Arrangement of eccentric reducer and elbow at the pump inlet
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I have a question: when there is an eccentric reducer at the pump inlet, followed by a 90-degree elbow that connects directly to the pump inlet, should the alignment be done with the top levels or the bottoms aligned? I looked up some information, and everything mentioned a flat bottom combined with a 90-degree elbow; I still don’t understand why using a flat top wouldn’t help reduce the formation of air pockets Please give some advice.
Could you please explain it in more detail? Thank you!
The suction side is level at the top, while the backflow side is generally level at the bottom
Thank you for the advice. I’m not very clever – what’s the advantage of having a flat bottom when pouring backwards? I haven’t figured it out yet; please give me some guidance, teacher
For details, refer to HG/T 20549.5-1998 Specifications for the Design of Pipeline Layout in Chemical Plants
This post was last edited by Liushui Zhiyun shine on 2020-7-2 at 17:01. For details, refer to HG/T 20549.5-1998 Regulations for the Design of Pipeline Layout in Chemical Plants, and SH3012-2011, which stipulates requirements for level alignment regarding process media.
The approach in the early days was to adhere to the aforementioned regulations. Improvements have been made in recent years: a flat top is used for both upward and downward movements, but drainage measures are implemented at the areas where fluid accumulates at the bottom.
Agreed; generally, it’s now a flat top + tight packing
Thank you to all the teachers for their advice. I would like to ask further questions: some materials I’ve consulted mention that in arrangements like the one in the picture, with a flat base and squares representing the pump inlets, what are the advantages of this approach? Thank you!