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Electric motor size
- jonnydot
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6 years 4 months ago #2466
by jonnydot
Electric motor size was created by jonnydot
Hi guy's I mistakenly purchaced the wrong size pump but have decided to put it on an old tank I have.The pump specifies use with a 4hp(3Kw) 1300 rpm (max) motor but the closest I can find is a 4 Kw 1400rpm is this just a matter of pulley size on the motor for it to work? Thanks in advance for reading ...... Here is the Ebay link for the purchaced pump
cgi.ebay.com.au/ws/eBayISAPI.dll?ViewIte...ll&tid=1529734685014
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6 years 3 months ago #2553
by MTR-Admin
Replied by MTR-Admin on topic Electric motor size
Thanks for the post jonnydot,
I realize this is a very late reply but in case you still need the information, here you go.
Essentially yes, the horsepower of the motor basically dictates what size (OD) pulley you can use with the pump. A smaller kW (HP) motor will mean you'll have to use a smaller pulley, as it won't have enough torque to use a larger diameter pulley to turn the pump at the required RPM.
Obviously, a smaller pulley means lower RPM and lower CFM delivery, whereas a larger diameter pulley means higher RPM and CFM delivery.
It's a bit of trial and error in finding out what the max size pulley you can use with your pump; too large a pulley means the motor simply won't "push" the pump and will trip the breaker/overload switch.
I hope this helps, somewhat.
- MTR
I realize this is a very late reply but in case you still need the information, here you go.
Essentially yes, the horsepower of the motor basically dictates what size (OD) pulley you can use with the pump. A smaller kW (HP) motor will mean you'll have to use a smaller pulley, as it won't have enough torque to use a larger diameter pulley to turn the pump at the required RPM.
Obviously, a smaller pulley means lower RPM and lower CFM delivery, whereas a larger diameter pulley means higher RPM and CFM delivery.
It's a bit of trial and error in finding out what the max size pulley you can use with your pump; too large a pulley means the motor simply won't "push" the pump and will trip the breaker/overload switch.
I hope this helps, somewhat.
- MTR
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