Pipeline pressure difference issue
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I would like to ask the experts here: There is a system currently whose pressure difference between the inlet and outlet is too small (inlet pressure is 3.7 bar, while the outlet pressure is 3.4 bar). The configuration is as follows: 2 water pumps with a capacity of 450 m3/h each. The pipes used are DN300 for both the inlet and outlet, and the length of the pipes is around 200 meters; the outlet leads back to the roof, at a height of approximately 25 meters. I would appreciate it if you could advise me on how to increase this pressure difference
I’m not quite sure why it’s necessary to artificially increase the pressure difference between the inlet and outlet water Is it a fully enclosed system? Is there no constant pressure point? Consider increasing the pressure regulation with a stop valve?
Will a lower pressure difference result in less water flow through my equipment?
In the case of a single device, the water volume should be primarily determined by the pump; the water flow rate of the pump varies with the head loss across the entire piping network, as shown in the pump flow curve.
There’s no need for such a large pressure difference – why go for a higher one? Isn’t that a waste? Just add a flow meter and that’s it