SYSTEM FEATURES: • Over 53.000 engines well protected by VISATRON ® • Automatic opacity adaptation to engine in nor - mal operation - False Alarm Free System even under frequent changes in engine load and rpm • Extremely low maintenance cost - designed for engine lifetime • Active Dirt protection of optics by clean air - only available from SchAllEr AutOmAtiOn • Designed for vibrations beyond classification rules • class approval of 11 classification societies technical information SINCE 1956 OIL MIST DETECTION SYSTEMS VISATRON ® Vn115/87 plus Vn116/87 plus Vn215/87 plus Vn115/87 plus EX ... a member of DiEmOS ® family
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OIL MIST DETECTION SYSTEMS VISATRON - Schaller · All ViSAtrOn® Oil mist Detectors are equipped with 3 re-lay outputs: - System ready - pre-Alarm ... or right side of the position
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the measuring heads containing the optical system foropacitymeasurementaswellastheelectronicsaredesi-gned to be interchangeablewith the ones of the formerVn/87series,producedforalmost25years.
theEngineatmosphere,butwithfreshpressurizedair,so theoptical system ismaximallyprotectedagainstdirtcontaminationandstaysclean.Alsothefiltersstaycleanforalongerperiod.
applIcatION OF the dIFFereNt VISatrON® deVIceS aNd SuctION SyStemS
4
the detection of damage takes place through a headerpipesamplingsystemwithout localisationof thepointofdamage. themixtureof atmosphere from the crankcasepassesfromallindividualcompartmentsviatheheader
pipe through the detector‘s pipe connector box into theopacitymeasurementpathinthehousingofthemeasuringhead.thealarmthresholdcanbesetto4levels.
the dIFFereNt VISatrONS®
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161
Original A0 Dimension drawing VN115/87plus
von 2
DC180161 02CAD-ZeichnungBenennung Sach-Nr.Ausg. Datum Ze. RS Datum Name Blieskastel / Saar002 29.07.08 Mü Gez. 12.03.08 Winter003 11.04.16 JH Gepr.
Norm
M21:1
Werkstoff,Halbzeug Toleranzen Masstab
M25x1,5
G 1/2
A-A
G 3/4
G3/4
G 3/4
4 mountingholes for M8screws orthread bolts
compressed airconnection 2-15 barfitting G 1/4
120
175
174
ca.113
108 ca.179
ca.5
3811
1
158
111
140146
171
4652
116.5ca.197
7.5
the detection of damage takes place through a headerpipe sampling system with a display of the crankcasecompartment half in which the overheating damage hasarisen.themixtureofatmospherefromthecrankcasepas-ses fromall individualcompartmentsvia theheaderpipethroughthevalveboxintotheopacitymeasurementpathinthehousingofthemeasuringhead.iftheopacityofthemixtureofatmospherefromthecrankcaseexceeds10%ofthealarmthresholdthathasbeenset,aso-calleddamagecheckstarts.
thevalves in thevalveboxareswitchedoveraccordingtoacertainalgorithmduringthedamagecheck,until thehalfofthecrankcasecompartmentswiththeoverheatingdamagehasbeenfound.thealarmthresholdcanbesetto4levels.theincreasedsensitivity,incomparisonwiththeVn115/87plus, results from the fact thatanalarm is trig-gered if thedifference inopacitybetweenthetwohalvesofthecrankcasecompartmentexceeds20%ofthealarmthresholdthathasbeenset.
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/180
162
Original A0 Dimension drawing VN116/87plus
von 2
DC180162 02CAD-ZeichnungBenennung Sach-Nr.Ausg. Datum Ze. RS Datum Name Blieskastel / Saar002 29.07.08 Mü Gez. 12.03.08 Winter003 11.04.16 JH Gepr.
the detection of damage takes place through a headerpipesamplingsystemwithout localisationof thepointofdamage. themixtureof atmosphere from the crankcasepassesfromallindividualcompartmentsviatheheader
pipe through the detector‘s pipe connector box into theopacitymeasurementpathinthehousingofthemeasuringhead.thealarmthresholdcanbesetto4levels.
the dIFFereNt VISatrONS®
VISATRON®Vn115/87plusEX
10
ca.148
ca.180
angle freely
adjustable
195.
5
ca.186
175
120
15
ca.6
30.5
174
ca.5
38
44.552
ca.143
1407.5
158
171
111
202116.5
ca.87
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Dat
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/180
164
Original A1 Dimension drawing VN115/87plus EX
von 2
DC180164 02CAD-ZeichnungBenennung Sach-Nr.Ausg. Datum Ze. RS Datum Name Blieskastel / Saar002 06.10.14 Wi Gez. 15.09.14 Winter003 01.07.16 Wi Gepr.
Norm
M21:2
Werkstoff,Halbzeug Toleranzen Masstab
M25x1,5
G1/2
flexible hose with screw connectionfor pipe - diameter 10mm
Suction vacuum measured against the atmosphere 60mmwc.themeasurementisperformedwithau-pipema-nometeron themeasuringhead.theu-pipemanometeris a component of the service box (see accessories). Airconsumptionmax.2,5nm3/h(m3atatmosphericpressu-
comprehensiveinvestigationsondifferenttypesofengineshavemade clear that the sampling points for the oilmisthavetobeplacedintheinteriorofthecrankcaseatpointswherethehighestpossibleconcentrationofoilmistcanbeextracted, incaseofdamage,withouta lossof time.theconcentrationofthedrawnoilmististhemessageastotheconditionofthecrankdrivefortheoilmistdetector.itbeco-mesimperativethatagenuineinformationistransmittedas
shows the conventional installationof aViSAtrOn® oilmistdetectorVn215.thepipeshavethenecessaryslopeforthereturnoftheoilthathasprecipitatedfromtheoilmist.Duetothisslope,thepipesrequireanotableareaoffreespace,extendingovertheentirelengthoftheengineandpart of its height, avoiding thisway that the pipesobstructtherequiredspaceforaccessingthecrankcasedoorsandcompartments,duringmaintenancework.
shows, the installation of a ViSAtrOn® oilmist detec-tor, type Vn215, with individual compartment suctionpipesystemconsistingof a space-savingsiphonblockassemblyset.theadvantageofhorizontalpipeinstalla-tioncanbeclearlyrecognised.Oilthatprecipitatesinthesuctionpipesisledbackintothecrankcasethroughthesiphonblocks.
shows a further alternative in tubing arrangement forVn115/87plusandVn116/87plus.toavoidcollectionofexcessiveoilinthehorizontaltubingsystem,oilseparati-onunitsareinstalled(seemarking).
the engine wall connections join the labyrinth suctionheadslocatedinsidethecrankcasecompartmentandthesuctionpipesontheoutside,andareavailableinvariousdesignswith differentmetric or pipe thread sizes. laby-rinthsuctionheadswithdifferentpipelengthscanbeins-talled(seeillustration4).theenginewallconnectionscanbeusedforconventionalsuctionpipesystemsoralso inconnectionwithViSAtrOn®siphonblocks.
SchAllEr AutOmAtiOn has developed various typesofViSAtrOn®assemblyunits,inordertoadapttothein-stallation conditions on almost every engine design. theassembly units consist of a ViSAtrOn® OmD, a speci-fic engine adapted bracket, available for crosshead andtrunkpistonengines,anintegratedprotectivecover,anairpressureregulationunit,fixturesandfittingsforthecom-pressedairsupply.theassemblyunit isacomponentoftheViSAtrOn®assemblyset.SchAllErAutOmAtiOnsupplies special, ready-mademodular assembly sets forVISATRON®oilmistdetectors,foravarietyofenginetypesfromworldwidemanufacturers.Anoilmistdetectionsys-temforaspecificengine,(illustration6)consistsof:•theassemblyunitwithoilmistdetector•thepipeconnections,eitherwithenginewallconnections•orsiphonblocks•theready-madepipes•Allnecessaryfittingmaterial,suchaspipesupportsand•fasteningelements
pressure regulation unit (illus. 8) the pressure regulationunit consistsof apressure regulatoranda throttleblockwithanintegratedairfilter.thethrottleblockensuresthatthedriveairpressure in theViSAtrOn®oilmistdetectordoesnotincreasetoanexcessivelyhighlevelifthepres-sureregulatorfails,(e.g.failureofdiaphragm).thepressu-reregulationunitisdelivered,pre-assembledandreadytooperate,withitsbracket.
SchAllErAutOmAtiOnoffersaspecialdesignservice,set up for the ViSAtrOn® adaptation to the engine forquickassembly,thatisavailabletoallourclients.ServiceBox (illus.7)on request.theserviceboxcontainsall re-placementparts,toolsanddevicesnecessaryfortheiniti-aloperation,therepairandthefixingofmalfunctions.theamountofreplacementpartsintheserviceboxisdesignedinsuchawaythatastockofreplacementpartsisavailableforanoperatingperiodofoneyear.
withreleaseoftheunifiedrequirements(ur)m10(‘pro-tectionof internalcombustionenginesagainstcrankcaseexplosions’)andm67(‘typetestingprocedureforcrank-case Oil mist Detection and Alarm Equipment’) in 2006,iAcS first-time requested similar tests via classificationsocietiesfornewenginetypesresp.vesselnewbuildings.
Omdea® OIl mISt detectION eFFIcIeNcy apprOVal
SchAllEr AutOmAtiOn offers damage simulation tointegrate theOmDSystem in best possiblemanner to aspecificenginetype.