total system head-transfer pump

[moideen]

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

 

[Artisi]

What is stamped onto the pump data plate - it would help to list it for everyone to see.
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.)

 

[LittleInch]

"checked with its name plate on goggle , no any details"

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/ProductLiterature/Pumps/71559945-e.pdf

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.