Which constant pressure pump is the best choice?
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This post was last edited by weizi23 on 2011-2-9 at 17:37. Hot water at around 70 degrees is being delivered, with a flow rate of 1 cubic meter per hour; the resistance inside the device is unknown. If it’s just used for heating, the resistance should not be high. With a pressure of 0.2 Mpa, I’m thinking of choosing a magnetic vortex pump with a capacity of 1.4 cubic meters and a head of 40 meters – is that wasteful? If it’s a centrifugal pump, can’t it maintain a constant pressure? What types of pumps can maintain a constant pressure? Thank you!
It forms a flow control system: a flow meter and a pressure transmitter are installed on the pipeline after the pump, along with secondary instruments in the control room, which enable the pressure to be maintained at a constant level
Reply to 1# weizi23: A positive displacement pump can ensure a constant outlet pressure regardless of changes in flow rate.
Positive-displacement pumps will work, but will the cost be a bit high?
Positive displacement pumps are not suitable for pumping media such as water. The viscosity is too low, resulting in high internal leakage. It won’t have a long lifespan.