Looking for a Pump Curve
Looking for a Pump Curve
(OP)
I was given a part number by my field personnel and it is a bogus number. They did pull a pump operation point stamped on the pump, 1105 gpm at 130 ft of head. The electric motor is 50 hp running at 1775 rpm. Can I construct a pump curve from this data or select a similar pump curve? The system is pumping chilled water through a building and my analysis says that the piping system needs to be redesigned.





RE: Looking for a Pump Curve
Maybe you could get a rough idea of a pump curve, BUT
Can you tell us the Manufacturer, model number ...
type of pump, inlet diameter, outlet diameter, IMPELLER size?
or at least post a picture?
Heck give us something to go on! We're really good, but definitely not magicians.
**********************
"Being GREEN isn't easy" ..Kermit
http://www.youtube.com/watch?v=hpiIWMWWVco
http://virtualpipeline.spaces.live.com/
RE: Looking for a Pump Curve
The piping in the mechanical room is 8" diameter. The pressure drop across the pump is 40 psig. All of the pumps and flanges are covered with insulation. I can't take a camera into this building.
RE: Looking for a Pump Curve
Start at (Q,H)= 1.25 * 130 and sketch a parabolic curve kinda flat at Q=0 then curving down from from there through your (1105,130) point.
Now face east, pray a lot and keep your fingers crossed.
**********************
"Being GREEN isn't easy" ..Kermit
http://www.youtube.com/watch?v=hpiIWMWWVco
http://virtualpipeline.spaces.live.com/
RE: Looking for a Pump Curve
RE: Looking for a Pump Curve
**********************
"Being GREEN isn't easy" ..Kermit
http://www.youtube.com/watch?v=hpiIWMWWVco
http://virtualpipeline.spaces.live.com/
RE: Looking for a Pump Curve
RE: Looking for a Pump Curve
1150 gpm at 130....I get 36.3 liquid hp
Allowing for 0.7 efficency (and a little bit for the seal etc) I get about 53-55 bhp required.
The 75 hp motor seems about right.
Can you identify the pump vendor from the casing ?
Find the local pump vendor rep ask him questions (he probably knows all about this particular pump)
Otherwise get a pump curve from the equivalent configuration from a competitor and use that. You cant be too far off....
-MJC
RE: Looking for a Pump Curve
Did you know that 76.4% of all statistics are made up...
RE: Looking for a Pump Curve
RE: Looking for a Pump Curve
"We have a leadership style that is too directive and doesn't listen sufficiently well. The top of the organisation doesn't listen sufficiently to what the bottom is saying." Tony Hayward CEO, BP
**********************
"Being GREEN isn't easy" ..Kermit
http://www.youtube.com/watch?v=hpiIWMWWVco
http://vir