why the pump suction pipe is larger than delivery pipe.what is exact reason ?
2007-04-07 08:39:08 · 5 answers · asked by Nilesh R 1 in Science & Mathematics ➔ Engineering
In many cases, a pump is not pressure fed, which limits the intake suction to 1 atmosphere (about 15 psi). Your flow through the pump will then be limited by how much you can draw into the pump - if you exceed 1 atm, then it cavitates (vacuum bubbles). To get the most flow through the pump, having a larger intake will allow more water to enter the pump without cavitation. Once pressurized by the pump, you can push it out as fast as you like because you are not limited to 1 atm pressure, and a smaller outlet pipe will do.
2007-04-07 16:51:45 · answer #1 · answered by eric.s 3 · 0⤊ 0⤋
The impeller pump cannot handle effectively a high suction pressure, It can however, handle large output pressures.
It has to do with the friction factor within the piping on the intake, so increasing that diameter will greatly reduce the frictional factor and "feed the intake" at a much reduced intake suction pressure at a much lower velocity. .
A larger pipe has a lesser velocity than a smaller pipe, thus the intake feed stock to the impeller has less suction pressure head than if a smaller pipe was used given that both the intake and output will have the same quantity of flow thru them in GPM .
The impeller pumps acts poorly on suction pressure but very effectively on discharge pressure, so that reducing the velocity and suction on the intake side is a necessary part of pumping efficiency.
No all pumps have a larger intake than the output. You can observe that in a Gear type pump, the intake is exactly equal to the output, and like wise in a piston pump, the intake of those types of pumps have output also equal to input.
2007-04-07 19:25:05 · answer #2 · answered by James M 6 · 0⤊ 0⤋
The intake of a pump is dependent on atmospheric pressure for the flow to happen regardless of what the output pressure is. Intake pipes are normally larger so that the suction of the pump is less likely to cause cavitation (vapor bubbles).
2007-04-07 16:06:08 · answer #3 · answered by Steve 7 · 0⤊ 0⤋
Sorry to tell you this, but it's "there" is a difference....and I believe it's so that there will be pressure at the delivery end, volume at the suctioning end.
2007-04-07 16:04:34 · answer #4 · answered by macjetsfan 3 · 0⤊ 0⤋
U can only pull 1 atmosphere vacuum and if u are not at sea level u cant do that.
2007-04-07 19:27:43 · answer #5 · answered by JOHNNIE B 7 · 0⤊ 0⤋