Rotary Seal Design Guide - Seals Unlimited

ProTech Bearing IsolatorsCatalog EPS 5350/USAEngineeringOil Leakage TestTesting and ValidationLaboratory testing has significant advantages over fieldtesting. The lab effectively compresses time and more easilyexplores limits. Before ProTech saw its first field test, it wasput through laboratory tests far more severe than conditionsever encountered in the field. ProTech’s effectiveness is alsovalidated by independent laboratory testing.Both ProTech and competitive seals were subjected tothree extreme in-house tests with ProTech clearly emergingas the seal of choice.1. Oil Leakage TestProTech and other seals were subjected to critical oil sealtesting using a machine built to SAE J110 standards. Onehundredhour tests were conducted with severe oil splash.Water Exclusion Test2. Water Exclusion TestThe test machine was modified by mounting five nozzlesat various positions relative to the exterior of the seal tosimulate severe external wash down. Using water atpressures of 30 to 62 psi (2.0 to 4.3 bar), these nozzlesindividually sprayed each seal from a distance of 3" in both astatic mode and while the shaft rotated at various speeds upto 3525 RPM. The nozzles tried to force water past the sealfor nearly two hours.3. Dust Exclusion TestThe test machine was modified with an enclosed chambercontaining a large quantity of fine dust and sand which wasvigorously agitated with the chamber attached to the outsideof each seal area. The equipment operated at speeds up to3525 RPM for a period of 70 hours in an environment that wasliterally a dense dust storm.88Table 8-4. Extreme Test ResultsMaterial:Expulsion Method:Design Type:BrandDust Exclusion TestPTFESingle-Port2-Pc. UnitizedParkerConclusionsProTech was the only seal that passed all three torturetests. In addition to lab testing, field trials confirm ProTech’sperformance superiority.BronzeSingle-Port2-Pc. Non-UnitizedBrand APTFEMulti-Port3-Pc. UnitizedBrand BBronzeSingle-Port3-Pc. UnitizedBrand COil Leak Test PASS Fail Pass FailWater Pressure Test PASS Fail Fail FailDust Test PASS Pass Fail Fail03/03/068-11 Parker Hannifin CorporationEPS DivisionToll Free: (800) 233-3900www.parkerseals.com