Variable diameter at pump inlet and outlet
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The last edit to this post was made by 1016006686 on 2019-1-14 at 11:01. 1. Pump inlet: 1-1/2” HG20615, 2500 Lb, nominal diameter of 40. 2. Pump outlet: 1” HG20615, 2500 Lb, nominal diameter of 25. The pipe size for the entire system is an outer diameter of 19 mm and an inner diameter of 12 mm. It’s not clear whether the diameter change at the pump is of a concentric type or an eccentric type. The entire pipeline forms a water circulation loop, with all pipes being horizontal. The pump has an inlet on the side and an outlet on top; what is the best way to handle the diameter change in this case? What factors need to be taken into consideration?
Personal understanding: They are all horizontal pipes; the pump has an inlet on the side and an outlet on top. The inlet is a horizontal pipe, using an eccentric elbow with a flat top ； Direct diameter change after export, concentric reducing/expanding joints.
The inlet pipe is as shown in the figure; the outlet doesn’t matter
If the pump’s inlet is large while the pipe is small, that means the diameter increases from the pipe to the pump inlet; won’t this cause cavitation? I’d like some advice
I’ve seen this before; it involves a change in diameter from the pipeline to the pump inlet, that is, from small to large, which is the opposite of what’s shown in this diagram. Could there be any negative effects?
The diameter at the pump inlet decreases from large to small; as for the outlet, it increases in size. The diameter of the inlet pipe should be no smaller than that of the pump inlet
One is the suction case and the other is the backflow case; the directions of eccentric diameter change for the two are different
This post was last edited by 1016006686 on 2019-1-14 at 12:05. Since it’s a closed loop, the pipes have an outer diameter of 19 and an inner diameter of 12, while the pump’s inlet has a nominal diameter of 40. What should be done? By the way, the pipeline must first be emptied, filled with water, and then kept in circulation
Great expert, I need your advice; I’m not very familiar with this area
What is the flow rate, and what is the total length of the pipeline?