Regarding the diameter change of centrifugal pumps.
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There is a pump of the model IH80-50-250, equipped with a 50-65 diameter reduction pipe connected via flanges. It’s not known whether this has an impact on the flow rate and head pressure. Help, oh helpful internet friends!
Reduction in diameter at the outlet. . There’s basically no impact; it’s only 50-65. . It’s okay. . .
There should be no problem. By calculating based on the pump’s flow rate and the pressure of the medium entering the pump, if 65 is not sufficient, a pipe with a diameter of 89 can be used instead
IH80-50-250: rotation speed of 2900 revolutions per minute, flow rate of 50 m3/h. The 65mm pipe is a bit small; using an 89mm pipe would be better
It is recommended that you check the piping requirements for centrifugal pumps: the diameter of the inlet pipe of a centrifugal pump should be 1–2 sizes larger than the diameter of the inlet； The inlet diameter of the reciprocating pump should be 1–3 sizes larger than the inlet diameter, after which it should be equal to it ； In short, hydraulic calculations are required to ensure that the necessary net positive suction head is met for the pump. The outlet pipe is generally 1-2 sizes smaller than the inlet pipe
It’s possible, but it’s best to have more than 4 times the length of straight pipe section at the outlet, followed by a reduction in diameter.