understanding pumps
understanding pumps
(OP)
I occassionally design small water supply systems (less than 50 gpm). I would like to understand better the pros and cons of various types of pumps and generally the design process in pump selection. Can anyone suggest a good basic practical book?





RE: understanding pumps
http://www.pumps.org/
You might be able to find these books as used books on bookfinder.com.
RE: understanding pumps
For pumping from a well, submersible pump, whether oil free or non-oil free(rare, nowadays)would be the way the go.
For constant metering of fluid, peristalic pumpset with tubing being squeezed by a cam.
Progressive cavity pump would be for abrasive fluid such as sludge and lime but the problem of clogging would still persist if not periodically flushed.
Most pumpsets can be driven by VSD(variable speed drive) for coping with flow and pressure head.
RE: understanding pumps
But I would advise that in a network the flow rate is dictated by the demands (how much water people take). If you use a fixed speed pump there should really be a header tank so that the pumps can switch off when it's full. Dont pump into a closed pipe system with a fixed speed pump.
If no header tank, small variable speed pumps are now popular which vary speed to maintain constant discharge pressure over a range of demands. BUT for a very small network (4 l/s must be just a few properties)is is probably cheaper to install a fixed speed pump with a small accumulator vessel (pressure vessel with pre-charged bladder).
Tank or bladder vessel are sized to control starts per hour (not more than 12 starts per hour).
RE: understanding pumps
Contact a local pump sales representative ( Bell & Gossett, Armstrong, PACO etc.) They usually have some good pump selection guides and are usually willing to give you a short course in pump selection.
Regards
Bob
RE: understanding pumps
RE: understanding pumps
RE: understanding pumps