TUFFA TANKS 30000VBFS - Operation of the System; 7.6 Equipment Components: Flowmeter Use & Maintenance; 7.7 Meter Disassembly & Troubleshooting

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7. OPERATION OF THE SYSTEM
WARNING:
Before disassembling alwaysmake sure that all uid is drained from the meter and pipes connected to it.
Necessarycleaningcanbecarriedoutbymeansofasoftbrushorsmalltool(i.e.ascrewdriver).
Duringcleaningbecarefulnottodamagethechamberorthedisk.Carefullycheckthemeterand
replacethepartswhichhavesu󰀨eredanypossibledamage.Onlyusetheoriginalsparepartkits
shownindiagram1“Explodedviewandsparepartlist”.Anewcalibrationisalwaysnecessary
aftercleaningorreplacingthemeterparts.3)Themeterresetsthepresenttotalalready.
1.7DISASSEMBLINGREASSEMBLING
K33canbeeasilydisassembledintoitsmainpartswithoutremovingthebodyfromthepipes.
1.8METERUNIT
Todisassemblethemeterunitoperateasfollows:
a.Removetheresetknobbyrmlypullingitaxially.
b.Loosenthe4retainingscrews(seediagram1,pos.“7”).
c.Loosenthe2screws(pos.“5”).
Toreassembletheunitreversetheproceduredescribedabove.
1.9RESETKNOB
Tomodifytheresetknobposition:
a.Performonlytheoperationsa)andb)describedabove.
b.Takeouttheplug(seediagram1,pos.“4”)bypushingitfromtheinsidetowardstheoutsideof
thecover.
c.Fixagaintheplugontheoppositeholebyplacingitinsidethecoverandpushingitoutwards.
d.Fixagainthemetercoverandresetknob.
1.10MEASURINGCHAMBER
Toenterthemeasuringchamberoperateasfollows:
a.Disassemblethemeterunit.
b.Loosentheeightscrews(seediagram1,pos.“7”).
c.Removethebodycover(pos.“8”)togetherwiththegearunit.Duringthisoperationbecareful
nottodamagethegasket(pos.“10”).
d.Removethewholemeasuringchamber(pos.“11”)byliftingitfromthemeterbodyandatthe
sametimepullingitbacktowardstheinletinordertoremovetheOring(pos.“16”)fromitsseat
attheoutlet.Tochecktheinsideofthemeasuringchamber(pos.“15”),removetheOringand
dividethetwohalfchamberscontainingthenutatingdisk.Measuringchamber.
Toenterthemeasuringchamberoperateasfollows:
a.Disassemblethemeterunit.
7. OPERATION OF THE SYSTEM
b.Loosentheeightscrews(seediagram1,pos.“7”).
c.Removethebodycover(pos.“8”)togetherwiththegearunit.Duringthisoperationbecareful
nottodamagethegasket(pos.“10”).
d.Removethewholemeasuringchamber(pos.“11”)byliftingitfromthemeterbodyandatthe
sametimepullingitbacktowardstheinletinordertoremovetheOring(pos.“16”)fromitsseat
attheoutlet.Tochecktheinsideofthemeasuringchamber(pos.“15”),removetheOringand
dividethetwohalfchamberscontainingthenutatingdisk.
1.11GEARUNIT
Toreachthegearunitcomponents:
a.Removethecover.
b.Loosenthescrews.
c.Removetheplate.Nowallgearscanbereachedforinspection.Shouldthegasketbereplaced,
removethebevelgearfromtheshaftbypullingaxially,thenremovethegeartogetherwith
theshaft.Thegasketreplacementalwaysrequiresthereplacementofthebushprovidedwith
thesparepartkit.Toreassemblereversetheabovedescribedprocedurepayingparticular
attentionto:
•LubricatetheOringbeforeinstallation.
•Checkthatthegearunitcanrotatefreelybeforexingthecover
1.12PROBLEMS,CAUSESANDSOLUTIONS
Problem Possible cause Corrective action
Leakfromthe
shaftgasket
-Damagedgasket Remove(seesection“Gearunit”)
andreplacetheOringandthebush
Insu󰀩cient
accuracy
-Wrongcalibration Repeatcalibrationfollowingtheinstructions
insection“Measuringchamber”
-Soiledorblockedmeasuringchamber Cleanthemeasuringchamberfollowingthe
instructionsinsection“Meterunit”
-Airintheuid Locateandeliminateleaksininletlines
Reducedowrate -Cloggedorblockedmeasuringchamber Cleanthemeasuringchamberfollowingthe
instructionsinsection“Measuringchamber”
-Blockedorsoiledlter Cleanthelter