Inner Values Perfectly Sealed - ExistADITEC GmbH is a Künemund Group company, with its headquarters in Engstingen-Haid. The company combines the development and production ... 19

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


Counterface: typicaltype76.21-/76.22-/76.24-


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


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


d1 =6to70mm

p1 =8barmax.

t =-20to+180deg.

vg =15m/s


Counterface: typicaltype76.21-/76.22-/76.24-


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.


p1 =12bar

t =-30to+200deg.

vg =10m/s

Standard sizes Standard sizes (inch) Standard sizes Dimension list

Pumpseal,singlespring,independentfromrotationdirection,

stationaryrubbermanchetteinside.


p1 =12bar

t =-30to+200deg.

Dependentfrombellowmaterial

vg =15m/s

Waterpumpseal,independentfromdirectionofrotation,framed

spring,forlimitedspace,shortworkinglength.


p1 =6bar

t =-30to+200deg.


vg =12m/s

SingleFacesealforsterilapplication,freeofdeadareas,balanced

andindependentfromdirectionofrotation.


P1 =20bar

T =-40to+200deg.


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...




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


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


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

ADITECGmbH

Dietrich-Bonhoeffer-Strasse8|D-72829Engstingen-HaidPhone+497129936759-0|[email protected]

Yourcontacttoourtradingenterprises(forconsultationandorders)

Compound GmbHHochtemperatur WälzlagerMax-Planck-Strasse6D-77694KehlamRhein

Künemund Dichtungstechnik GmbHLenenweg8D-47918Tönisvorst

Ritter Lineartechnik GmbHImEttenbach5D-77767Appenweier-Urloffen

Zwicker Kugellager GmbHEmmingerStrasse3D-94508Schöllnach

ADITEC GmbHDietrich-Bonhoeffer-Strasse8D-72829Engstingen-HaidPhone+497129936759-0Fax+497129936759-20info@aditec-technologie.de

Künemund GmbH Max-Planck-Strasse6D-77694KehlamRheinPhone+4978518702-0Fax+49785173382info@kuenemund.com

Künemund GmbH & Co. KGSchockenriedstrasse46AD-70565StuttgartPhone+4971172587-0Fax+4971172587-50vertrieb@kuenemund.net

Künemund Düsseldorf GmbHBonnerStrasse373D-40589DüsseldorfPhone+49211879644-0Fax+49211879644-10duesseldorf@kuenemund.de

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