Centrifugal Pump Troubleshooting

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1、CentrifugalPumpTroubleshootingYouhavefouropportunitiestotroubleshootcentrifugalpumpsandeachopportunitycanofferyouaclueastowhatiswrongwiththepump.Let'stakealookateachoftheseconditions:Thepumpishookeduptothepipinganditisrunning:·Youcanobserveleakagefromthestuffingboxorsomeotherarea.Thiswouldinclu

2、degaskets,bearingsealsandcracksorholesinthepiping.·Youcanhearanabnormalnoise.Youcanprobably"pinpoint"thesourceifyoutry.·Thereisevidenceofexcessiveheatinoneormoreofthecomponents.·Youcandetectexcessivevibrationeitherfromtheuseofinstrumentsoroneofyoursenses·Youcancheckifstuffingboxenvironmentalcon

3、trolsarehookedupproperly,andinmanycasestelliftheyarefunctioningcorrectly.·Youcancheckthepositionofcontrolandisolationvalvesthroughoutthesystem.Thisisespeciallyimportanttocheckwhilethepumpisrunning.·Iftherearemetersavailableyoucancheck:oFlowoPressureoPowerconsumptionoTemperatureoSpeed·Youcanesti

4、mateifthefoundationistooweak.Itshouldbefivetimesthemassofthehardwaresittingonit.Thepumpisstillhookeduptothepiping,butitisnotrunning.Youwillbepresentduringtheremovalprocess:·Youcancheckalignmentbetweenthepumpanddriver.·Duringtheremovalprocessyoucancheckforexcessivepipestrain.4/4·Youcancheckifthe

5、pipinghasbeeninstalledaccordingtogoodengineeringpractices.Thisisamajorfactorinmanycavitationproblems.Thepumphasbeentakenintotheworkshop,buthasnotyetbeendisassembledandyouwillbepresentatthedisassembly.·Youcancheckthesealinstallationdimension.·Youcanfeelifthereisrestrictedmovementofanyoftherotati

6、ngparts.·YoucanseeifthereisanyloosehardwareintheassemblyThepumphasbeendisassembled.Youwerenotpresent,butthepartsareavailableforyourinspection.·Youcanseeevidenceofwear,rubbingordiscolorationofthecomponents.·Youcanseeevidenceofcorrosion.·Youcanseeifanypartsaremissing.·Youcanseeifanymaterialorcoat

7、inghasattacheditsselftooneofthecomponents.Asanexample,calciumcanbuildupontheinsideofpipesandrestrictflow,ormagnetite(Fe304)builduponthesealcomponents.Inthispaperwewilladdressthelastcondition.Thepumphasbeendisassembled.Youwerenotpr