Problems with shielded pumps
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The rated minimum flow rate of a high-temperature separation-type shielded pump is 4.1 m3/h, while the maximum flow rate is 8.1 m3/h. The flow rate required for production is 4.2–5.1 m3/h; the pump operates at near its minimum flow rate, which causes vibration in the pump. I need help understanding what impact reducing the inlet diameter of the impeller will have on the outlet head and flow rate, and what the proportional relationship is. Thank you.
The simplest method is to install a tee on the outlet pipe and add a return line.
The essence of a shielded pump is a centrifugal pump; refer to the impeller design of centrifugal pumps