Pumps in parallel Header Size
Pumps in parallel Header Size
(OP)
I have a case of 3 centrifugal pumps connected in parallel .
the pump is 70 m head and 75 cubic meter per hour , the delivery line is 2" so is the main header >
when the pump starts the fluid comes out every valve gasket like a jet . i changed these gaskets many times and the problem remains .
when i deliver to a bypass to the atmosphere ( not in the very long main delivery line ) every thing seems to be fine . i guess the problem is in the design of the header as it can't withstand the pressure of the pump
i would like to know your recommendations about this
thanks alot
the pump is 70 m head and 75 cubic meter per hour , the delivery line is 2" so is the main header >
when the pump starts the fluid comes out every valve gasket like a jet . i changed these gaskets many times and the problem remains .
when i deliver to a bypass to the atmosphere ( not in the very long main delivery line ) every thing seems to be fine . i guess the problem is in the design of the header as it can't withstand the pressure of the pump
i would like to know your recommendations about this
thanks alot





RE: Pumps in parallel Header Size
A 2 inch header looks very small for that flow rate.
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RE: Pumps in parallel Header Size
i appreciate your nice reply
RE: Pumps in parallel Header Size
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: Pumps in parallel Header Size
Velocity though 2" pipe = 31 ft/s!!!!!! YIKES!
70 m = 99 psi
Sounds very unusual for water to be leaking through a valve gasket. I am not sure if you are talking about the valve flange gasket or the valve seat gasket. Even a 2" valve that you buy in a local hardware or plumbing store is pretty well rated for 125 - 150 psi.
You don't like to see the velocity anywhere in the piping to be greater than 10 ft/s. You will wear out the valve seats very quickly.
RE: Pumps in parallel Header Size
What we don't know/ Bachmann asked is what is the inlet pressure into the pump. ....
I think there nigh be a lot of issues worth this unknown system.
Remember - More details = better answers
Also: If you get a response it's polite to respond to it.
RE: Pumps in parallel Header Size
I think they have the answer.
RE: Pumps in parallel Header Size
Remember - More details = better answers
Also: If you get a response it's polite to respond to it.