SKF Industrial seals

1 Product overviewSKF Industrial seals Copyright SKF 2005 Every care has been taken to ensure the accuracy of the information contained in this publication but no liability can be accepted for any loss or damage whether direct, indirect or consequential arising out of the use of the information contained Publication 5244E/IISKF and the SKF logo are trademarks of the SKF Group and are registered in certain in Germany on environmentally friendly, chlorine-free overview32 Nearly 100 years of experience and theresulting knowledge that has beenaccumulated through its own research,and through development of value pro-positions for its customers in a broadrange of industries, have established theSKF Group as a leader in its field. Thisleadership extends far beyond bearingsand SKF is focused on five platformsthat cover its technical knowledge andcapabilities.

2 The five platforms include:Bearings and units, seals , Mechatronics,Services and Lubrication Services. SKFutilizes the capabilities of all these plat-forms to offer its customers a tailor-made proposition that will, in turn,strengthen their offer to their customersor that would make their own produc-tion more effective. Whether reducingenergy consumption or the need forlubricants, SKF innovative solutions canhelp safeguard earth s limited resourcesfor future Group has a global ISO 14001environmental certification. Individualdivisions have been approved for qualitycertification in accordance with eitherISO 9000 or QS 9000. Some 80manufacturing sites worldwide andsales companies in 70 countries makeSKF a truly international corporation.

3 In addition, our 7 000 distributors anddealer partners around the world, thee-business marketplace and globaldistribution system put SKF close tocustomers for the supply of both pro-ducts and services. In essence, SKFsolutions are available wherever andwhenever our customers need , the SKF brand now stands formore than ever before. It stands for theknowledge engineering company readyto serve you with world-class productcompetencies, intellectual resources andthe vision to help you and sealing technology are essen-tial parts of the capabilities of from SKF stand for excellence and leadership and symbolize consistentendeavour to achieve total quality in allprocesses and imply three main benefitsfor our customers:Reliability thanks to modern, efficientproducts, based on worldwide applica-tion know-how, optimized materials,forward-looking designs and the mostadvanced production techniques.

4 Market lead an advantage of ourproducts and services. Our customersincrease operating time, reduce down-time, and improve output and productquality. Cost effectiveness resulting from thefavourable ratio between our productquality plus service facilities and thepurchase price of the publication is aimed to provide anoverview of the SKF seals , their designcharacteristics and their suitability fordifferent application conditions. It pre-sents the SKF product range of seals ,which is available throughout the matter what your requirements are,SKF can help you get exactly the rightsealing arrangement for your you are welcome to share the SKFexpertise in sealing technology. This publication is designed to enablethe information regarding a particularproduct to be quickly and easily contents are divided into the fivesectionsRadial shaft sealsWear sleevesAxial shaft sealsHydraulic sealsStatic sealsAll products are listed with a brief description informing about design andproperties.

5 Detailed information on SKFseals can be found in the cataloguesSKF Industrial shaft seals SKF Hydraulic seals which are available from your local SKFrepresentative. In addition the SKFapplication engineering services canprovide support when designing a sealing knowledge engineering company54 Product overviewContentsSKF Industrial seals product structureRadial shaft seals6 Sealing lip material overview8 Small diameter radial shaft seals 10 seals of nitrile or fluoro rubber12 seals of PTFE materials16 Selection factor matrix14 Large diameter radial shaft seals 20 seals with metal case24 Fabric-reinforced seals25 Steel-reinforced seals26 All-rubber seals27 Permissible operating conditions28 Cassette seals and shaft sealing units32 Other SKF radial shaft seal designs36 Wear sleeves 40 Axial shaft seals42V-ring seals44

6 Metal-clad V-type sealing rings and axial clamp seals46 Mechanical seals47 Hydraulic seals48 Material overview50 Piston seals52 Selection matrix64 Rod seals66 Selection matrix78 Wiper seals80 Selection matrix90 Guides92 Static seals94 Product index98 Hydraulic sealsWiper sealsGuide ringsand stripsPneumaticsealsPiston sealsor pistonunitsPiston sealsRod sealsRod sealsRod seals /Wiper unitsWiper sealsGuide ringsand stripsCushionsealsDiaphragmsBellowsRadia l shaftsealsSmall diameterradial shaftseals (SDS)Large diameterradial shaftseals (LDS)CassettesealsAxial shaftsealsV-ring sealsMechanicalsealsLabyrinthsealsSKF Sealingsystems and sealingsolutionsSeal units with bear-ings orotherengineered componentsProfiledsealsFlat sealsGaskets,washersand otherflat sealsSeals forreciprocatingcomponentsSeals forrotating componentsDynamic applicationsStatic applicationsSeals forstationary surfaces= Covered in this brochure.

7 For all other products, please contactyour SKF representative for further forspecial sealingarrangementsSpecial applicationsContacting sealsNon-contacting seals Pulsating movementsStroking movementsO-rings andothermoulded,profiledseals7 Product overviewWhenever a shaft rotates, it needs a bearing arrangement for smooth and effectiveoperation. Wherever there is a bearing , you will always find a seal helping it toreach its maximum service life and reliability. The most common types of seals usedin bearing arrangements, are radial shaft seals for use in general Industrial applica-tions with shaft diameters up to 200 mm or 8 inch respectively. The large diameterseals, for shaft diameters above 200 mm, provide special features and are intendedfor use in heavy and large-size engineering applications, which require either verylarge or specially designed seals .

8 In general terms, a radial shaft seal is a barrierwith four main functions:6a: Radial shaft sealb: Shaftc: Bearingd: Lubricantdcba1: Retaining the lubricant2: Separating twodifferent media3: Sealing underpressure4: Excluding dirtand moistureOn the following pages, the standard range of our radial shaft seals is presented, with a short description of the main features for each seal type and design andrecommendations regarding selection and application. Obviously, in this publication, it is not possible to cover all the technical aspects sufficiently for all individual application requirements. Therefore, reference should be made in general to the catalogue SKF Industrial shaft seals , where comprehensive, technical data for eachtype and design can be found.

9 For information about availability and delivery time forthe assortment of SKF radial shaft seals , please contact your nearest SKF represen-tative or authorized shaft sealsCRW198In addition to seal design, the sealing lip material significantly contributes to sealperformance and reliability. To cater for the different demands of applications, SKFseals are produced in a variety of sealing lip materials, see list below. These materialshave characteristics, individual properties, making them particularly suitable forspecific about physical properties and the chemical resistance of the seal materials to various media encountered in operation will be found in the section Chemicalresistance in the catalogue SKF Industrial shaft seals .

10 Codes are used to identify the sealing lip material of SKF seals and are listed in thetable below. The codes also appear in the designations of the radial shaft seals . Forseals produced in a combination of materials, a combination of the code letters isused, RV (nitrile rubber with fluoro rubber).Product overviewAcrylonitrile-butadiene rubberR NBR-50 to +100 C (-60 to +210 F)(nitrile rubber) Hydrogenated acrylonitrile- HHNBR-30 to +150 C (-20 to +300 F)butadiene (Duratemp) rubberCarboxylic-acrylonitrile-butadiene DXNBR-50 to +100 C (-60 to +210 F)rubber (Duralip)Fluoro rubber (LongLife)VFKM-40 to +200 C (-40 to +390 F)PolytetrafluoroethyleneTPTFE-200 to +260 C (-330 to +500 F)SKF sealing lip materialsComposition of basic materialDesignation according toNominal operating temperature rangeSKFIS0 / ASTM Radial shaft sealsSealing lip material overviewHDL, HMS5 RG, CRW1, CRWHA1, RDD13 Product overviewRadial shaft sealsSmall diameterradial shaft seals HMS51110 SKF small diameter radial shaft seals constitute the most common seals and normally fit shaft diameters ranging from 3 to 200 mm or 0,125 to 8 inch respectively.