Rotary Seal Design Guide - Seals Unlimited

Catalog EPS 5350/USAMaterialsTable 3-1. Case Profiles/MaterialsApplication Description Profile Application Description ProfileMost common andeconomical.ParKote coating isstandard.“L” Case B Ease of removal.Positioning flange.“P” CaseP33Improved OD sealingin bores with minorimperfections and insoft alloy housings.Rubber CoveredCaseCProtects metal casefrom internalcorrosion.Rubber LinedCaseMInner case providesstructural rigidity forlarge cross-sections.ParKote coating isstandard. Guidesshaft duringinstallation.Double Case A Reduced spring back.Ease of installation.Combines sealabilityof rubber OD andmetal retention ofmetal ODHeel CaseDRustproof, gasket likeOD seal. Ease ofinstallation.Aramid FiberCompositeCaseH1, H5 Rustproof, gasket-likeOD seal. Ease ofinstallation. Metalbands for severeshock loads.Aramid FiberCompositeCaseSTHSpring MaterialsSprings are available in a widerange of materials from Parker. ParkerOil Seal profiles are provided withcarbon steel springs as standard.Clipper Oil Seal designs are furnishedwith 302 stainless steel springs asstandard. Standard spring materialsfor PTFE FlexiSeal profiles are stainlesssteel, Hastelloy and Elgiloy .® ®Other spring materials are available atan additional cost. Table 3-2 showsgeneral operating parameters for themost common spring materials.Table 3-2. Spring Material ParametersWire TypeMaximumServiceTemperature°C °FApplicationCarbon Steel 120 250 General purposeMonel 400 230 450 SaltwaterInconel 750 675 1250 Extreme temperaturePhosphor Bronze 95 200 Saltwater302/304 Stainless Steel 260 500 Corrosion resistance316 Stainless Steel 315 600 Hi-temp corrosionresistanceHastelloy ® 204 400 Corrosion resistanceElgiloy ® 260 500 Corrosion resistanceMonel ® is a registered trademark of Inco Alloys International, Inc.Inconel ® is a registered trademark of Huntington Alloys Corporation.03/03/063-4 Parker Hannifin CorporationEPS DivisionToll Free: (800) 233-3900www.parkerseals.com