hydraulic separation walls
hydraulic separation walls
(OP)
I have a questions regarding water pump station design. I have a 25' diameter pump station with 3 submersible pumps.
On rectangular pump stations that I have seen, there are divider walls/hydraulic separation walls between the pumps, I'm assuming to avoid cavitation type issues. Are these required for a circular pump station? Is there some sort of minimum distance between the pumps that I need to have to avoid needing those walls?
I have the NHI "Highway Stormwater Pump Station Design" Cirular #24. They talk about separation walls for rectangular pump station, but nothing for circular ones.
Any further input/design references would be appreciated. Thanks.
On rectangular pump stations that I have seen, there are divider walls/hydraulic separation walls between the pumps, I'm assuming to avoid cavitation type issues. Are these required for a circular pump station? Is there some sort of minimum distance between the pumps that I need to have to avoid needing those walls?
I have the NHI "Highway Stormwater Pump Station Design" Cirular #24. They talk about separation walls for rectangular pump station, but nothing for circular ones.
Any further input/design references would be appreciated. Thanks.





RE: hydraulic separation walls
http://virtualpipeline.spaces.msn.com
RE: hydraulic separation walls
They are also likely to form floor vorticies under the pumps, which will damage the pumps, particularly the seals and possibly the bearings.
What you want to achieve is a uniform flow to the pumps. A baffle wall at the inlet to slow the flow down and distribute it across the sump will help, as will side walls around each pump intake.
For a sump of this size, I would seriously consider having it hydraulically modelled. This will be able to show that it will be able to transport grit and scum through the pumping station with no build up and that the conditions for the pumps are adequate.
Alterantively, get a copy of the Flgyt design manual for submersible pump sumps and follow the guidance in there. The manuals were based on hydraulic testing and are excellent.
RE: hydraulic separation walls
http://virtualpipeline.spaces.msn.com
RE: hydraulic separation walls
This should help with the flow, but I still wonder about having the walls. Any direct links to the Flygt design manual - I couldn't find it on their web page. Thanks.
RE: hydraulic separation walls
design recommendations for pump stations with large centrifugal wastewater pumps
http://www.flygt.co.uk/26267.asp