How to reduce flow rate?
How to reduce flow rate?
(OP)
What is a common way to reduce the flow rate and increase the back pressure on a pump driven by an electric motor? Are flow rate limiting valves a good choice or are there better methods to use? Flow rates in the pipe of aprox. 8 USGPM, 50 psi to 60 psi. If more specific information is needed, let me know. Thanks,





RE: How to reduce flow rate?
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"Pumping systems account for nearly 20% of the world's energy used by electric motors and 25% to 50% of the total electrical energy usage in certain industrial facilities." - DOE statistic (Note: Make that 99.99% for pipeline companies) http://virtualpipeline.spaces.live.com/
RE: How to reduce flow rate?
With any kind of pump, reducing the shaft speed or the size of the pump will reduce the flow without increasing the pressure, and waste less energy, at higher upfront cost.
Mike Halloran
Pembroke Pines, FL, USA
RE: How to reduce flow rate?
RE: How to reduce flow rate?
RE: How to reduce flow rate?
RE: How to reduce flow rate?
RE: How to reduce flow rate?
RE: How to reduce flow rate?
Via telepathy, I guess.
Mike Halloran
Pembroke Pines, FL, USA
RE: How to reduce flow rate?
RE: How to reduce flow rate?
The best way is to reduce the impeller diameter - this will reduce flow and also reduce the power requirement.
RE: How to reduce flow rate?
**********************
"Pumping systems account for nearly 20% of the world's energy used by electric motors and 25% to 50% of the total electrical energy usage in certain industrial facilities." - DOE statistic (Note: Make that 99.99% for pipeline companies) http://virtualpipeline.spaces.live.com/
RE: How to reduce flow rate?
RE: How to reduce flow rate?
Opps. Did you like my Birmingham accent?
When I was in the train station they kept asking me if I needed 'elp? I couldn't figure out who/what "elp" was. I wanted to go to John Brown's office in Sheffield. I kept looking at 'im asking "what"... probably 3 times before I figgured it out.
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"Pumping systems account for nearly 20% of the world's energy used by electric motors and 25% to 50% of the total electrical energy usage in certain industrial facilities." - DOE statistic (Note: Make that 99.99% for pipeline companies) http://virtualpipeline.spaces.live.com/
RE: How to reduce flow rate?
RE: How to reduce flow rate?
**********************
"Pumping systems account for nearly 20% of the world's energy used by electric motors and 25% to 50% of the total electrical energy usage in certain industrial facilities." - DOE statistic (Note: Make that 99.99% for pipeline companies) http://virtualpipeline.spaces.live.com/
RE: How to reduce flow rate?
RE: How to reduce flow rate?
RE: How to reduce flow rate?
Inspection of your other questions suggests it is at least equally likely that you are pumping heavy oil with, e.g. a screw pump, in which case restricting the pump discharge is a REALLY bad idea.
You seem also to be reporting some layman's conclusions as data, and/or are a little fuzzy on those electric motor things and those pump things.
Why don't you start over, and describe:
- the piping topology
- what fluid you're pumping under what conditions
- what _exact_ pump you're using
- what exact motor is driving the pump
- what you have measured
- what YOU, PERSONALLY have measured
- why you think increased pipe pressure is a good thing
- what exact problem you are trying to solve
Mike Halloran
Pembroke Pines, FL, USA
RE: How to reduce flow rate?
How many times must we engage into "twenty questions" with the newbie who doesn't understand the fundamentals of centrifugal pump runout and the real need for a reasonable motor service factor..?
I am so sick of those who demand immediate answers from strangers...
-MJC
RE: How to reduce flow rate?
RE: How to reduce flow rate?
**********************
"Pumping systems account for nearly 20% of the world's energy used by electric motors and 25% to 50% of the total electrical energy usage in certain industrial facilities." - DOE statistic (Note: Make that 99.99% for pipeline companies) http://virtualpipeline.spaces.live.com/
RE: How to reduce flow rate?