the pressure reducing valve, closing the valve at P1 or overhauling, when the pump station A water pump stops running, the water pressure at the pipe section after the pressure reducing valve after the valve is very low or even empty. When the normal water supply is restored, when the valve in the pipe section before the pressure reducing valve opens suddenly or the pump in the pumping station A is opened, the pressure at the pipe section before the pressure reducing valve increases rapidly. Large pressure difference makes the pressure reducing valve too late to work, and the pressure in the upper cavity of the pressure reducing valve is very small. Driven by this large pressure, the pressure reducing valve is forcibly opened, causing the pressure before and after the pressure reducing valve to balance and reduce pressure. The valve fails for a short time, that is, series pressure.
Post time: Apr-28-2025