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Author Topic: gear pump  (Read 1264 times)
danno
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« on: March 02, 2010, 07:36:23 AM »

I picked up a kelly gear pump without a motor this weekend.  It is mounted on a heavy steel base plate.   Can anyone tell me what RPM I need to shoot for.  I see Kelly uses 1/2 or 3/4 HP but I dont know if they are 1750's or 3450RPM motors
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jdpro5010
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« Reply #1 on: March 02, 2010, 09:41:10 AM »

I don't know this for sure but I would think it would depend on your pulley size.  In other other word your drive ratios.  The smaller the pulley on the motor the slower it will turn the pump.  I think? grin
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nella
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« Reply #2 on: March 02, 2010, 11:05:02 AM »

If you look in the Mann Lake ltd. catalogue on page 90 there pictures of pumps and the motors they use 1750 rpm. motors. The rpms are reduced  by pulley size for each specific type pump.
http://www.mannlakeltd.com/m23Search/DisplayResults.asp?sIDSearch=73300
« Last Edit: March 02, 2010, 01:40:25 PM by nella » Logged
danno
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« Reply #3 on: March 02, 2010, 01:12:55 PM »

Thanks for the responses but this is not what I'm looking for.   The pump has a 9"pulley and the motor pulley is 11/2.    9 X 3.14= 28.26     1.5 X 3.14= 4.71
   28.26 div by 4.71= 6     1750RPM div by 6=291RPM @ the pump 
   3450RPM div by 6= 575RPM @ the pump

I understand the math but my question is what RPM do I need
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wd
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« Reply #4 on: March 02, 2010, 01:59:15 PM »

Is there a model number?
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rdy-b
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« Reply #5 on: March 02, 2010, 04:06:24 PM »

my pump is 1 inch gear pump-
I run 1750 RPM
pump runs about seven gallon a minute -when punping honey slow steady works best-(3/4 hp)-RDY-B
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fish_stix
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« Reply #6 on: March 02, 2010, 08:30:53 PM »

Get the 1750 rpm, 3/4 hp motor. I've never seen a honey pump that uses a higher speed. Try a pump shop for rebuilt motors.
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danno
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« Reply #7 on: March 03, 2010, 02:39:32 PM »

If any one is interested I found the answer to my question.   Optimal RPM at the pump is 300.   This can be done with motor speed and pulleys or deduction gears
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rdy-b
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« Reply #8 on: March 03, 2010, 04:07:45 PM »

what you need to remember is the amount of HP it will take to pump honey
HP=torque x RPM- RDY-B
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