Rotary Seal Design Guide - Seals Unlimited

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11Catalog EPS 5350/USAIntroductionV-Seal used to protect primary oilseal from excessive contaminationOpposed dual spring-loaded lips forseparation of two fluidsMulti-lip FlexiCase design for sealinghigh pressure and excluding dustFlexiSeal used in tank cleanerslow speed, 1000 psiFlexiCase in gas turbine engine sumpfor high speed, 15,000 sfpmFlexiLip in air conditioning compressor260 sfpm, 20 - 300 psiFlexiCase in refrigerant recovery system, 300 psi03/28/061-10 Parker Hannifin CorporationEPS DivisionToll Free: (800) 233-3900www.parkerseals.com
EngineeringContentsRotary Shaft SealsWhat Is the Purpose of a Seal? . . 2-1History of Shaft Seals . . . . . . . . . . 2-2How Do They Work?. . . . . . . . . . . 2-3Seal Components . . . . . . . . . . . . . 2-4Lubricant Considerations . . . . . . . 2-6Shaft Considerations . . . . . . . . . . 2-6Testing for Machine Lead . . . . . . . 2-7Shaft Tolerances. . . . . . . . . . . . . . 2-8Underlip Operating Temperature. . 2-8Seal Torque . . . . . . . . . . . . . . . . . 2-9Internal Pressure . . . . . . . . . . . . . 2-10Shaft Speed . . . . . . . . . . . . . . . . . 2-10Housing/Bore Considerations . . . . 2-11Shaft to Bore Misalignment. . . . . . 2-11Shaft Runout . . . . . . . . . . . . . . . . 2-12Shaft Seal Summary. . . . . . . . . . . 2-12Shaft Seal Installation. . . . . . . . . . 2-12Handling and Storage . . . . . . . . . . 2-14PTFE Shaft SealsHow Do I Choose the Right Profilefor My Application? . . . . . . . . . . . . 2-15Spring Designs . . . . . . . . . . . . . . . 2-16Lip Shapes . . . . . . . . . . . . . . . . . . 2-20Shaft Considerations . . . . . . . . . . 2-21Housing/Bore Considerations . . . . 2-22Pressure and Shaft Velocity . . . . . 2-23Lubrication . . . . . . . . . . . . . . . . . . 2-24Rotary PTFE Product Choice . . . . 2-24Shaft Misalignment and Runout . . 2-25Rotary PTFE SealConsiderations . . . . . . . . . . . . . . . 2-26Alternate HousingConfigurations . . . . . . . . . . . . . . . 2-26Bearing IsolatorsGeneral Theory of Operation . . . . 2-27Testing and Validation . . . . . . . 2-30Rotary Shaft SealsWhat Is the Purpose of a Seal?Catalog EPS 5350/USAToday there is a wide selection of designs available foruse in rotary applications. They range from the traditionalsingle and double lip elastomeric configurations to PTFEbaseddesigns. Even more complex designs incorporatemultiple lips, differing materials and hybrid labyrinth designs.The purpose of this reference guide is to assist engineersand maintenance professionals in selecting the best designfor a specific application based on service life requirementsand cost objectives.One of the most common purposes of a lip seal is toprotect the bearing that is used to support a shaft in a rotatingapplication. Retaining the bearing lubricant and keeping itclean ensures maximum bearing life and increases the overallservice life of the equipment. Such applications includeautomotive wheels, electric motors, pumps, gearboxes andlarge rolls used in steel and paper manufacturing.Radial lip seals are used throughout industries in a varietyof other applications under a wide range of operatingconditions. These conditions can vary from high-speed shaftrotation with light oil mist to low speed reciprocating shaft inmuddy environments. Radial lip seals can be found sealinglube oil in high speed crankshaft applications for gasoline anddiesel engines that operate from the tropics to the arctic, insubmarines, oil tankers, spacecraft, windmills, steel mills,paper mills, refineries, farm tractors, appliances andautomobiles. In fact, they can be found in anything that has arotating shaft.Parker rotary shaft seals retain lubricationand exclude contaminants even in the mostextreme environments.03/28/06222-1 Parker Hannifin CorporationEPS DivisionToll Free: (800) 233-3900www.parkerseals.com
Page 1 and 2: Rotary Seal DesignGuideCatalog EPS
Page 3 and 4: Rotary SealDesign GuideTable of Con
Page 5 and 6: IntroductionCatalog EPS 5350/USA11T
Page 7 and 8: Seal Decision TreeOil Retention, Sh
Page 9 and 10: Clipper Oil Seal and Parker Oil Sea
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Page 13: Sealing SystemsThe completeness of
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Page 41 and 42: Catalog EPS 5350/USAEngineeringBear
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Page 45 and 46: MaterialsMaterials ExcellenceParker
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Page 49 and 50: Product OfferingCatalog EPS 5350/US
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Catalog EPS 5350/USAProduct Offerin
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Clipper ® Oil SealsIntroductionCon
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Clipper ® Oil SealsEngineeringShaf
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Clipper ® Oil SealsCatalog EPS 535
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Clipper ® Oil SealsProduct Offerin
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Clipper ® Oil SealsLUPW, LPDW, LDS
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Clipper ® Oil SealsOL ProfileCatal
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Clipper ® Oil SealsTSS ProfileCata
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Clipper ® Oil SealsRPDT ProfileCat
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Clipper ® Oil SealsSS, SDS Profile
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Clipper ® Oil SealsTMAL, TMAS Prof
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Clipper ® Oil SealsRUP, RPD Profil
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Parker Oil SealsIntroductionContent
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Parker Oil SealsCatalog EPS 5350/US
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Parker Oil SealsMaterialsCommon Mat
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Parker Oil SealsProduct OfferingPar
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Parker Oil SealsSpringless Grease R
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Parker Oil SealsMedium Pressure Pro
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Parker Oil SealsHigh Eccentricity S
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Parker Oil SealsPTFE/Elastomer Prof
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Shaft SleevesIntroductionContentsEn
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Shaft SleevesMaterialsCommon Materi
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ProTech Bearing IsolatorsIntroduct
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ProTech Bearing IsolatorsCatalog EP
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ProTech Bearing IsolatorsEngineeri
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ProTech Bearing IsolatorsLN Profil
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ProTech Bearing IsolatorsLW Profil
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ProTech Bearing IsolatorsSL Profil
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ProTech Bearing IsolatorsML Profil
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ProTech Bearing IsolatorsFS-360 Pr
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FlexiLip IntroductionContentsEngine
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FlexiLip EngineeringCatalog EPS 535
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FlexiLipCatalog EPS 5350/USAEnginee
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FlexiLipCatalog EPS 5350/USAMateria
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FlexiLip Product OfferingThe key ap
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FlexiLipCatalog EPS 5350/USAProduct
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FlexiCase IntroductionContentsEngin
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FlexiCase EngineeringChoosing the R
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FlexiCaseCatalog EPS 5350/USAEngine
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FlexiCase Product OfferingCatalog E
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FlexiCaseCatalog EPS 5350/USAProduc
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FlexiSeal ® RotaryIntroductionCont
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FlexiSeal ® RotaryCatalog EPS 5350
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FlexiSeal ® RotaryProduct Offering
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FlexiSeal ® RotaryCatalog EPS 5350
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FlexiSeal ® RotaryFC and FH Profil
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FlexiSeal ® RotaryFF Profiles —
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V-Seals and ExcludersIntroductionCa
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V-Seals and ExcludersMaterialsCatal
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V-Seals and ExcludersA ProfileCatal
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V-Seals and ExcludersL ProfileCatal
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V-Seals and ExcludersDS and SSW Pro
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Rotary SealDesign GuideAppendixDesi
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ACatalog EPS 5350/USADesign Action
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AACatalog EPS 5350/USANotesA-4 Park
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Catalog EPS 5350/USARotary Lip Seal
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BBHigh Misalignment Inch1.000 to 3.
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Catalog EPS 5350/USAHigh Misalignme
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Catalog EPS 5350/USAFlexiSeal ® In
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FlexiSeal ® MetricCatalog EPS 5350
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Catalog EPS 5350/USASolid to Split
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Catalog EPS 5350/USASleeve & V-Seal
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Catalog EPS 5350/USAProTech Sizes
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ProTech Sizes Metric12.7 to 30.0Ca
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RPM to FPM ConversionCatalog EPS 53
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Pressure ConversionPSI / BARCatalog
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Catalog EPS 5350/USAChemical Compat
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Catalog EPS 5350/USANotesHHH-18 Par
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Catalog EPS 5350/USAOld to New Part
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Catalog EPS 5350/USAOld to New Part
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Catalog EPS 5350/USANotesIII-6 Park
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Catalog EPS 5350/USAOther Parker EP
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About Parker Hannifin CorporationCa
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Parker Hannifin Corporation, Seal G
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