Radial Thrust vs. Flowrate or Volute Diameter
Radial Thrust vs. Flowrate or Volute Diameter
(OP)
I realize that there are many, many geometries of pumps and volutes so a general or rule-of-thumb type white paper may not exist for what I'm looking for.
Has anyone seen some type of graph or chart that shows how radial thrusts increase with either increasing flow rate or increasing volute diameter in a general way?
Another general type graph that would be helpful is radial thrust vs. bearing life. In other words, as radial thrusts increase, at what point does it really start to matter?
Has anyone seen some type of graph or chart that shows how radial thrusts increase with either increasing flow rate or increasing volute diameter in a general way?
Another general type graph that would be helpful is radial thrust vs. bearing life. In other words, as radial thrusts increase, at what point does it really start to matter?





RE: Radial Thrust vs. Flowrate or Volute Diameter
A good starting point - http://www.mcnallyinstitute.com/13-html/13-02.htm
RE: Radial Thrust vs. Flowrate or Volute Diameter
RE: Radial Thrust vs. Flowrate or Volute Diameter
A very rough rule is, do not operate below 80% of BEP flow or more than 120% - however, this rule is broken everyday and usually without any major concerns or problems.
Pump selection should be based on sound engineering considerations which includes many factors not just radial thrust.
RE: Radial Thrust vs. Flowrate or Volute Diameter
It certainly does include flowrate. Look at the term K then look at what the Q values represent.
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"Pumping accounts for 20% of the world's energy used by electric motors and 25-50% of the total electrical energy usage in certain industrial facilities."-DOE statistic (Note: Make that 99% for pipeline companies) http://virtualpipeline.spaces.live.com/
RE: Radial Thrust vs. Flowrate or Volute Diameter
http://www.pump-zone.com/articles/22.pdf
http://www.pump-zone.com/articles/15.pdf
Is it standard terminology to use the term "radial thrust"? I realize there are radial and axial forces. I always thought the term "thrust" was reserved for axial..apparenlty not?
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RE: Radial Thrust vs. Flowrate or Volute Diameter
Here's the reliability chart, attached.
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"Pumping accounts for 20% of the world's energy used by electric motors and 25-50% of the total electrical energy usage in certain industrial facilities."-DOE statistic (Note: Make that 99% for pipeline companies) http://virtualpipeline.spaces.live.com/
RE: Radial Thrust vs. Flowrate or Volute Diameter
Thank you both for the information. It was very helpful!