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Basic Question
3

Basic Question

Basic Question

(OP)
Hi all,

I'm new and have some basic questions which I would appreciate if some people could answer.
How would I be able to tell a centrifugal, reciprocating, or rotary pump from each other?
Also, what are basic differences and applications of each?
Thank you!

RE: Basic Question

I would say:

Atted a class at a recognised college/univerisity and get some basic knwoledge of unit operation.

You may also like to check:

http://www.pumpuniversity.com/

Best regards

Morten

RE: Basic Question

head for the localy libary and borrow a book on pumps, it's marvelous what a bit of self study can do for you.

Naresuan University
Phitsanulok
Thailand

RE: Basic Question

www.bumicahayaunggul.com.
It is a local rep, but good enough to make a brief answer of what u r asking
Thx

RE: Basic Question

1.  Their external appearances differ.
2.  Their behaviors differ:
- A rotary pump, of which there are dozens of subtypes, behaves like a constant current source.
- A reciprocating pump behaves like a constant current square wave source, e.g. a charge pump.  Multicylinder recips behave like a polyphase charge pump.
- A centrifugal pump, of which there are several subtypes, behaves like a constant voltage source at low flows, and like a constant current source at low pressures.  In between, where its best efficiency lies, it sort of transitions between the asymptotes.

All are parametrically linear in flow with shaft speed, to a first approximation.

In general,
- Rotary pumps are used at modest pressures, where uniform flow is an important characteristic.
- Recips are used to develop high pressures.  Their output has a lot of 'AC' in it.
- Centrifugals are used where a compliant source can be tolerated or is a good thing.  They are generally cheap, durable, and dirt- tolerant.


Mike Halloran
NOT speaking for
DeAngelo Marine Exhaust Inc.
Ft. Lauderdale, FL, USA

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