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PleasureCraftTheScienceofSilenceHalyard Anti-VibrationBilgeWaterFiltrationEngineProtectionExhaustSystemsNoiseReductionDistributorsWarrantySupportProductIndex3581013141520212226Page24AquadriveEngineMountsWavestreamExhaustAlertSeaStrainerAlarmSprayHeadRisersSilencersSeparatorsExhaustHoseSiliconeBellowsAccessoriesInsulation ANTI-VIBRATION-AquadriveWHYFITANAQUADRIVEAnAquadrivewillreducestructurebornenoiseandvibrationbyupto90aswellasreducingtheoverallnoiselevelsbyupto75andtheshaftalignmentproblemswillceaseoninstallationasitallowstheenginetobeinstalledat.TheAquadriveallowsanglesbetweentheengineandtheshaftandproblemswillbeeasedwhenre-engining.AQUADRIVETOSUITALLENGINESModulineAquadriveTwentyyearsofdevelopmenthasproducedacompletelynewrangewithlessweightlesslengthmorepowercapacityandalltheadvantagesoftheoriginalconcept.TheAquadrivespecialdriveshafthasbeenup-ratedtotakemorepower.Thethrustbearingassemblyisnowcastfromspeciallytreatedalloystoreduceweight.Theshaftcouplingishiddenawayinsidethethrustbearingtoreducelengthandweightdramatically.LongShaftAquadrivesSystemswithlongerAquadrivespecialdriveshaftsallowtheenginepositiontobevariedenormously.Shaftsupto4metreslongallowenginestoberaisedorloweredrelativetothepropellershaftorevenmovedovertooneside.HalyardPleasureCraftTheScienceofSilence3 Aquadrive4DriveShaftThrustBearingGearboxAdaptor WhatsInsideanAquadriveTheAquadrivehasfourmaincomponents.Thegearboxadaptorisreadymadetocoupleourdrivetoyourgearbox.BehindthiscomestheAquadrivespecialdriveshaftwithatoughconstantvelocityjointateachend.Thenthethrustbearingengineeredtotakeforwardandreversethrustandrubbermountedtoreducenoise.Finallytheshaftcouplingproducedforawidevarietyofshaftdiameters.Thethrustbearingisincrediblytoughandbuiltwithraceswhichcanbereplacedevenaftermanyyearsrunning.SealedballbearingracesrequirezeromaintenanceonsmallerAquadrives.Taperrollerunitsarebuiltintothelargersystems.TheAquadrivespecialdriveshaftwilltakeanangleofupto8ateachendandthentakeevenmoremovementduetovibration.Itwilleventakeforeandaftmovementitiseasytoforgetthatanenginevibratesforeandaftasmuchasitdoesupanddown.Gearboxadaptorsareproducedforalmosteverygearboxonthemarkettoday.Theyaresuppliedwithallthecorrectnutsboltsandwashers.AQUADRIVEENGINEMOUNTSCOMPLIMENTINGTHEAQUADRIVESFLEXIBILITYTheAquadrivesystemcreatesfreemovementbetweentheengineandtheshaft.Oneresultisthattheenginesmountingscanbemuchsofterthannormalpartlybecausetheenginecanvibratefreelyrelativetotheshaftandpartlybecausenopropellerthrustreachesthemountsandstrainsthemforwards.Aquadriveenginemountsareusedwithenginesoffourcylindersormoreandourexpertstaffwillrapidlyselectthecorrectrubberstiffnessforthemachineryinvolved.HalyardPleasureCraft5 6Aquadrive HalyardPleasureCraft7HowdoesitsolveshaftalignmentproblemsMarineenginesaresupportedontimberorsteelbearersxedintothehull.Thesebearersarepositionedtoallowtheenginetolineuproughlywiththeshaft.Theengineisthenadjustedonitsmountssothatitlinesupwiththepropellershaftcouplingwithinafewthousandsofaninch.Allthistakeshoursofpainstakingwork.Andthenwhenyoulaunchtheboatortightenthebackstayonayachtitallmovesslightlyandneedstobedoneagain.TheAquadrivechangesalltherules.ThepropellershafttsintotheAquadrivesthrustbearingwhichisxedrmlyintothehull.TheengineisconnectedusingtheAquadrivesspecialdriveshaft.Thisallowsmisalignmentof12.5mm12ormoreonlargerAquadrives.Enginealignmentcanevenvarywhilerunningsothemovementonanolderortimberhullisnotaproblem.CantheenginebeinstalledflatMarineenginesarenormallylinedupwiththepropellershaftwhichhastoangledownthroughthebottomoftheboat.Theenginethereforeendsupwithitsfronthigherthanitsbackwastingpreciousheadroom.FitanAquadrivebetweentheengineandtheshaftandsuddenlyyouhaveanangleof10ormoreallowingtheenginetobettedhorizontally.TheAquadrivethrustbearingtakesthepropellershaftandthespecialdriveshaftissimplyinstalledwiththedesiredangleateachend.Themaximumangledependsontheshaftspeed.WillAquadrivehelpmere-engineThebiggestprobleminchoosinganewengineisttingitintheexistingspacewiththefewestpossiblechangestothecraft.Justimaginetheexibilityifyoucouldputananglebetweenthenewengineandtheexistingshaft.OrusealongerAquadrivetolowerthewholeengine.OrttheAquadrivetotakeoutmovementbetweenanewenginewithexiblemountsandtraditionalsolidsterngear. WavestreamBILGEWATERFILTRATION-WAVESTREAMAdevelopmentofworld-wideimportancewhichpreventsoilybilgewaterbeingpumpedintothesea.Alltypesofboatsriskpollutingtheirsurroundingswhentheypumpouttheirbilges.Bilgewaterinvariablycontainsfueloillubricatingoilandgreasewhichcannotbeseparatedandisdumpedintotheseasandriversoftheworld.Legislationtopreventthisoperatesinmostpartsoftheworldandisbeingprogressivelytightened.Wavestreamhasbeendevelopedfortheoilandshippingindustries.XOilisaltermaterialwhichbondswithoil.Itisprocessedintosheetformandconvertedtosimpleltercartridgeswhichteasilyandneatlyintothepipeworkfrombilgepumps.SoeffectiveisXOilthateachltercartridgewilladsorb3timesitsownweightofoil.SoefcientisXOilthateventhesmallestsystemwillhandle40litresperminute.SowelcomeisthetechnologythattheentireBTGlobalChallengeeetadoptedit.SoimportantisthedevelopmentthatLloydsRegisterhasgivenTypeApprovaltothebasicproduct.Watermakerprotection.TheWavestreamlterisidealforwatermakerprotectionpreventingoilscausingfataldamagetodelicatereverseosmosismembranes.WavestreamMicroSystemDesignedforthebilgesofdayboatsRIBsandsmallsportsboatsorwhereminimalspaceisavailabletheMicrounitiseasytoconnectintothebilgewatersystemusingBSPconnections.Theunittakesaspaceonly190mmhighby120mmdiameter.Filtercartridgescanbereplacedinseconds.Wavestream1000SystemThe1000systemhasalargerlterelementtocopewiththedemandsoflargerpleasureboatsupto20m.34BSPconnectionsareusedandtheowrateat40litresisthesameastheMicrosystembutltercartridgereplacementintervalsdouble.8 HalyardPleasureCraftWavestream2000SystemRecommendedforlargepleasurecraftandcommercialboatsthe2000systemwillhandlebilgepumpowratesupto265litresperminutewitha117mmdiameterltercartridgeand112BSPconnections.Wavestream3000SystemThe3000isdesignedforlargecommercialcraftandships.Itincorporatesamassiveltercartridgealmost500mmlongwithsignicantlyincreasedcapacity.TheowrateandBSPconnectorsarecommonwiththe2000series.WavestreamStainlessSystemsThesemulti-cartridgesystemswerebornintheoilindustrybutcanbeusedforevenlargervesselsthanthe3000system.Eachunitisproducedtomeetadenedneed.Detailsoftheowratesareneededtospecify.AllsystemshaveLloydsApproval.9 ENGINEPROTECTIONEXHAUSTALERTWhyfitanExhaustAlertMarinedieselexhaustsystemsaredesignedtotaketemperaturesofonly120C.Theexhaustgaseshowevermayreachmorethan500C.Tocoolthegasestheexhaustdependsonthefreeowofcoolingwaterfromtheengine.Thisowcanbecutoffbyaplasticbagorseaweedbeingsuckedintotheintakeorbyaproblemwiththewaterpump.Theexhausttemperaturewillriseimmediatelytoaround450Ctheexhaustwilloverheatandmaybeseriouslydamaged.InmostsituationstheExhaustAlertwillwarnyoubeforeseriousdamageoccurs.WhatmakesExhaustAlertsodifferentAnexhausttemperaturealarmsystemmustmeasuretemperatureinsidetheexhaustsystemtobeeffective.Sensorsttedontheoutsideoftheexhaustcannotrespondquicklyastheymustwaitfortheheattoworkthroughthehosetoreachthesensor.WillitprotectmyengineTheExhaustAlertisdesignedtoprotectonlytheexhaust.Thesystemshouldnotberegardedasanengineprotectiondevicealthoughitmaybeattheenginetemperaturesensorswhentheengineiscold.HowdoesitworkTheExhaustAlertworkswitha12Vor24Vsupplyandithasthreemaincomponents.HalyardPleasureCraftTemperatureSensorAstainlesssensorwhichscrewsthrougha10mmholeintheexhausthoseplacingatemperaturesensorrightinthegasowabout100mmbehindtheengine.Uptothreesensorscanbeusedcoveringtwinenginecraftandgenerators.TheHelmDisplayThisdisplaytsnearthehelmandhadlightindicatorsforreadyandwarninglightsforeachengineandasmallbuzzer.A120dBsirencanbeconnected.Thedisplayself-testswhentheengineisturnedonashinglightsandsoundingthebuzzer.Ifthesenoroverheatstherelevantlightwillashandthebuzzerwillsound.Abuttonallowsyoutoshutdownthebuzzer.AnothersystemisavailablewithoutahelmdisplayanOEMkitwhichexpertscanwireintotheirownsystems.JunctionBoxThejunctionboxmountsintheenginespace.Thiscompactunittsonthebulkheadoftheenginespace.Wiresfromthesensorsandthehelmdisplayconnecttoit.Itconnectstothepowersupplywhichmustbelivewhentheignitionisturnedon.10 ExhaustAlert11 SeaStrainerAlarm12SeaStrainerAlarmwithaHelmDisplaySeaStrainerAlarmwithOEMControlBox EngineProtectionTheSeaStrainerAlarmSystemWhyMarineenginesarecooledbyrawseawaterdrawninthroughthebottomofthehullandpumpedthroughtheheatexchanger.Blockthisvitalsupplyandproblemsfollowimmediately.Thewaterpumpimpellerfailsalmostinstantlyandengineoverheatingfollows.Inextremesituationsreallyseriousdamagecanbedone.HalyardsSeaStrainerAlarmbuysyouprecioussecondstodealwiththeproblembeforeanydamageoccurs.ImpedetheowofwaterthroughthestrainerorstarttheenginewiththeseacocksturnedoffandtheSeaStrainerAlarmtellsyouinstantly.HowTheSeaStrainerAlarmspotstherestrictedwaterowinthehosebetweenthestrainerandthepump.Toogreatarestrictionandthesensorlosescurrent.Thecontrolboxinstantlypicksthisupandthealarmsystemissetintrain.HalyardhastakenthreeyearstoresearchtheSeaStrainerAlarmstudyingtheowbetweenseastrainerandpumpsforenginesofoverahundreddifferentsizesandtypes.WiththeaidofasignicantECgrantweveplottedthesetoensurewecanspecifyasensorwhichalarmsimmediatelythewaterowisseriouslyimpededbutdoesntalarmunnecessarily.Allyouneedtellusaretheenginesizeandtheinsidediameterofthepipefromtheseastrainertotheenginepump.FittingTheseastraineralarmtsneatlyintothewatersupplybetweentheseastrainerandtheenginerawwaterpump.Theunitissuppliedcompletewithttingsfortheappropriatehosediameter.YousimplycutthesupplyhosettheTpieceintothehoseandsecurewithhoseclips.Youthenconnectthesensortothecontrolboxupto3sensorscanbeconnectedcoveringboatswithsingleortwinenginesandagenerator.Thecontrolboxrequiresa12Vor24Vsupply.Youthenconnectthesimplehelmdisplaytothecontrolbox.IfyoupreferyoucanttheOEMcontrolboxallowingyoutoincorporateyourowndashboardlightsinsteadofthestandardhelmdisplay.Youcanalsoconnectanoptionalalarmsirensupplementingthesimplebuzzersuppliedinthehelmdisplay.HalyardPleasureCraft13 ExhaustSystemsExhaustSystems-SprayheadsRisersSprayheadsManyenginemanufacturersmakeastandardsprayheadforusewhenahighriserisnotneededifnotthenHalyardcanhelp.Wecanalsoproducesprayheadswithparticularspraypatternsforinstallationswherecoolingiscritical.ModularsprayheadandhighriserThismodularsprayheadrotatesatthreepointsalongitslengthsothattherisercanbeincorporatedintheexhaustintheeasiestpossibleway.Oncepositionedspecialclampsoneachjointaretightenedtoxthepositionpermanentlyandtheheatresistingjacketsaretted.14 HalyardPleasureCraftSilencersExhaustSystemsWhyweuseSilencersNoisecanbetiringandcauseseasickness.Ourobjectiveistoachieveanexhaustnoisereductionofaround40withourbasicsilencers70withourspecialistdualchambersilencersor80withsilencersandourexhaustwaterseparationunits.WhatismarineexhaustachievingAmarineengineexhaustsysteminjectsthecoolingwateraswellassilencingtheenginescombustionnoiseandremovingtheexhaustgasses.Thesystemmustcreateminimalrestrictiontotheowofexhaustgassesknownasbackpressureortheenginemaybedamaged.Therearefourmainobjectives1.Tominimisetheriskofwaterrunningbackuptheexhaustandintotheenginecylinderscausingseriousenginedamage.2.Tocooltheexhaustandejecttheenginecoolingthroughtheexhaustwithoutexcessivebackpressure.3.Toreducenoisebybetween40and90.4.Tositetheoutletsatthesternoftheboattominimiseexhaustfumesonboard.15LiftSilencerOvalInlineSilencerWaterSeparater SilencersExhaustSystemsDesigninganExhaustSystemThemostvitalquestionwhendesigninganexhaustWheresthewaterlineEnginewellaboveWaterlineTheengineissitedwellabovethewaterlinewithagradientsteeperthan1in8tothebackoftheboat.Thewaterwillrunnaturallydowntheexhausttothestern.Toreducenoisebyupto40astraightforwardin-linesilencershouldbeused.Toreducenoisebyaround70adualchamberunitcouldalsobeused.16 HalyardPleasureCraft17EngineonlyjustabovetheWaterlineWatercouldrunbackintotheengineifthevesselpitcheswiththeenginenotrunning.Therearetwosolutionsandbothneedtobechecked.FitaHighRiserStainlesshighrisersraisetheexhaustabovethebackoftheenginebeforethecoolingwaterisinjected.Thisformsasteeperslopetothesternandmayachievethe1in8gradientrequired.Astandardinlinesilencercanthenbettedtoachieveanoisereductionofaround40oradualchambersilencerachievingupto70.FitaDualChamberSilencerThedualchambersilencermeansthehoseslopessteeplydownfromtheenginetothesilencerandagainfromthesilencertothestern.Thegeometryneedscarefulcheckingbutitcansolvetheproblemandoffersanoisereductionupto70.EnginenearorbelowWaterlineMostdisplacementcrafthavetheirengineslowdown.Thehosefromtheenginerunsdowntothesilencertrappingthewaterinsidethesilencer.Thehosefromthesilencerrunsstraightuptoagooseneckandthengraduallydowntothestern.Waterinthesystemdrainsintothesilencerwhentheengineisstopped.Awavecomingupthesternisunlikelytoclimboverthegooseneck.Syphonbreakersshouldalwaysbeusedinthecoolingwatersupplytoinstallationsofthistype.Normalliftsilencersreducenoiseby40orso.Youcanaddawaterseparatortoincreasethistoaround80. LiftSilencersHorizontalLiftSilencersTheselowlyingunitscanbeveryusefulinsailingyachtswherethesilencerneedstobesecuredalongsidethepropellershaft.SideInTopOutLiftSilencerTheselowlyingunitscanbeveryusefulinsailingyachtswherethesilencerneedstobesecuredalongsidethepropellershaft.TopInTopOutLiftSilencerInmanyapplicationsatopinletunitwillbeeasiertouse.Thenoiseresultandcostarethesameasthesideinletunitsthesamerigorousqualitytestsapply.18HorizontalLiftSilencerSideInTopOutLiftSilencerTopInTopOutLiftSilencer HalyardPleasureCraftSilencersRoundIn-LineSilencerThesesilencersaremadefromstronglamentwoundtubegivingthemaximumpossibleprotectioniftheexhaustback-res.Everyunitispressuretestedbeforebeinggel-coated.Theymustbeinstalledwithin5ofhorizontaltowardsthestern.OvalIn-LineSilencerTheseovalsilencersarehand-mouldedforusewheretheroundbodyunitcannotbeaccommodated.TwinInletIn-LineSilencersarebuiltonanindividualbasisforVengines.Theanglescanbeangledtoeasetheconnectiontotheengineandpositionedontheendorontheside.TwinInletDualChamberLiftSilencerSomedualchambersilencershavetwoinletstoaccepttheexhausthosefromaVengine.Eachinlethasbeenspecicallyangledtosuittheparticularcraftandtheoutletpointsstraighttothepositionedprovidedonthehull.DualChamberSilencerExhaustnoisereductionofupto80canbeachievedandthebackpressurecreatedbytheunitisminimal.Mostunitsarehandbuiltwithinletandoutletpositionedtosuittheparticularcraft.AllSilencershaveLloydsApproval.Allofoursilencerscanbecustommadetospecication.19 WaterSeparatorsMid-SizeSeparatorThelargerseparatorisdesignedforusewherethegeneratorscoolingwaterowrateexceeds40litresperminuteandthegeneratorexhaustisupto90mmdiameter.Individualapplicationsmustbecheckedforcorrectsizinganditcanalsobeusedwithpropulsionengines.Mid-EngineSeparatorThemid-engineseparatorisaneasysolutionformostengineswithexhaustsfrom90mmupwards.Theunitsareproducedusingthesameproventechnologyasseenwithoursilencerswitheveryonepressuretested.Theunitcomeswithdifferingbodysizestomatchavarietyofexhaustinlets.Twowaterdrainsareprovidedonmostunitssothatyachtscanhaveanoutletforbothanglesofheel.MillenniumSeparatorThisseparatorisavailableinfoursizescoveringexhaustdiametersof40mm50mm63.5mmand75mm.Thiscanbepositionedpointingleftorrightandcanofferachoiceofahorizontalorverticaloutletfromthetopattheside.TherangealsobenetsfromnojointsorsealswhichreducesthepotentialriskofleaksNojointsorsealswhichreducesthepotentialriskofleaksTheoutletisatmaximumheightfacilitatingasafeexhaustdesignAhightemperaturematerialwhichreducestheriskofmeltinginanexhaustoverheatsituationWaterseparationisalmost100apartfromcondensationinthedryhoserunbehindtheseparatorAllSeparatorshaveLloydsApproval.Separators20 ExhaustHoseSiliconeWestockhoseinavarietyofsizesrangingfrom40mmto300mmandisgenerallyLloydsapproved.Almostallourhosepassesthestringenttestsontemperatureandozonedeterioration.Thedesignofthehoseoffersverytightcornersbutthewallthicknessremainsheavyenoughtogivesecurity.OnlyrealTBarexhaustclampsshouldbeusedwhenttingthehose.Ourhoseisalsoavailablewithahightemperaturelinerallowingthehosetohandletemperaturesreaching140.ForhightemperaturesSiliconecanbeprovidedintwogradesandhandlingtemperaturesof170and260.ExhausthoseshouldbettedusingtoughTBarclampsdoubledwhereverpossible.Westockclampstosuithoseupto300mmbothinstainlesssteelandzincpassivatedsteel.GRPExhaustTubeWealsomanufacturerourownlamentwoundGRPtubeforuseinsilencers.Diametersfrom50mmupwardsaremaderangingrightthroughto600mmwithallthetubesmadein3mlengths.Hightemperatureresinsareusedallowingnormaloperatingtemperaturesofupto85andbriefexposuretotemperaturesashighas300willnotcauseaproblem.GRPBendsAdaptorsWemanufacturerafullrangeofGRPbendsandadaptorswhichareallfabricatedfromourspecialhightemperatureGRPtubeandaredesignedtogetyouaround4590and180bendsortocouplehosesofdifferingdiameters.FlexibleEPDMRubberSiliconeBellowsWillenableyoutogetaroundtightcornersintheexhaustsystemwithlessbackpressurethanaGRPfabricatedbend.Thestandardunitstakeupto100andthesiliconeupto180.AllStandardHosehaveLloydsApproval.HalyardPleasureCraft21 BellowsAccessoriesSiliconeBellowsFlexibleexhaustbellowsareimportanttoisolateenginevibrationfromtheexhaustsystemparticularlywhereasilencerorrigidsectionisclosetotheengine.Ourbellowscoverawideupto300mmexhaustsystemsandtheywilltaketemperaturesupto170.JumpersWhereveryouconnectabellowsorarubberelbowbackintoanexhausthoseyouneedashortlengthofGRPexhausttubetocouplethemupjumpersaremadeupto300mmindiameter.SiphonBreakersThesiphonbreakerplaysacrucialroleinthemarineexhaustsystempreventingthecoolingwaterbackingupintotheenginewhenthisislowinthehull.Thesiphonbreakeriscastfrombronzeandincorporatesatappingpointforsomecoolingwatertobedrawnofftofeedthesterntubebearings.HotlagHotlagisdesignedtowraphotpipeswiththermalinsulatorwhichisasbestosfreewitharangeofspecialclampstoholditrmlyandpermanentlyinplace.22 HalyardPleasureCraftExhaustTransomFittingsWhentheThruHullttingwasdesignedthebriefwastomakeaproductwhichwasinnitelystrongerthantheplasticandGRPunitsthatwerealreadyavailableandtougherthanmoststainlessunits.OurThruHullttinguses3mmthick316stainlesstoensurethattherisksofdamagewhenmanoeuvringacraftarereducedtotheabsoluteminimum.Allunitsaredesignedsothattheapatrestisshroudedbythestainlessrimtopreventdamageifthevesselnudgesaharbourwall.ThruHullFittingsNeopreneFlapUnitstoacceptexhausthoseuptoandincluding100mmhosehaveneopreneaps.EachhasageneroustailallowingTBarexhausthoseclampstobeusedtosecurethehose.Smallersizeshavethreecountersunkxingholes.The90mmand100mmunitshavefourboltholesandaboltingangewhichtsrightaroundtheunitinsidethehull.ThruHullFittingsStainlessFlapUnitsfrom125mmupwardsallhavestainlessapslinedwithneoprene.AllhavetailswithplentyofspacetouseproperTBarclampstosecurethehose.Betweenfourandeightboltholesareprovidedandallunitshaveboltingangestotaroundtheunitinsidethehull.Sizestosuitupto300mmhosearecurrentlymanufacturedandtheyareanormalstockitemupto254mm23 NoiseInsulationBenefitsofNoiseInsulationMarinedieselscreateveryhighnoiselevelsoftenwellover100decibels.EnginesarealwayslocatedclosetotheboatusergenerallyinenginespacesmadefromGRPtimberorsteel.Enginenoiseisthenampliedbybouncingaroundbetweenthehardbulkheadsandthesteeloftheactualengines.Noisecontributesseriouslytofatigueandseasicknessaswellasspoilinglifeonboard.Noiseinsulationchangesallthis.Itaddsasoftfacingtohardbulkheadstoabsorbnoiseandstopitbouncingaroundandgrowing.Itaddsweighttothebulkheadtoreducenoisetransmission.Itfeaturesaclevermulti-layerconstructiontomakeathinmaterialmoreeffectivethansimpleinsulationsmanytimesthicker.Ifyoucocoontheenginewithnoiseinsulationyoucanreduceairbornenoiseby85andtransformthecomfortforallonboard.RememberstructurebornenoiseandexhaustnoiseareseparatesubjectsandHalyardcanhelpwithboth.Halyardoffersthreematerialthicknesses12mm32mmand45mm.TheIsolationLayerThisthinlayeroffoamhasacrucialfunctionItactslikethegapindoubleglazingandstopsthenoisewhichhitsthetransmissionlayerbeingcarriedthroughtothebulkheadjustlikethegapindoubleglazing.Themulti-layerconstructionusedinHMImaterialsoffersthebestpossibleacousticresultinthicknesseswhichcanbeaccommodatedinthetightestenginespacebeatingsimplermaterialsmanytimesasthick.TheabsorptionlayerAthicklayerofrezeroratedfoamwhichsoaksupnoiseandstopsitbouncingaroundtheenginespace.ThetransmissionlayerAhighdensitybarrierprovidesthehighestpossiblemassandgivesthebestnoisereduction.TheHMIdampinglayerweighs5kgspersquaremetremorethantheleadsheetusedinoldermaterials.24 MaterialTypesMaritexAtoughbreglassclothwithasealedmetallisedskinsoitcannotabsorboil.Itwonttearorfray.Itlooksheavydutyanditisrezerorated.MaritexissimplythebestfacingintheHMIrange.MaritexisrezeroratedtoBS476parts6and7.SeaglassAtoughoff-whiteglassclothsealedagainstoil.Theclothisextremelytoughandwillnottear.Thesealantwillburnoffinare.ThematerialmeetstheISO9094rerequirementsoftheEURecreationalCraftDirective.Re-enforcedSilverPolyesterThisfacingmeetstherequirementsoftheRecreationalCraftDirective.Itprovidesasealtokeepoilout.Youcanpierceitbutithasare-enforcinglayerbehindit.ItwillburnbutoncelaminatedinplaceitmeetstheISO9094rerequirementsoftheEURecreationalCraftDirective.Inarethefacingwillburnbutnotthefoambehindit.Formoredetailedinformationonallourproductsthenpleasevisitourwebsitewww.halyard.eu.comwhereproductmanualsinstallationguidesdatasheetsanddrawingscanbeobtainedviaourDownloadssection.HalyardPleasureCraft25 HalyardPleasureCraftDistributorsWarrantySupportDistributorsHalyardhasastronginternationalpresencewithsuccessfulinstallationsinalmosteverycorneroftheglobe.Allourdistributorshavegreatknowledgeofourrangeandmanyyearsexperiencewithinthemarineindustry.WithourTechnicalSalesteamarebasedintheUKwearealwaysonhandtodealwithanyqueriesorquestionsdirectly.WarrantySupportAllourstandardproductscomewithafull12monthwarranty.OurcustomerserviceteambasedintheUKwillbehappytoofferadviceregardingproductselectionorinstallationadvice.Pleasefeelfreetocontactusatw.www.halyard.eu.come.techhelphalyard.eu.comt.440172271092226 TheScienceofSilencew.www.halyard.eu.come.techhelphalyard.eu.comt.4401722710922 HalyardPleasureCraftGlobalSupportDistributionw.www.halyard.eu.come.techhelphalyard.eu.comt.4401722710922