pump performance
pump performance
(OP)
Enclosed the snap shot of the suction piping arrangement of a centrifugal pump OH2 type. Pumping clear water...Our consultant is insisting to have a vortex breaker in the suction line...The pump rated flow is around 1100 m3/hr at 3 barg discharge pressure....Is this requirement is technically justified? Thanks to help with the criteria to provide a vortex breaker for such centrifugal pumps.





RE: pump performance
2. Why is the consultant spec. a breaker?
3.check with the pump manufacturer, some pumps already include a breaker in the inlet.
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.)
RE: pump performance
RE: pump performance
RE: pump performance
TenPenny: I don't see the submergence playing any part in the need for a "vortex breaker" in this installation - maybe the consultant is covering his arse, or doesn't know what he's doing or has come across problems with this particular pump previously.
Of course the way to solve these problem is to always ask the consultant "why" or for justification.
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.)
RE: pump performance
The pump manufacturer will be a better resource as to whether a vortex breaker is necessary. Note that the vortex breaker is relatively inexpensive.
RE: pump performance
Maybe the consultant is demanding a flow straightener, or as many in the HVAC market would call it, a suction diffuser. These are used on for installations such as a crowded mechanical room in a building with suction line dropping from ceiling and turning 90 degrees sharply into the suction inlet of the pump. MANY pump design engineers have questioned any benefit gained by these devices, but the manufacturers and the contractors who pad their bill like them a lot!
The pump manufacterer should definitely be asked their opinion.
I would absolutely have the consultant provide a technical justification for his demand. I would ask him to:
1. explain exactly what piece of equipment he is demanding, and what function it performs.
2. explain in detail what it is he sees in the system that requires needing this.
If he gives you some mularkey about swirling flow inside the pump causing cavitation or erosion, he either doesn't know what he's talking about, he's lazy, or he's on the take; possibly all three.
RE: pump performance
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.)
RE: pump performance
RE: pump performance
Ash Fenn
www.cdrpumps.co.uk
RE: pump performance
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.)