Advice on Pump Suction Line

[relaxjack]

Hi guys. Can any pump expert tell me what will be the implication of having a suction line like the one shown in attachment? Thank you.

 

[Artisi]

Possibly air trapped in the top of the pipe reducing efgective diameter and increasing inlet losses.

It is a capital mistake to theorise before one has data. Insensibly one begins to twist facts to suit theories, instead of theories to suit facts. (Sherlock Holmes - A Scandal in Bohemia.)

 

[GeorgeMech]

For sure it will cause an air entrapment at the highest point, so better to put air release valve at the offset point.

 

[LittleInch]

Ode echo the others, but depends on flow velocity. Anything above about 2m/sec should be ok to entrain any air, but less than that might cause problems. Upstream section will never drain and if you've got any particles or heavy sediment it will build up in the upstream side of the hump.

If you can maintain the height of the hump on the upstream side and if you haven't got enough velocity then add a vent valve.

My motto: Learn something new every day

Also: There's usually a good reason why everyone does it that way

 

[relaxjack]

Thank you all for reply.