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Inner Values Perfectly Sealed Mechanical seals for difficult conditions
ADITEC GmbH is a Künemund Group company, with its headquarters in Engstingen-Haid. The company combines the development and production of its own seals with advice and sales.
Productsp Elastomercouplings(rubber-metalconnections)p Flat,fabric,axialfaceandspecialsealsp Sealrings/ceramic/carbon/chromesteel/stainlesssteelp Piston,packing,O,VandXringsp Shaftsealingrings(axialandradialsealingrings)
To be able to fulfill all our customers’ requirements, ADITEC GmbH provides for the development and production of high-quality axial face seals, in some cases using GOETZE technology, as well as offering technical advisory services and distribution of static and dynamic seals from renowned manufacturers. These products are indispensable in mecha-nical engineering and plant construction, gearbox manufacturing, vehicle construction, medical engineering, pump construction, hydraulic and pneumatic applications, agricultural machinery and dishwashers and washing machines.
2 |Sealsfromourownproductionanddistributionofsystembrands| | 3
Markus Böttcher, in-house sales, ADITEC GmbH
The range of applications for seals is almost unlimited. As is the scope of advice we give and the products we make.
| 54 |
ContentTypes 5Standardandadditionalprogram 6Materialcombinations 7Mechanicalfaceseals 9Counterfaces 12Types 13Installationmethod,functionalbehaviour 14Materials 15Materialcodes 17Dimensionsoverview 18
Mechanical face sealsDeliveryProgramThewideproductrangeincludesMechanicalFaceSealsaswellasstaticanddynamicsealsforeveryneed.Incaseofquestionsweliketohelpyouwithtechnicaladvice.
Seals – high tech technology:p GOETZE-IndustrialPartswiththebestmanufacturingknow-howMechanical Face Seals:p forpumps-,hydraulics-,chemicalapparatus,p forhightemperatures,chemicalagressivesubstances aswellasdrytrendPTFE Seals: p forhightemperatures,chemicalagressivesubstances aswellasdrytrendMechanical Face Seals: p forbuildingindustryvehicleswithexcellentresistancetoabrasionWiper Seals: p toprotectsealsfromdirtparticles,withmetalinsert,insideoroutsideV-Rings: p ontheversionsVA/VS/VL/VEorbeyonddrawingup toboreholediameter1200mmRubber/Web-Seals:p closedorslitted,witheasyinstallationtothesealingbefore oragainstthebearingsinsteelworkandpaperfactoriesG-Seal Rings: p tothesealingofneedlerollerbearing,performanceDINAO-Rings:p tothesealingofmultiplexapplicationsAXIAL-Shaft Seal Ring:p tothesealingofbearings,axisandshaftsRADIAL-Shaft Seal Ring: p beyondDINorbeyonddrawinguptoboreholediameter1200mm inNBR,FPM,SI,ACorothermaterialsSlide Bushings/Shaft Protection bushings:p Workingasrunningarea/runningpartnerofradiallipseals.
(forexamplegearboxshaftsetc.)Piston Rings: p forshockabsorbers-compressors-hydraulic-vehicleconstructionElastomer Couplings: p forabsorptionofangulardisplacementandrotaryswinging(GIUBO)Pistons: p forallapplicationsalsoinspecialdesignAssemblies: p pistonrunningbox&pistonrings,installationreadyRubber-Metal-Bondings: p ondesireorbeyonddrawingRotary Joints: p coolant,hydraulik,airStatical Seals: p forsleeves,flaps,lids,enginesandatvehicleconstructions, waterradiatedorpunched,beyonddrawingTaper roller bearings: p tothesealingoftaperrollerbearings
Slot rings, Piston-Spear Seals, Packages, Supporting Rings and Roof Cuffs.
NTN/SNR-Base:Bearingsofallexecutionsandfittings
This technical publication has been prepared with great care and allinformationhasbeenverifiedforaccuracy.Foranyincorrectorincompleteinformationcannotbeheldanyliability.Productfiguresareforillustrationpurposes only and are not useable for construction. All rights reserved.Reprint,evenextractsinwholeorinpartsisnotpermitted.Edition2011
Type 76.12
Type 76.53
Type 76.60/76.62Specialtypefordishwasher
Type 76.61
Type 76.66
Type 76.68
Type 76.70/76.71
Types(Extract)
| 76 |
Mechanical face seals Mechanical face seals
Type 76.12 carbon/Al203/stainless steel
Mechanicalfacesealforstraightshafts,rotatingspring
p Singleseal
p Unbalanced
p Conicalspring
p Rotatingdirectionsclockwiseorlevorotatory
p Dependentfromshaftrotationdirection
p EN12756(DIN24960)
Themechanicalfacesealstype76.12...aremarkedbythesolid,
springloadedcarbonslidering.Thissealgetsmainlyusedinwater
pumps,heatingcirculationpumps.Thissealtypeistypicallyused
forsimpleapplications.
Application limits (importantreference)
d1 =6to40mm
p1 =10bar
t =-20to+180deg.
vg =15m/s
Maxaxialmovement±1,0mm
MaterialsSlidering: carbon
Counterface: typicaltype76.22-
stainlesssteelorausteniticCI(DULENIT)orAl20
3
Correspondingcounterfacesonrequest
Type 76.15 carbon/Al203/stainless steel
Mechanicalfacesealwithconical,rotatingspringandstainless
steelhousing
p singleseal
p unbalanced
p conicalspring
p rotatingdirectionsclockwiseorlevorotatory
p Dependentfromshaftrotationdirection
Application limitsd1 =10to70mm
p1 =10bar
t =-20to+180deg.
vg =20m/s
MaterialsSlidering: carbon
Counterface: typicaltype76.21-/76.22-/76.24-
stainlesssteelorausteniticCI(DULENIT)orAl20
3
Typ ADT – 70.13 Typ ADT – 76.12 Typ ADT – 76.15 Typ ADT – 76.53
Typ ADT – H 70.70 Typ ADT – 70.550 Typ ADT – 76 Typ ADT – 8RX
Typ ADT – 70.100 Typ ADT – 70.200 Typ ADT – 70.300 A Typ ADT – 76.73 S
Typ ADT – SLV Typ ADT – Spezial Typ ADT – AC Typ ADT – 76.17 S
Typ ADT – CMP Typ ADT – DRA Typ ADT – E8 S Typ ADT – E9 S
Typ ADT – 76.62 Typ ADT – GL Typ ADT – E10 S Typ ADT – 76.57/EB2
Standardandadditionalprogram Materialcombinations
| 98 |
Mechanical face seals Mechanical Face Seals
Type 76.57/EB2
Technical datasp Singleacting
p Unbalanced
p Singlespring
p Bayonetspinprotection
p Independentfromdirectionofrotation
Application limits (importantreference)
d1 =10to100mm
p1 =16bar
t =-40to+140deg.
vg =10m/s
MaterialsSlidering: carbon(Z32);SIC(U42)
Rubberbellow: FPM;EPDM
Otherconstruction
materials: stainlesssteel
CounterfaceO-ring
SealingringO-ring
FlatsupportringHousing
Spring
O-ring
Counterface
Sealingring
RetainingcapL-shaped
reinforcingringBellows
SpringSpringcollar
O-ring
CounterfaceSealingface
L-shapedreinforcingring
BellowsSpring
Type 76.53 slide ring carbon; rubber bellow NBR/FPM/EPDM Counterface stainless steel
Application areap ChemicalIndustry
p Waterandsewagetechnic
p Soapywater/lye
Featuresp Worksstandard
p Rotatingwiththeshaft
p Singleseal;Springinside;protectedbythebellow
p Unbalanced
p Independentfromrotationdirectionoftheshaft
Application limits (importantreference)
d1 =6to70mm
p1 =8barmax.
t =-20to+180deg.
vg =15m/s
MaterialsSlidering: carbon
Counterface: typicaltype76.21-/76.22-/76.24-
stainlesssteelorausteniticCI(DULENIT)orAl20
3
Type 76.12
Type 76.53
Type 76.58
Type 76.15
Type 76.57
Type 76.62
SealingringBellowsSpring
SealingringReinforcingring
CuppedsupportringBellowsSpring
Counterface
O-ring
SealingringO-ring
Flatsupportring
Spring
CounterfaceO-ring
SealingfaceReinforcingring
BellowsSpring
TensionSpring
Pumpsealwithsinglespring,independentfromdirectionof
rotation,stationaryrubberbellowinside.
Application limits (importantreference)
p1 =12bar
t =-30to+200deg.
vg =10m/s
Standard sizes Standard sizes (inch) Standard sizes Dimension list
Pumpseal,singlespring,independentfromrotationdirection,
stationaryrubbermanchetteinside.
Application limits (importantreference)
p1 =12bar
t =-30to+200deg.
Dependentfrombellowmaterial
vg =15m/s
Waterpumpseal,independentfromdirectionofrotation,framed
spring,forlimitedspace,shortworkinglength.
Application limits (importantreference)
p1 =6bar
t =-30to+200deg.
Dependentfrombellowmaterial
vg =12m/s
SingleFacesealforsterilapplication,freeofdeadareas,balanced
andindependentfromdirectionofrotation.
Application limits (importantreference)
P1 =20bar
T =-40to+200deg.
Dependentfrombellowmaterial
Vg =15m/s
| 1110 |
Mechanical Face Seals Mechanical Face Seals
Type ADT – 76.57/EB2 Type ADT – 76.58 Type ADT – FAHN 425 STD, Mechanical face seal for steril applications
Shaft diameter d1
Housing diameter D3
Seal width without counter face L3
10 22,50 14,50
12 22,00 8,30
12 25,50 15,00
14 28,50 17,00
15 28,50 17,00
16 28,50 17,00
17 32,00 19,50
18 32,00 19,50
19 36,00 21,50
20 36,00 21,50
22 36,00 21,50
24 41,00 22,50
25 41,00 23,00
28 49,00 26,50
30 49,00 26,50
32 53,50 27,50
33 53,50 27,50
35 57,00 28,50
38 59,00 30,00
40 62,00 30,00
43 65,50 30,00
45 68,00 30,00
48 70,50 30,50
50 74,00 30,50
53 78,50 33,00
55 81,00 35,00
58 85,50 37,00
60 88,50 38,00
65 93,50 40,00
68 96,50 40,00
70 99,50 40,00
75 105,00 40,00
80 110,00 40,00
Shaft diameter d1 inch
Shaft diameter d1
Housing diameter D3
Seal width without counter face L3
3/8" 9,525 20,625 28,575
1/2" 12,700 23,800 28,575
5/8" 15,875 26,970 30,150
3/4" 19,050 30,150 30,150
7/8" 22,225 33,325 34,100
1" 25,400 42,850 36,500
11/8" 28,575 46,025 38,070
11/4" 31,750 49,200 38,070
13/8" 34,925 52,375 39,680
11/2" 38,100 55,550 39,680
15/8" 41,275 63,500 47,625
13/4" 44,450 66,675 47,625
17/8" 47,625 69,850 50,800
2" 50,800 73,025 50,800
Shaft diameter d1
Housing diameter D3
width seal L3 width incl. Counter face L1
6 18 8,5 12,5
8 18 8,5 12,5
8 18 11 15
8 24 11 16,5
9 24 11 16,5
10 24 11 16,5
11 24 11 16,5
12 24 11 18,5
13 24 13 18,5
12 32 13 21
14 28 12,8 20,5
14 32 13 21
15 32 13 21
16 32 13 21
14 35 13 21
15 35 13 21
16 35 13 21
16 39 13 21
17 39 13 21
18 39 13 21
19 39 13 21
20 39 13 21
20 42 13 21
22 42 13 23
24 47 14 24
25 42 14 24
25 47 14 24
28 54 15 25
30 54 15 25
32 54 15 25
35 60 16 26
38 65 18 30
40 65 18 30
45 70 20 32
50 85 23 38
55 85 23 38
60 105 30 45
70 105 32 47
Nominal diam.
d1 d3 d6 d7 d8 d9 lM l1k lM3 l5 l6
018 18 32 27 33 3 M4 32,5 37,5 22,5 2 5020 20 34 29 35 3 M4 32,5 37,5 22,5 2 5022 22 36 31 37 3 M4 32,5 37,5 22,5 2 5023 23 38 33 39 3 M5 35 40 25 2 5025 25 39 34 40 3 M5 35 40 25 2 5028 28 42 37 43 3 M5 37,5 42,5 27,5 2 5030 30 44 39 45 3 M5 37,5 42,5 27,5 2 5032 32 47 42 48 3 M5 37,5 42,5 27,5 2 5033 33 47 42 48 3 M5 37,5 42,5 27,5 2 5035 35 49 44 50 3 M5 37,5 42,5 27,5 2 5038 38 54 49 56 4 M5 40 45 29 2 6040 40 56 51 58 4 M5 40 45 29 2 6043 43 59 54 61 4 M5 40 45 29 2 6045 45 61 56 63 4 M5 40 45 29 2 6048 48 64 59 66 4 M5 40 45 29 2 6050 50 66 62 70 4 M5 42,5 47,5 29,5 2,5 6053 53 69 65 73 4 M5 42,5 47,5 29,5 2,5 6055 55 71 67 75 4 M6 42,5 47,5 29,5 2,5 6058 58 78 70 78 4 M6 47,5 52,5 34,5 2,5 6060 60 80 72 80 4 M6 47,5 52,5 34,5 2,5 6063 63 83 75 83 4 M6 47,5 52,5 34,5 2,5 6065 65 85 77 85 4 M6 47,5 52,5 34,5 2,5 6070 70 90 83 92 4 M6 55 60 40 2,5 7075 75 99 88 97 4 M8 55 60 40 2,5 7080 80 104 95 105 4 M8 55 60 39,3 3 7085 85 109 100 110 4 M8 55 60 39,3 3 7090 90 114 105 115 4 M8 60 65 44,3 3 7095 95 119 110 120 4 M8 60 65 44,3 3 7100 100 124 115 125 4 M8 60 65 44,3 3 7
Metric Metric d1 Metric D2 Metric
d1 10 20 32,50
d1 12 22 32,50
d1 14 24 35,00
d1 16 26 35,00
d1 18 32 37,50
d1 20 34 37,50
d1 22 36 37,50
d1 24 38 40,00
d1 25 39 40,00
d1 28 42 42,50
d1 30 44 42,50
d1 32 46 42,50
d1 35 49 42,50
d1 38 54 45,00
d1 40 56 45,00
d1 45 61 45,00
d1 48 64 45,00
d1 50 66 47,50
d1 55 71 47,50
| 1312 |
Mechanical Face Seals – Types
MechanicalFaceSealType76.53...
MechanicalFaceSealType76.55...
MechanicalFaceSealType76.57...
MechanicalFaceSealType76.62...
Type 76.22 from stainless steel/stainless CI 1.4086–14138/GOETZE-DULENIT/Al2O3
Type 76.24 from stainless steel/stainless CI 1.4086–14138/GOETZE-DULENIT/Al2O3
The seal rotates with the shaft in the pressure chamber irre-
spectiveof thedirectionof rotation,and isunbalanced.With
its totallyencloseddesignandthecompressionspring locatet
outsidethemediumtoberetained,thistypeisfavouredforuse
inapplicationswhereopenspringscanbecomecloggedwithdirt
depositsorwhereeaseofaccessforcleaningthesealingarea
isrequired.
Torquetransmissionbetweensealringandbellowsisprovided
by the bonded stiffening ring and between bellows and shaft
byanenclosedtensionspringring.
This seal is not suitable for retaining grease and oil, since ist
designentailsareductioninthenecessaryforcebetweenshaft
andbellows.
The seal rotates with the shaft in the pressure chamber
irre-spectiveofthedirectionofrotationandthestandardversion
isbalanced.
With its totally closed design and the compression spring
locatedoutsidethemediumtoberetained,thistypeisfavoured
foruseinapplicationswhereopenspringscanbecomeclogged
with dirt deposits or where ease of access for cleaning the
sealingareaisrequired.Thesealisdesignedasathree-partunit.
Torque transmission between shaft and bellow and between
bellow and seal ring is provided by the close coils of the
compression springwhich locatesagainst the seat areas. The
sealisalslot-togetherassembly.Wherehigh-gradefacematerial
combinationsareused,suchasSIC,itispossibletodesignthe
sealringandcounterfaceasidenticalpartswhileretainingthe
housingboreforthecounterface.
The seal rotates with the shaft in the pressure chamber
irre-spective of the direction of rotation, and is unbalanced.
Torquetransmission iseffectedbywayofL-shapedreinforcing
rings and springs,with the result that thebellow is subjected
toonlyslighttorsionalstrain.Thesealisintheformofalslot-
togetherassembly.
Type „S“:Thissealisprimarilyusedforsealingdetergentcirculationpumps
indomesticandindustrialdishwashers.itisproducedinathree-
partslot-togetherdesign.Thesealissecuredinthehousingby
severalcoilsofaspringlocationagainsttheclampingregion,the
sealringbeingheldinplaceinthesamemanner.
Type „W“:Thissealisusedpredominantlyforsealingthedrumofindustrial
aswellasdomesticwashingmachines.Thesealissecuredinthe
housingbyaninlaidL-shapedreinforcingring,whileintheregion
ofthesealringthereisabondedstiffeningring.
Owingtothefrictionalmomentsthatmaybeexpectedtheseal
ring is safeguarded against rotating by recesses in which the
L-sharped reinforcing ringengages.Thewaveform ringsprings
usedprovideforaveryshortfittingdimension.
Both typesarestationary;counter face rotateswith theshaft.
Onthemediumsidethesealsareenclosedandsmooth-faced
inordertopreventbuild-upofremainsoffoodanddetergents.
Type 76.21 from stainless steel/stainless CI 1.4086–1.4138/GOETZE-DULENIT
Counter Face
| 1514 |
Installation Instructions
Operational Charakteristics
Operational Charakteristics
Materials
Installingthefaceseal Axialrun-out
GOETZE-NormDULENIT
Operationallimits
Explanationsonsealing,leakageandwear
Toaccomodatethemechanicalfacesealtheboremustbeclean
andfreeoftransversescores.WerecommendanH8(ISO)class
offit.Thissealisdesignedtobeapressfitinthehousingbore,
thus ensuring a firm and close fit without the need to adopt
additional measures. To facilitate installation and to avoid
damaging the sealing surface, the edge of the housing bore
should be chamfered a surface roughness for the bore of
Rt = 8 -16μm according to DIN 4763. Use mounting tools to
installtheseals.Werecommendmoisteningthesealingsurface
ofthesealwitha1:1water/spiritmixturetoeaseassembly.
Anotherwiseoptimallydesignedandmanufacturedmechanical
facesealcanbegintoleakbecauseofexcessiveaxialrun-outat
the outside diameter of the seal face as a function of speed.
The permissible axial run-out specified does not depend on
thediameterof theseal face,butontheangularvelocity.The
running speed certainly increases as the diameter increases,
but the angular velocity remains constant. The following
relationshipapplies:
b = w2 x Ab = accelerationw = angular velocityA = axial run out
Mechanicalfacesealswithsealfacesmadeofcarbonmaterials
are exclusively used for sealing pumps which do not handle
abrasiveliquids.
Counter faces made from the separate-cast dulenit have prob-
lem particulary successful in such applications. The structure
ofthismaterialisausteniticbecauseofthenickelcontentand
has,consequently,satisfactoryresistancetocorrosion.
Suitablepropertiesareachievedbyaspecialmicrostructure.The
austeniticmatrixcontainingcarbideshasacertainproportionof
graphiteinitwhichensuresgoodslidingproperties.Theadditional
highproportionof chromiumcarbide in network configuration
makes for a high degree of hardness (250 – 350 HB) and is
responsibleforthegoodwearresistanceproperties.
The operational limit of a mechanical face seal is basically
determinedby theproductpi x vg,wherepi is themaximum
operatingpressure inbarsandvg is theperipheralvelocity in
m/s, measured at a point midway between the centre and
peripheryoftherotatingsealface.Theoperationallimitsforpi
andvgvaryaccordingtothevariousmaterialcombinations.
Manyusersandoperatorsofmechanicalfacesealsexpectzero
leakage, or demand a “100% effective seal”. This requirement
isphysicallyimpossible,norisitnecessaryinordertoachieve
a sufficiently long life expectancy. A sealing problem can be
consideredsatisfactorilysolved,ifatechnicallyeffectivesealis
obtained,i.e.ifthesealdoesnotdripleak.
Whenstationary,theflat-lappedsealfacesonlytoucheachother
atcertainpoints.Thesizeofthegapremainingdependsonmode
ofoperation,propertiesofthematerials,contactpressureand
thermaleffects.Evenwith jointpacking, itcanbeshown that
thismicroscopicgapcan leadto leakage. Itcan,therefore,be
assumed that the faces of mechanical seals must also leak,
sincetheyaresubjecttoconsiderablylowersurfacepressures
and have additional hydrostatic and dynamic forces acting
betweenthem.Leakageofthesealedmediumis,therefore,never
equaltozero.Thedeterminationofleakageissimplyaquestion
ofthesensitivityofthemeasuringmethod.
Leakage and wear are the two essential characteristics of a
mechanicalfacesealandareaffectedbythelubricatingfilmin
thesealinggap.Thisphenomenon is similar to the lubrication
mechanismesinmultisurfaceplainbearings,withthedifference
thattheabsoluterisesonthesealfacesofmechanicalsealsare
considerablysmaller.
At least a few gap zones are filled with fluid because of this
lubricatingmechanism.Mechanicalsealsoperate,consequently,
withintheareaofboundaryormixedfriction.Itisass-umedthat
thelawsofhydrodynamiclubricationapplyevenforlubricating
filmsofonlyafewmicrometresthickness.Gapsofthismagnitu-
deshouldalwaysbeconsideredparticularlylargeincomparison
withthemoleculardiametersofnormalsealedfluids.
Thedeformationofthesealfaces,whichiscausedbycompres-
sive forces, thermal effects and wear, forms hydrostatic and
hydrodynamicprofilesatthesealinggap.Underidealconditions,
these provide a noncontacting effect at the sealing interface
togetherwithanarrow, stablegap,which,consequently leads
toleakage.Theleakageisverylow,however,andmanysealed
fluidsareabletoevaporateonthehotsurfaceofthesealring,
becauseofthelowrateofleakagethroughthegap.
Nevertheless,vaporousleakagecancondenseoncoldmachine
parts,possiblycausingdripstoformandgivingtheimpressionof
anunacceptablyhighrateofleakage.Residuesfromthesealed
medium appearing at outlet bores would then encourage the
impressionthatleakagewasexcessive.
It is possible to predetermine the quantity of leakage expec-
ted.However, this can only be done for constant operating
conditions, because the gap form changes with every change
inpressure,speedortemperature.Itshouldbenotedthatme-
chanicalfacesealscannotgivecompletefreedomfromleakage.
Topreventtheescapeofpollutantswhendealingwithenviron-
mentally dangerousmedia, variouspracticalmeasures canbe
adopted,e.g.doublesealarrangementswithneutralbufferfluids
topreventtheescapepollutants.
SiliconinfiltratedorreactionsinteredSiC
Mechanicalproperties/physicalpropertiesofreactionsinteredSiC:
Density: 2,7g/cm3
Porosity: 16%
Bendingstrength: 250MN/m2
Modulofelasticity: 360x103MN/m2
is a composite of SiC and metallic silicon. To produce this
material a porous parent substance consisting of SiC and
carbon is infiltrated with silicon at high temperature. The
carbone present in the substance reacts with Si to form
SiC. In order to obtain impervious materials, a surplus of
silicon must be used in the manufacturing process, with
the result that commercial products have a free silicon
content of some 6 to 15% by volume, though up to 30% is
possible. By employing the technique of infiltration it is
possible to produce homogeneous substances which come
closetothematerialpropertiesofpureSiC.Thebestqualities
ofthismaterialgroup inrelativetermsareobtainedwith thin-
walles parts. The production of thick-walles components is
usuallyassociatedwitha lossofquality,sinceproblemsare
encountedinuniforminfiltrationofthickwalls(20mm).
InstallingthecounterfaceAllsharpedgesshouldberounded-offtopreventdamagetothe
O-ringduring installationandoperation.Tofacilitateassembly,
werecommendmoisteningtheoutsideoftheo-ringwitha1:1
mixtureofwateranddenaturedalcohol.Toensureanefficient
transferoftorque,thehousingboreortheO-ringshouldbefree
ofoilorgrease.Takecarethatthecounterfacesitsproperlyin
thehousingbore,
toprovidesatisfactorycontactattheinterface.
| 1716 |
Resin-bondedcarbongraphite
Cementedcarbide
Thebasematerialof the resign-bondedcarbongraphite is the
sameasforcarbongraphite,butcarbonsolidsofthistypeare
bondedwithsyntheticresinsandmanufacturedbythehot-press
method.For resinbondedcarbongraphite thebindingagent is
notcarbonized,thusdispensingwiththeneedtoimpregnate.To
improve thermalconductivity,metalpowderscanbeadded to
resin-bondedcarbongraphites.
Resin-bonded carbon graphites have less thermal resistance
thancarbongraphites–incontinousoperationupto150deg.;
forshortperiods200deg.-300deg.ispermissible.Resin-bonded
gradesofcarbonaremoresensitivetosuddenlargetemperature
changes.
Cementedcarbidesdifferaccordingtothehardmaterialused,
forexampletungstencarbide,titaniumcarbide,tantalumcarideand
others.Themostcommoncementedcarcideusedinmechanical
facesealsistungstencarbidewithcobaltasbindingagent.
Cementedcarbide isused for theseal facesofbothseal ring
and counter face in mechanical seals which seal liquids con-
taining abrasive solid particles. The cemented carbide rings
are either pressed into the parts or brazed on. The special
characteristics of the cemented carbide/cemented carbide
combinationareoptimumwearresistance,adequateresistance
tocorrosionandgood thermal conductivity. In addition, the lu-
bricatingeffectof thesealedmediumwiththiscombination is
sufficient to avoid scuffing at the seal faces. The additional
lubrication which is otherwise necessary with metallic sealing
materialcombinationscanbedispensedwith.
SiliconizedgraphiteSealing face and counter face for mechanical face seals are
produced from pre-machined carbon rings by reaction with
a silicon oxide atmosphere while exposed to a temperature of
1900 deg.–2800 deg., whereupon they change reaction from
SiO+2CpSiC+CO.
The silicon oxide vapour diffuses into the pores of the carbon
ringandreactswiththecarbon.Thethicknessofthesiliconized
layerisinfluencedbythetypeofgraphiteusedandthereaction
conditions.Usuallya layer thicknessof0.6–1mm is sufficient.
Since rings in this formarenot impervious, thepore volume is
filled up by suitable impregnation agents and thereby sealed.
Partsmadefromsiliconizedgraphiteareresistanttomostmedia
and therefore have considerable advantages over tungsten
carbideandaluminiumoxide.Thismaterialisnotsuitablefordry
operatingconditions.
Mechanical properties:Hardness: 80HRA
Compressivestrength: 80MPa
Modulusofelasticity: 16000MPa
Bendingstrength: 34MPa
Itisparticularyimportanttoprotectthehighlysensitive,lappedseal
facesfromanykindofdamageorcontamination.Otherwisetheseal
maynotfunctionproperlyinoperation.Werecommendwipingtheseal
faceswithaleatherclothjustbeforeinstallation.
InstallingthecounterfaceTopreventmechanicaldamagetotheO-ringduringinstallationor
operation,alledgesmustberounded-offinaccordancewiththe
listofdimensions.Tofacilitateinstallation,werecommendmois-
teningtheoutsidediameteroftheO-ringwitha1:1water/spirit
mixture. To ensure an efficient transfer of torque the housing
bore or O-ring should be free of oil or grease. When pushing
thefragilecarbonorceramiccounterfaceontotheshaft,take
particularcaretoapplypressureuniformly.Careshouldbetaken
toinstallthecounterfaceproperlyinthehousingboreinorderto
providesatisfactoryalignmentattheinterface.
InstallingthefacesealEndsofshaftsandshaftshoulders thatpass through theseal
should be sufficiently rounded-off or chamfered to avoid
damaging the O-ring and facilitate installation. If this in not
possible, we recommenced using a conical shrunk-on sleeve.
Threaded shafts should be designed so that there is enough
clearancebetweenthethreadandtheO-ringtopushtheseal
ontotheshaft.Shaftsmustbefreeofscoresandscratchesand
shouldbelightlyoiledbeforeassemblingtheseal.
Material Code
MaterialCodeMechanicalSealsDIN24960
Face materials
Synthetic carbonsA =carbon,antimonyimpregnated
B =carbon,resinimpregnated
C =electrographitewithoutimpregnation
C1=electrographite,antimonyimpregnated
MetalsE =Cr-steel
G =CrNiMo-steel
K =metallichardmetalcoat
(CrNiMo-steelstellited)
M =HastelloyC4
M1=HastelloyB
S =Cr-cast
Carbides(tungstencarbideU,siliconcarbideQ,
othercarbidesJ)
U1=tungstencarbides,Co-bound
U2=tungstencarbides,Ni-bound
U3=tungstencarbides,CrNiMo-bound
Q1=S-SiC
Q2=Si-SiC
Q3=SIC-C-Si,compoundmaterial
Q4=C-SiC,surfacesilicated
J =othercarbides
Metal oxides(ceramics)
V =Al2O
3
W =CrO3
X =othermetaloxides
Plastics(PTFE,reomforcedY,
otherplasitcmaterialsZ)
Y1 =PTFE,glas-fibrereinforced
Y2 =PTFE,carbon-reinoforced
Z =otherplastics
Material for secondary seals
Elastomeresnotcoated
E =ethylene-prophylene
K =perfluor-rubber
N =chloroprene-rubber
P =nitril-rubber
S =silicone-rubber
V =fluorine-rubber
X =otherelastomeres
Elastomerescoated
M =FPMwithdoublePTFEcoating
M2=EPDMwithdoublePTFEcoating
M5=FPMFEP-coated
M6=VQMFEP-coated
Non-elastomeresT =PTFE
F =flatgasket(asbestos-free)
Y =othernon-elastomeres
Different materialsU =differentmaterialsforsecondaryseals
Material for spring Materialsfor otherconstructional partsD =C-steel
E =Cr-steel
F =CrNi-steel
G =CrNiMo-Steel
M =HastelloyC4
M1=HastelloyB
T =othermaterials
CarbongraphiteBecauseof themanufacturingprocessused,carbongraphite is
similar to ceramic materials and is porous. It has a porosity of
about20-30%.Thisconsistsoftheprimaryporesinthecokeand
thesecondarypores,whichappearduringthecarbonisationofthe
bindingagents.
Manyoftheporesareboundtogether.Partsmadefromcarbon
graphiteare,therefore,pervioustogasesandfluides.Byimpreg-
natingwithresinsormetals,gas-tightandleak-proofmaterialscan
beproducedwithoutlosingthegoodslidingproperties.
Therangeofthermalapplicationislimitedbytheinstabilityofthe
caboninanoxidisingatmosphere.Themax.permissibleworking
temperaturesforpartsmadeformcarbongraphiteare:
p inair400deg.
p insteam650deg.
p incarbondioxide1000deg.
For impregnated grades, these limits are correspondinly fixed
by themeltingordecomposition temperaturesof themetalsor
resinsused.
The good resistance to temperature fluctuation can be explai-
nedbythelowmodulsofelasticity,thelowcoefficientofthermal
expansion and the relatively high heat-transfer coefficient. In
partsmadefromcarbongraphite,therefore,considerablyhigher
temperaturegradientsmaybetoleratedthanwithmetalsorother
ceramicsubstances(e.g.mataloxides).
Materials Materials
Art. nbr. Seal type Material Dimensions
6734120699 76.12-0300RK NB6021 6,00x14,00x10,00
6734115799 76.53-0100K NB6022 6,00x18,00x10,00
6734150999 76.53-14900K FP6825 6,00x18,20x10,00
6734140499 76.12-0500LK NB6022 6,50x14,50x12,00
6734107699 76.53-0200K NB6022 10,00x24,00x19,00
6734161899 76.62-13300K NB6022 10,60x30,00x15,00
6734118399 76.17-0200RK NB6022 12,00x23,00x17,00
6734146999 76.12-8100LK NB6022 12,00x22,00x17,00
6734103499 76.12-0800RK NB6022 12,00x22,40x17,00
6734114699 76.12-3100RK NB6022 12,00x25,50x31,00
6734139499 76.12-8400RK FP7021/K-Geh. 12,00x25,50x31,00
6734122299 76.53-0300K NB6022 12,00x26,00x16,00
6734139199 76.69-51400K NB6022 12,00x30,00x15,00
6734158299 76.68-0100K NB6022 12,80x26,00x14,00
6734107199 76.71-1100K NB6022 13,50x28,00x13,00
6734136999 76.12-6300LK NB6022 14,00x25,00x15,00
6734140999 76.12-6300RK NB6022 14,00x25,00x15,00
6734110099 76.12-0900RK NB6022 14,00x25,00x17,00
6734142099 76.12-9700RK NB6022 14,00x25,00x17,00
6734116099 76.53-0400K NB6022 14,00x28,00x16,00
6734102499 76.68-0300K NB6022 14,00x30,00x15,00
6734136499 76.62-6100K NB7021 14,60x30,00x17,50
6734129199 76.14-0400RK NB6022 15,00x23,00x25,00
6734137399 76.12-6400LK NB6022 15,00x26,00x14,00
6734138999 76.12-6400RK NB6022 15,00x26,00x14,00
6734100599 76.12-1100RK NB6022 15,00x27,00x17,00
6734113999 76.12-1100LK NB6022 15,00x27,00x17,00
6734146299 76.12-3600RK NB6022 15,00x27,00x17,00
6734100799 76.53-0500K NB6022 15,00x30,00x16,00
6734131499 76.53-7700K NB6022 15,00x30,00x16,00
6734156199 76.55-15VSBV FP6825 15,00x30,60x20,00
6734136699 76.68-9100K NB6022 15,80x35,00x17,50
6734106099 76.14-0500RK NB6022 16,00x24,00x27,00
6734119399 76.12-1200RK FP6825 16,00x27,00x19,00
6734107799 76.53-0600K NB6022 16,50x33,00x18,00
6734144799 76.60-4100K NB6022 16,50x30,00x15,50
6734139799 76.12-8700RK NB6022 17,00x28,00x19,00
6734118699 76.68-0500K NB6022 17,00x35,00x16,00
6734139899 76.68-12100K NB6022 17,00x36,45/41,5x16,25
6734145099 76.68-5600K NB6022 17,00x36,80/39,0x15,75
6734115499 76.14-0700RK NB6022 18,00x26,00x20,00
6734103699 76.12-1400RK NB6022 18,00x30,00x20,00
6734127299 76.12-1400LK NB6022 18,00x30,00x20,00
6734155799 76.55-1800K NB6022 18,00x34,00x18,00
6734100699 76.53-0800K NB6022 18,00x36,00x18,00
6734108699 76.53-4900K NB6022 18,00x36,00x18,00
6734140699 76.53-10500K EP7012 18,00/22,0x40,00x22,00
6734134399 76.53-8300K NB6022 18,00x40,00x22,00
6734145999 76.53-13600K NB6022 18,00x40,00x26,00
6734106199 76.14-0800RK NB6022 20,00x29,00x22,00
6734103599 76.12-1500RK NB6022 20,00x32,00x22,00
6734128899 76.12-1500LK NB6022 20,00x32,00x22,00
6734122599 76.17-2600RK NB6022 20,00x35,00x40,00
18 | |19
Mechanical Face Seals Mechanical Face Seals
Art. nbr. Seal type Material Dimensions
6734102099 76.53-0900K NB6022 20,00x38,00x18,00
6734133399 76.53-7900K NB6022 20,00x38,00x18,00
6734123099 76.12-4500RK NB6022 20,50x33,50x30,70
6734116599 76.68-2700K NB6022 21,00x40,00/44,0x17,00
6734113699 76.12-1600RK NB6022 22,00x35,00x20,00
6734101599 76.53-1000K NB6022 22,00x40,00x20,00
6734140599 76.53-10600K EP7021 22,00x40,00x20,00
6734143299 76.51-3000K FP7024 22,00x40,00x20,00
6734107299 76.53-3400K NB6022 22,00x40,00x22,00
6734127499 76.53-6200K NB6022 22,00x40,00x24,00
6734109499 76.66-0800K NB6022 22,00x42,00x21,00
6734102899 76.54-1300K NB6022 22,00x45,00x26,00
6734133299 76.53-8000KEP EP7021 22,00x50,00x24,00
6734145699 76.53-14100K NB6022 22,00x55,00x24,00
6734115399 76.14-1000LK NB6022 24,00x33,00x37,00
6734107599 76.53-1100K NB6022 24,00x43,00x20,00
7634105799 76.12-1800LK NB6022 25,00x40,00x26,00
6734113499 76.12-1800RK NB6022 25,00x40,00x26,00
6734101099 76.53-1200K NB6022 25,00x44,00x20,00
6734144899 76.53-1200-32934 NB6022 25,00x44,00x20,00
6734124999 76.53-2700K NB6022 25,00x44,00x24,00
6734123499 76.60-4300K NB6022 26,00x45,00x18,00
6734109399 76.12-3500RK NB6022 28,00x43,00x27,00
6734124699 76.12-2000RK NB6022 28,00x43,00x27,00
6734103299 76.53-1400K NB6022 28,00x47,00x22,00
6734108499 76.53-2800K NB6022 28,00x47,00x22,00
6734153799 76.53-17300K NB6022 28,00x47,00x22,00
6734114299 76.53-11800K NB6022 28,00x47,00x22,00
6734132199 76.14-1400LK NB6022 30,00x43,00x42,00
6734115199 76.14-1400RK NB6022 30,00x43,00x42,00
6734115299 76.14-1000RK NB6022 30,00x43,00x42,00
6734101399 76.12-2100LK NB6022 30,00x47,00x28,00
6734113399 76.12-2100RK NB6022 30,00x47,00x28,00
6734156299 76.53-1500K FP7024 30,00x50,00x22,00
6734103399 76.53-1500K NB6022 30,00x50,00x22,00
6734106999 76.53-1500AK NB6022 30,00x50,00x22,00
6734108799 76.53-1600K FP7024 30,00x50,00x22,00
6734127699 76.53-6300K NB6022 30,00x50,00x26,00
6734146399 76.53-13200K NB6022 30,00x56,70x28,00
6734119799 76.60-1800K NB6022 31,00x52,70x19,10
6734141099 76.53-5900K NB6022 32,00x53,00x26,00
6734121199 76.62-4400K NB6022 32,00x57,00x16,00
6734148799 76.12-U-035R NB6022 35,00x49,00x32,00
6734118299 76.12-2300LK NB6022 35,00x52,50x32,00
6734113099 76.12-2300RK NB6022 35,00x52,50x32,00
6734109199 76.12-3800RK NB6022 35,00x52,50x32,00
6734146099 76.12-1300RK NB6022 35,00x52,50x32,00
6734103899 76.53-1700K NB6022 35,00x56,50x26,00
6734122499 76.53-5600K NB6022 35,00x56,50x26,00
6734127799 76.53-6400K EP7021 35,00x56,50x26,00
6734137799 76.53-10100K NB6022 35,00x56,50x26,00
6734136399 76.53-3000K NB6022 35,00x56,00x30,00
6734112799 76.60-1900K NB6022 36,05x58,30x18,00
Art. nbr. Seal type Material Dimensions
6734102399 76.62-0900K NB6022 37,00x62,00x12,00
6734126099 76.12-2400RK NB6022 38,00x56,00x35,00
6734100999 76.53-1800K NB6022 38,00x59,00x26,00
6734138299 76.53-10300K NB6022 38,00x59,00x30,00
6734114299 76.12-2500LK NB6022 40,00x58,00x38,00
6734145799 76.12-2500RK NB6022 40,00x58,00x38,00
6734101999 76.53-1900K NB6022 40,00x61,00x26,00
6734137499 76.53-9900K NB6022 40,00x61,00x26,00
6734145899 76.53-12500K FP7501 40,00x61,00x26,00
6734143799 76.62-8000K NB6022 41,50x68,40x12,00
6734110199 76.70-1300K NB6022 42,00x65,00x22,00
6734141899 76.62-7500K EP7021 42,00x68,40x12,00
6734107999 76.53-2100K NB6022 45,00x73,00x26,00
6734126899 76.53-6100K NB6022 45,00x73,00x26,00
6734118499 76.60-2300K NB6022 46,00x75,50x21,00
6734118899 76.62-1100K NB6022 46,80x75,00x12,00
6734129499 76.53-3800K FP7024 50,00x78,00x25,00
6734102999 76.53-2200K NB6022 50,00x78,00x26,00
6734129499 76.53-6800K EP7021 50,00x78,00x26,00
6734118999 76.60-2500K NB6022 50,00x78,30x18,00
6734141499 76.62-7400K NB6022 52,00x80,00x13,00
6734111499 76.62-1300K EP7021 52,00x80,00x13,00
6734112299 76.60-2700K NB6022 58,00x88,30x18,00
6734131999 76.62-5400K NB6022 58,00x90,00x14,00
6734152399 76.62-5400K NB6022 58,00x90,00x14,00
6734111199 76.61-1700K NB6022 60,00x88,00x18,00
6734146699 76.62-9200K NB6022 60,00x88,00x18,00
6734162399 76.62-9200K EP7021 60,00x88,00x18,00
6734140899 76.53-9200K NB6022 65,00x95,00x30,00
6734134199 76.62-5600K NB6022 68,00x100,00x16,00
6734108299 76.53-2300K NB6022 70,00x100,00x30,00
6734112699 76.60-3000K NB6022 72,00x105,50x23,00
6734111999 76.60-3200K NB6022 76,00x105,50x25,00
6734113899 76.61-1800K NB6022 80,00x115,00x20,00
6734112699 76.60-3300K NB6022 82,00x120,00x23,00
6734117399 76.61-1900K NB6022 92,00x130,00x20,00
6734129599 76.62-5000K NB6022 92,00x130,00x20,00
6734162199 76.62-6000K EP7021 92,00x130,00x20,00
6734129699 76.62-5100K NB6022 112,00x145,00x23,00
6734112499 76.60-3700K NB6022 122,00x158,60x25,00
6734112599 76.60-3800K NB6022 144,20x190,60x25,00 They here performed construction forms and dimensions
are only a small part of our complete delivery program and
please note they are not permanent on stock. Kindly inquire
alsodifferingTypesandmeasurementsbasical!
Formistakesor losts,whichcanhavehappenedeven inspite
of best care,ADITECcannot getmade liable for.Same is valid
for technical variants because of technical changes and/or
supplements.Incaseofquestions,pleasecontactADITECTechnic
Overviewofsizes(sortedbyshaftdia) Overviewofsizes(sortedbyshaftdia)
www.aditec-technologie.de
OurfivemanufacturingcompanieswithintheKünemundGroup
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