Specifications

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‐7‐
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C.2CHECKIMPELLERCLEARANCE
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Beforestartingthepumptheimpellerclearancemustbechecked.Thepumpefficiencyismaintained
whentheproperimpellerclearanceisset.Impellerfrontclearanceisfactorysettopredetermined
limits.
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Minimumvaluesfordifferenttemperaturesappearinthefollowi ngtable.Theimpellerclearance
adjustmentsarenecessarytopreventtheimpellerfromcontacting thecasingduetodifferential
expansionathigheroperatingtemperatures..
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IMPELLERCLEARANCESFORSERVICETEMPERATURE
S
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SERVICE
TEMPERATURE°F(°C)
MAGNATE 3575SX
inches(mm.)
MAGNATE 3575M&3575LX
inches(mm.)
MAGNATE 3575M&XLX
inches(mm.)
To200°F(93°C) 0.005”(0.13mm) 0.008”(0.20mm) 0.010”(0.26mm)
250°F(93°C‐121°C) 0.007”(0.18mm) 0.010”(0.26mm) 0.010”(0.26mm)
300°F(121°C‐149°C) 0.009”(0.23mm) 0.010”(0.26mm) 0.019”(0.48mm)
350°F(149°C‐177°C) 0.011”(0.28mm) 0.010”(0.26mm) 0.021”(0.53mm)
MODEL911S
.)
MODEL911My911LX
SECTIOND
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PUMPSTART‐UP
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D.1STARTINGPUMP
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1. Ensurethatsuctionvalveandanyrecirculationorcoolinglineshavebeenopened.
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2. Completelycloseorpartiallyopendischargevalveasdeterminedbysystemconditions.Never
opendischargevalvemorethan25%onstartup.
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3. Startdriver.Observepressuregauges.Stopdriverifdischarge pressureisnotattainedquickly.
Re‐primeandattempttorestart.
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4. Opendischargevalveslowlyuntilthedesiredflowisobtained.Ifnormallevelsofvibration,
bearingtemperatureandnoiseareexceeded,shutthepumpdownandresolvetheproblems.
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5. Topreventdamageresultingfromcavitationorrecirculationalwaysoperatethepumpator
neartheratedconditions.
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6. Ifthespecificgravityisgre aterthanoriginallyassumedortheratedflowrateisexceededthe
drivercouldoverload.Thefollowingtableshowsminimumrecommendedflows.
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7. Alwayschangecapacitybyregulatingthevalveinthedischargeline.Neverthrottleflow
fromthesuctionside,whichcancausecavitationandseriousdamagetothepump.