Rotary Seal Design Guide - Seals Unlimited

FlexiCase EngineeringChoosing the Right DesignFrom Gland Dimensions to Part NumberStep 1 — Choose profile. Choose the best profilefor your application from the decision tree andtable on Pages 10-7 through 10-9, and place the3-character profile description into the partnumber as shown here in this example.Choice: CFE profileXXXXCFEXXXXXXXXXXXXXStep 2 — Choose material. Choose the bestmaterial for the application and place the 4-digitmaterial code into the part number as shown here:Choice: 0301 — Graphite Filled PTFE0301CFEXXXXXXXXXXXXXStep 3 — Choose gasket material. Choose thebest gasket material after considering thechemicals and temperatures it will be exposed to.Consult the Parker O-Ring Handbook (ORD5700A/US Section II) as a general reference andchoose the most appropriate material family. Placein the part number as shown here:Choice: Nitrile gasket (N code)0301CFEXXXXXXXXXXXNXStep 4 — Choose metal can material. ConsultPage 10-6 and choose the best fit for theapplication. Place the choices in the part numberas shown here:Choice: Cold rolled steel can (C code)0301CFEXXXXXXXXXXXNCStep 5 — Fill in the size portion of the part number.Choose the optimal size of the part based on thelimitations of the cross-section and diameter(Pages 10-8 to 10-9) and place into the partnumber as shown:Choice: 2.250" shaft x 3.125 ± .0015 bore Ø x0.500" bore depthCalculate Radial Gland Cross-Section andinput into part number:(3.125" Bore – 2.250" Shaft) ÷ 2 = 0.4375",rounds to 0.438"0301CFE438XXXXXXXXNCInput shaft diameter into part number:0301CFE43802250XXXNC32Bore Ø30°Shaft Ø ± .00215°Radius0.250.063Radial Cross-SectionCatalog EPS 5350/USAStep 6 — Find minimum seal width from Pages10-8 to 10-9 and input into part number. Minimumseal width is always the most economical, but youcan choose any width between the minimumrecommended seal width and the actual boredepth. In this case you could choose any widthbetween 0.200" and 0.500".Minimum seal width = 0.200"0301CFE43802250200NCFrom Part Number to Gland DimensionsStep 1 — Extract shaft dimensions from part number:0301CGN50001125437VS01125 = 1.125" shaft diameterApply tolerance according to Table 10-2For 1.125" shaft tolerance = ±.003" plungegrind shaft to achieve low surface finishStep 2 — Extract bore diameter from part number:0301CGN50001125437VS500 = 0.500" cross-sectionBore Ø = Shaft Ø + (2 x cross-section)Bore Ø = 1.125" + (2 x .500) = 2.125"Apply tolerance according to Table 10-2For 2.125" bore, tolerance = ±.001"Step 3 — Extract bore depth from part number:0301CGN50001125437VS437 = 0.437" seal heightmin. bore depth = seal heightmin. bore depth = 0.437"Bore DepthR 0.025 Max.**Note: Formore specificinformationon surfacefinish refer toTable 2-5 onPage 2-21.03/28/06101010-3 Parker Hannifin CorporationEPS DivisionToll Free: (800) 233-3900www.parkerseals.com