Questions regarding the design pressure of the pump system
Thread Content
The standardized notation is really hard to understand. When the design pressure of the container into which the pump draws fluid is much higher than the normal pressure in that container (in other words, there is a large pressure difference between the pump’s shut-off pressure and the normal discharge pressure, allowing the design pressure of the equipment to be set at the pump’s shut-off pressure without causing leakage from the safety valve), the design pressure for the equipment at the pump outlet is the pump’s shut-off pressure. First, under what conditions does the design pressure of the pump’s suction tank become much higher than the normal pressure? Second, what is meant by a safety valve leaking? Finally, the sentence in parentheses is unclear – why is there a large pressure difference between the outlet shutdown pressure and the normal discharge pressure, and what does this have to do with the design pressure of the pump’s suction tank?
Normally, if a tower is extremely tall, its design pressure is much higher than the pressure under normal operating conditions – due to the great height difference, there is a large pressure difference between the top and bottom of the tower. As for the issue you mentioned regarding the pump’s outlet valve being closed, it’s easy to understand: the flow rate of the pump is controlled by valves. When there is no flow from the pump, its outlet pressure becomes very high, and this pressure can cause the safety valve in the pipeline to activate. Have you never worked on site before?
This takes into account the possibility of accidental operation: if the pump does not draw fluid, the pressure inside the container will rise. The greater the inlet pressure of the pump, the greater the outlet pressure as well
Yes, I haven’t been to the site. I don’t understand what is meant by \"safety valve leakage\". Once the safety valve activates, it does so – what does leakage mean in this context?
I know that, I just can’t understand some of the explanations
It’s actually just the safety valve activating; what’s said isn’t scientific