TUFFA TANKS 30000VBFS - Operation of the System; 7.6 Equipment Components: Flowmeter Installation & Calibration

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Pressurelosswithdieseloil Flowrate(l/min) 306090
Pressureloss(bar) 0.0050.20.4
Accuracyaftercalibration +/-1%
Repeatability (typical) +/-0.3%
Batchtotalreadout 3digitsheight18mm
Totaliserreadout 6digitsheight6mm
Readoutresolution 0.1litri
Connections (inlet/outlet) 1” BSP
Weight (approximate) 1.8Kg
Packagedimensions 185x185x170mm
Optionalfeatures RegistrationinUSgallonsfemale
threadedinlet/outlet1”NPT
1.3 INSTALLATION
TheK33canbeinstalledinanyposition,onrigidpipelines
orexiblehoses,directlyonpumpsortanks.Themeter
owdirectionisxedandindicatedbyanarrow.The
meterissuppliedinthestandardconguration(A).
Themeterandthecovercanberotatedby90°to90°
inrespecttothebodyinordertocarryoutthedi󰀨erent
congurationsshown(B,C,D).Theresetknobcanbe
installedeitherontherightsideorontheleftsideof
themeter.Inordertomodifythestandardconguration
followtheinstructionsgiveninsection“Disassembling
/Reassembling”.Themeterbodyisequippedwith4
blindholeswhichcanbethreaded(M5)forapossible
fastening.Ifsolidparticlesenterthemeasuringchamber
thecorrectworkingofthenutatingdiskmaybea󰀨ected.
Alwaysltertheuidbyinstallingalteronthemeterinlet
(recommendedlter400µ).
1.4 CALIBRATION
TheK33ispre-calibratedinfactorytobeusedwithDieseloil.Asspecicoperatingconditions
(suchasrealowrate,natureandtemperatureofthemeasureduid)maya󰀨ectthemeter
accuracy,are-calibrationshouldbecarriedoutaftertheinstallationhasbeencompleted.A
newcalibrationisnecessaryeachtimethemeterisdisassembledformaintenanceoperations
orwhenitisusedtomeasureuidsthatdi󰀨erfromDieseloil.
1.4 CALIBRATION PROCEDURE
1.Unscrewtheplug(seediagram1,pos.“14”).
7. OPERATION OF THE SYSTEM
2.Purgethesystem(pump,pipelines,meter)ofairbydispensinguntiltheowstreamisfull
andsteady.
3.Stoptheowbyshuttingo󰀨thenozzle,butletthepumprunning.
4.Resetthebatchregisterbymeansoftheresetknob(pos.“2”).
5.Dispenseattheowratewhichthebestaccuracyisrequiredat,byusingacalibration
containerhavingacapacitynotlowerthan20litres.Donotreducetheowinordertoreach
thegraduatedzoneofthecalibrationcontainer.Therightmethodistostartandstopthefull
owrepeatedlyuntiltherequiredllingisobtained.
6.Comparetheindicationofthecalibrationcontainer(realvalue)withtheoneofthemeter
(indicatedvalue).
-Iftheindicatedvalueishigherthantherealvalue,loosenthescrew(pos.“12”);
-Iftheindicatedvalueislowerthantherealvalue,tightenthescrew(pos.“12”).
7.Repeattheoperations4to6untilaccuracyissatisfactory.
8.Tightentheplug(pos.“14”)again.TheOringwhichthecalibrationscrewisprovidedwith,
hasthefunctiontoavoidaccidentallooseningoftheadjustmentscrewbutdoesnothaveany
sealingfunctions.Thereforeitisalwaysnecessarytoproperlyxtheplugwiththesealing
gasket(pos.“12”).
1.5 USE
AfterinstallationandcalibrationtheK33isreadytowork.Turntheresetknob(seediagram
1,pos.“12”)(clockwiseifitismountedontheleftofthemeterandanticlockwiseifitismounted
ontheright)untilthebatchregisteriscompletelyreset.Thetotalisercannotberesetinany
way.Makesurethatduringusepressuredoesnotexceedthevalueindicatedinsection
“Technicaldata”.
1.6 USE BY GRAVITY
K33canalsobeusedinfuelunitswhicharenotequippedwithpumpsandwheretheowis
generatedbythedi󰀨erenceinfuellevelbetweenthetankandthenozzleoutlet.Asareference,
asystemcomposedofatanko󰀨theground,withthemeterinstalledrightatthebottomofthe
tank,a3-mlong1’’exiblepipeandamanualnozzletypeSelf2000,guaranteesaowrate
ofapproximately30litres/minuteifthedi󰀨erenceinlevelishigherthan1.5metres.Longer
pipesornozzlesproducinghigherpressurelossesreducetheowinrespecttotheexisting
di󰀨erenceinlevel.Usebygravityisnotrecommendedwithdi󰀨erencesinlevellowerthan1
metre,astheconsequentreducedowratecausesthemetertoworkoutsideitsguaranteed
accuracyrange.Oneldcalibrationisalwaysadvisableincaseofgravityinstallations.
1.6 MAINTENANCE
NoordinarymaintenanceisrequiredprovidedthatthemeterK33isproperlyinstalledand
used.Anincorrectlteringonthemeterinletmayblockorwearoutthemeasuringchamber,
thusa󰀨ectingthemeteraccuracy.Shouldthisproblemoccur(seesection“Problem,Causes
andSolutions”)disassemblethemeasuringchamber,asshowninsection“Disassembling/
Reassembling”.
7. OPERATION OF THE SYSTEM