Pulley Selection Guide - General Pump

1 GENERALPUMPA memberoftheInterpumpGroupPulleySelection GuideGen era l Pumpis a memberofth e Inte rpump Gro up1. Lo cate pumpRPMand hor sep owerrequiredfor the desi red flow rat e (GPM)and pressure (PSI)on theapp ropri ate pump It is importantthat motor pulleyis of sufficient di am eter and the bel t of sufficientsectionto transmitthe requiredhorsepowerto the pum p. Therefore,fr om the li st below,fi nd the motorpulley sizenecessaryto tran smit thehorsepoweryou chosefro m the PUL LEY Guide A SEC TIO N BEL T B SECTIONBELT C SECTIONBELT**TOTR ANSMIT:1 BELTS ingleGro ovePul ley2 BELTSDou bleGroovePulley1 BELTS ingleGr oovePulley2 BELTSD oubleGro ovePulley1 BELTS ingleGroovePull eyHORSEPOWER12-1/2 DIA----1-1/23----23-1/4----33-3/43 DIA4-14 DIA3- 1/2 DIA-55-1/43-1/255-7-1/2-4-1/46--10-5-1/4 858 DIA15-7106920-9-710** In ot her words,if the pumpperformancecurvestatesthat you need7-1/2HP for your desi red GPMandPSI, then readingto the right of the 7-1/2HP, you will find the minimummotorpulleysize whi ch in this caseis4-1/2 in diameter if you use a doub le-groovepul ley with two A sectionbeltsor 6 if you use a single-groovepulleywi th one B sectionbe lt.

2 3. Nowgo to the Pum p Pull ey SpeedGuidefor 1725 RPMM otors (if not usi ng 1725motor, go to #5) and underdiam et er previouslychosen for the motorpulley,find the col umn to the left of theRPMis the proper pumppu ll ey dia easenote that if you cannotfind the pr operRPM,you can useany motor pulleydiameterlargerth an the minimum diameteryou just PPUUMMPP 1174 Northla nd Drive Mendota Heights, MN 55120 Phone: (651)454-6500 Fax: (651)454-4524 e-mail: 0586 -084. Be lt length can be calcul at ed by using the following formul 7 x (Motor Pulley Diameter + Pump Pulley Diameter) + ( 2 x Shaft Spacing) - 3 = Belt LengthAB CEXAMPLE:You have an application usin g a TS1021 pump (see spec sheet) to pump 4 GPM at 1500 PSI.

3 You need to know whatbelts and pulleys to use and how m uch more horsepower i t wi ll the pump spec sheet application graph, locate GPM on the horizontal scale and 1500 PSI on thevertical scale. As you can see, the lines cross in the 5 HP area for electric motors (double for gas engine).Follow the vert ica l GPM line down to the diagonal line in the lower chart, then left to 1036 RPM forthe required pump w t hat you know the pump must be driven at 1036 RPM with a 5 H P motor, go to the Moto r Pulley Guide . Th ere are four Pulley columns to the right of 5 HP. You can use any of the four (for this example,we will use a do uble-groove 3- 1/2 with A section belt Pulley ) . w g o t o the Pul ley Spee d Guidefor 1725 HP motors.

4 In the col umn marked motor pull ey outsidediameter, locate 3-1/2 , and read dow n until you need a 5-3/4 pump Pulley for your applicati on. Pleasenote th e motor Pulley sizes ar e the mini mum; lar ger ones may be used in order to obtain the correct order to determine belt length, find the center distance between shafts (assume in this case it is 8 ) andapply the f ormula shown in step Lengt h = 1. 57 ( + 9) + (2 x 18) - 3 Therefore, you would use a double-groove 4-1/2 ODBelt Lengt h = 2. 12 + 36 - 3motor Pulley and double-groove 9 OD pump Pulley withBelt Lengt h = 54 .2tw o 54 inch A section you do not have a 1725 RPM m otor, you can use the following formula to determine the pump Pulley diameteronce you have found the proper motor Pulley diameter in Step 2:Motor Pulley Diameter x Motor R PM = Pump Pulley Diameter x Pump RPME xample:If yo u know from Step 2 above that you need a minimum m oto r pull ey diameter of and thatthe pump RPM must be 1036 and your motor is 1200 RPM , you can use the follow ing formula to determinethe pump p ulle y di ameter:Motor RPM x Motor Pulley Diameter = Pump RPM x Pump Pulley Diameter12 00 x 1036 x Pump Pulley Diam eter42 00= 1036 x Pump Pulley Diam eter42 00 / 1036= 4 Pump Pulley Di ameter