How we create value

• Customdesignreducesinstallationcosts

• Highqualityengineering suitedtothemost demandingapplications

• Highlyreliable,reducingmaintenancerequirements

• Designmodelsanticipate fieldperformance

• Ovivoexperienceindebrisfilterapplicationsacrossawiderangeofindustries

Keyfeatures&benefits

• Compactdesignsuitablefornewinstallationsorretrofit

• Lowpressuredrop

• Externaldrivemechanismwitheasyaccesstosealsandgearbox

• Suitableforhighflowsandavarietyoffiltrationsizes

• Suitableforhighdebrisloadingandcontinuousoperation

• Suitableforoperationeitherupstream(negativeoperatingpressure)ordownstream(positiveoperatingpressure)oftheintakepump

• CanbemanufacturedtoASME,NuclearandPower&PetrochemicalIndustrycodesandstandards

Brackett Green® Debris FiltersContinuousonlinecondenserandheatexchangerprotection

Brackett Green® Debris Filters

Mostpowerplantsemployextensivepre-screeningatcoolingwaterintakes.Despitethis,additionalfiltrationcanberequiredatlocationswherethecoolingwaterisloadedwithheavydebrisandmarinelife.BrackettGreen®debrisfiltersprovideavitallineofdefense,efficientlyinterceptingandremovingcoarseparticles,fibrousmaterial,mussels,clamsandothermacrofoulingrelatedtoproblemsdownstreamofpumps.

Ovivounderstandstheimportanceofthethermalperformanceofyourplanttoensureplantoutput,andultimately,profitability.Online,self-flushingBrackettGreendebrisfiltersareaneffectivesolutiontominimizefoulingfromthecondensertubes.Thislastlineofdefenseforyourcoolingwatersystemcanincreaseormaintainyourcondenser’sheatexchangeratebykeepingthetubesclean,reducingoperatingcostsandultimately,yourenvironmentalfootprint.

Prevents macro foulingBuilt-updebrisattheheatexchangerinletandcondensertubescanstoporslowcoolingwaterflow.Thisreducestheheattransferrateanddamagesoverallplantefficiency.Debrisbuild-upalsoshortenstubeservicelifethroughcorrosion,erosionandpitting.

Automaticdebrisfilteringpreventsmacrofoulingofheatexchangersandcondensers,lengtheningservicelifeandeliminatinganarrayofpotentialperformanceproblems.Theseinclude:insufficientcooling,ineffectivetemperaturecontrol,increasedpressuredrops,highenergyconsumptionandcostlydowntime.

Compact design handles all debrisOrdinaryself-flushingdebrisfiltersareinstalledexternallytothecoolingwaterline,demandingalargeamountofspaceandadditionalpipework.Somearedesignedtohandlecoarsedebriswhileothersaremoresuitableforfibrousdebrisremoval.Ovivo’suniqueBrackettGreenautomatic,self-flushingdebrisfiltersfitwithinthecoolingwaterpipingandcanhandleallformsofdebris.

TheBrackettGreendebrisfilter’shousingactuallyreplacesasegmentofthecoolingwaterpipework,requiringnoadditionalspaceorconnections.Thefiltrationmechanismisdesignedtoremovecoarseaswellasfibrousdebrisincludingplastic,mussels,clams,fish,treeroots,seaweed,algae,rocks,woodchips,pineconesandleaves.

Optimum performance for minimal costTheBrackettGreendebrisfilter’suniquedesignprovidesmaximumdebrisremovalatthelowestoperatingandmaintenancecost.OvivoBrackettGreendebrisfilterincorporatesaarrayofhighefficiencyfeatures,including:

• Lowoperatingpressuredropacrossthedebrisfilter• Maximumdebrisremovalforminimumflush waterdischarge

• Noexternalwaterrequiredforflushing• Noexternalpumprequiredforflushing

Condensertubeswithoutdebrisfilter

Insidedebrisfilterpriortocleaningcycle

Tubeconditionwithdebrisfilter

Beforeinstallationofdebrisfilter

Debrisfilterinstalled

BrackettGreendebrisfilterscontinuouslyandautomaticallyremovesuspendedsolidsfromcoolingwaterthatmightotherwiseclogtheheatexchangerandcondensertubes.

1.InletwaterenterstheBrackettGreendebrisfilterscreeningelement.Varioustypesofdebris(includingcoarseandfibrousdebris)arecollectedoverthefilterscreeningelement.Screenelementsareavailableinavarietyofshapesandsizes(round,slot,orsquare).

2.Auniquelyengineeredrotorwithseveralsuctionpartsishousedwithinthefilter.Therotorisdesignedforhighvolumedebrisremovalofalltypesandsizes,withtheminimumofcoolingwaterdischargedaswaste.Therotorisoperatedbyanelectricmotor.

3.Asdebrisaccumulates,differentialpressureacrossthescreenismonitored.Ifthepressuredropsbelownormal,therotorbeginstorotatewhiledebrisdischargeisopenedtoalowerpressuredischargepoint.Sincethepressureinsidethedebrisfilterhousingishigherthanthatatthedebrisdischargepoint,thepressureonthecleansideoftheelementwillpushdebrisintotherotorevacuationchamberwhiletherotoristurning.Debrisisvacuumedoffthefilterelement.

4.Oncethefilterelementiscleaned,therotorwillstopandthedebrisdischargevalvewillclose.

HowitWorks

a-Rotordrive

b-Filterelement

c-Debrisdischarge

d-Filterhousing

e-Differentialpressuretransmitter

c

e

b

d

a

CondenserProtectionSystem

Ovivounderstandstheimportanceofthethermalperformanceofyourplantwhichresultsinplantoutputandultimatelyinprofitability.Theuseofboththe OnlineSelfFlushingDebrisFiltersandOnlineAutomaticTubeCleaningSystemsisthemosteffectivesolutiontoeliminatethemacroandmicrofouling,scaling

andotherdepositsfromthecondensertubes.Thislastlineofprotectioninyourcoolingwatersystemsincreasesormaintainsyourheatexchangerateofyourcondenserbykeepingthetubesconstantlycleanreducingtheoperatingcostandmostimportantlyreducingyourfootprintontheenvironment.

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100.K.1002.102010