total system head-transfer pump
total system head-transfer pump
(OP)
I am planning to replace my exiting transfer pump with new. I got proposal from my contractor with lowara pump maximum head 393ft (12mtr).pump placed on basement 2 and building floor height 15 floor. no data I have about the existing pump, checked with its name plate on goggle , no any details. So I calculated that
Static head will be 204 ft.
Friction approximate including discharge and suction pipe=60ft
Total 260 ft, so can be reduce 100 feet from the proposed unit. Am I correct in calculation?
exiting pump name plate

motor name plate

Static head will be 204 ft.
Friction approximate including discharge and suction pipe=60ft
Total 260 ft, so can be reduce 100 feet from the proposed unit. Am I correct in calculation?
exiting pump name plate

motor name plate






RE: total system head-transfer pump
An alternate suggestion is to you employ someone who understand pumping equipment, systems and installations - think it will save you and everyone else a lot of time and effort.
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: total system head-transfer pump
Then you're looking in the wrong place / wrong words.
This is a dresser pump, now "flow-serv".
This is the manual http://www.flowserve.com/files/Files/Literature/Pr...
your pump, a 65-40-250L has its own pump curve, but typically (page 15 as you've got a 50htz, 2pole pole motor) is putting out around 300ft of head at a flow of around 250 USgpm.
There is a barely legible serial number - PHONE dresser up and ask someone for a copy of your pump data sheet using the serial number - they often keep these for perpetuity.
The flow and head figures appear absent or have been removed.
If your pump is / was providing enough flow and pressure then 393ft seems a little high, but needs to be matched for flow and pressure. Remember you always need about 1bar at the end point, not zero and in a building your friction calc is probably not accurate.
So in theory if all you are doing is pumping water to a roof tank then about 300ft looks good to me, but you need to match flow and pressure.
I would get someone who knows what they are doing to check anything before you buy it.
Remember - More details = better answers
Also: If you get a response it's polite to respond to it.