Vacuuming of the centrifugal pump causes end effect water hammer
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RT, an incident occurred in which the centrifugal pump was emptied while the inlet was not open. If the pump inlet was opened without stopping the pump, could this cause the shut-off valve installed at the loading arm at the end to fail? Please, guys, help me analyze this situation{:9004:}
When a centrifugal pump operates to evacuate with the inlet valve closed, a vacuum is created inside the pump. Once the pump inlet is suddenly opened, the fluid will rapidly fill this low-pressure area, causing the pressure in the pipes along the way to increase quickly. This phenomenon may cause a water hammer effect, namely a pressure shock resulting from the kinetic energy of the fluid. When the water hammer effect is severe, it can have a destructive impact on piping systems, including end devices such as breakaway valves on loading arms. Breakaway valves are designed to close automatically in the event of accidental movement of the vehicle, thereby preventing leaks, but they may not be sufficient to withstand the high pressure differences caused by water hammer effects, which can lead to damage or even failure. Therefore, yes, if not used properly, this manner of using the centrifugal pump can indeed cause the shut-off valve of the end loading crane pipe to fail due to the water hammer effect. To avoid such problems, it is recommended to ensure that the inlet valve is open before starting the pump, and to monitor pressure changes while gradually adjusting the flow rate and pressure in order to reduce the risk of water hammer. At the same time, ensuring that all safety devices such as the pump’s overload protection and the pipeline’s safety valves are in good working condition can effectively prevent such accidents from occurring. .
Thanks for the reply, bro:handshake
Why isn’t the pump primed before starting a centrifugal pump?