how many gpms can be attained from a 5 HP single phase 115 volt electric/hydraulic pump unit @ 4000PSI ?
2007-06-29 02:13:34 · 5 answers · asked by James M 1 in Science & Mathematics ➔ Engineering
More information would be needed.
Type of pump and RPM would help.
5HP motors are not available in single phase or at that voltage are you sure on motor type?
2007-06-29 03:23:34 · answer #1 · answered by Anonymous · 0⤊ 0⤋
We will have to make some assumptions to estimate the flow.
The basic equation for the brake horsepower of a pump is: BHP = GPM x TDH x S.G. / ( 39.6 x % Efficiency )
The nominal motor size (5) will be a little larger than the actual required power so use 4 BHP
A small pump will have a low efficiency if centrifugal, but this pump, because of the pressure and horsepower is probably a positive displacement pump possibly like a gear pump. Estimate 80% efficiency.
The TDH will be 6000 x 2.31 for feet of fluid being pumped (whatever it is)
If the fluid is water the S.G is 1.0. If the fluid is oil use approx. 0.8
Plug in the numbers and do the math.
The electrical characterics of the motor are not involved in this particular calculation. You would want to check the motor amps compared to the circuit breaker rating.
To prevent stalling the motor and possible burnng it up- you will need a pressure bypass around the gear pump in the event of a closed valve in hydraulics.
2007-06-29 16:04:51 · answer #2 · answered by Bomba 7 · 0⤊ 0⤋
The answer of 1.61 gpm is correct if it's a centrifugal pump. If it's a positive displacement pump (and at this pressure it probably is), then you are looking at a lot less flow. That flow would depend greatly on the specific pump technology, but it would probably be top out at about 20 gph.
By the way, here's a link for a 5 hp single phase motor by Baldor although none of them are 115V.
http://www.baldor.com/products/product.asp?1=1&product=AC+Motors&family=All+Families%7Ctbl%5FACMotors&phase=1&hp=5%2E00
2007-07-03 02:50:49 · answer #3 · answered by vogted 1 · 0⤊ 0⤋
1.61 gpm assuming an efficiency of 75%.
GPM = HP x efficiency x 1714 /psi
A 5 HP 115 VAC motor? Really?
2007-06-29 21:20:26 · answer #4 · answered by gatorbait 7 · 0⤊ 0⤋
I would pick the answer off the manufacturer's pressure-flow diagram.
For a rough estimate you could do a work in work out with some guess at efficiencies.
2007-06-29 09:27:13 · answer #5 · answered by ? 5 · 0⤊ 0⤋