HNAoffersfourdifferenttypesoflinersforallpopularpumpstosuitanydrillingconditi***,includingpremiumchromiumliners,ceramicliners,chromium-platedlinersandhardenedliners.1)PremiumChromiumLiners:HNApremiumlinerscombinethestrengthofaforgedsteeloutshellwiththeabrasionandcorrosionresistanceofahighchromiumironinnersleeve.Theselinersfeatureacentrifugallycasthighchromeironsleevewhichismachinedandheattreatedtoaminimumuniformborehardnessof62RC.Eachlinerismachinedtoclosetolerancetoassureeaseofinstallationandlonglinerlifewiththeinsidediameterofthesepremiumlinershonedtoamirror-likefinishfor***oothevenwearduringthelifesuperiorperformanceundertoughcorrosiveandabrasiveconditi***.2)CeramicLiners:HNAceramiclinerscombinethestrengthofaforgedsteeloutshellwiththeabrasionandcorrosionresistanceofaceramicinnersleeve.WeprovideZirconia(ZrO3)sleevesaswellasAlumina(AL2O3)sleevesofwhichZirconiaexhibitsbetterimpactstrength,higherhardnessandcanbehonedtofinersurfacefinishesthanalumina.3)Chromium-planedLiners:HNAofferchromium-platedlinersmadefrompremiumforgedsteelwiththecoreplatedbychrome.Thechrome-platedlinersh***ehardeningcharacteristicsof58to62RockwellChardness.Materialis45#forgedsteel,tensilestrengthislargerthan450MPA,elongationislargerthan17%,hardnessisHRC180-200.Theboreisplatedbychrome,thicknessis0.15-0.18mm,hardnessisHRC58-60.4)Hardenedliners:HNAhardenedlinersoffereconomyinalinerthatismadefornormaltomildlycorrosivemudconditi***.Theselinersarehardenedandheattreatedunderstrictqualitycontroltoaminimumof60RChardnessandadepthof125inches.Eachlinerishonedtoamirror-likefinishfor***oothandevenwearduringthelifeofthelinerandismachinedtoclosetolerancestoassureeasyinstallationandlonglife.)