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4300Catalog Assembly/Installation PortEndAssembly Troubleshooting Port End Connections 60� Cone (Metric, BSPP and NPSM) CONDITION PROBABLE CAUSE(S) RECOMMENDATION End of swivel nut contacts hex � Wrong combination of swivel � Ensure that components are to the shoulder of adapter before nut and adapter same specification (even with the same cone and ball nose tightens type, there are different designs for 60� cone fittings) Thread engagement seems � Scratches or nicks on sealing � Replace components. These fittings adequate and swivel nut is surface depend on metal-to-metal seal and tight but leakage still occurs � Chatter marks on sealing require smooth mating surfaces surface to seal There is leakage from the joint � Inadequate make-up torque � Use proper torque to create a seal as and the swivel nut is loose well as prevent vibration loosening Swivel nut tightens, cone is � Inadequate or no chamfer in � Use components with proper chamfer tight but connection still leaks adapter (very common occurrence with NPTF/ NPSM 60� cone fittings). Male pipe end must have chamfer for proper sealing. Not all male pipe ends have chamfer as standard Tapered Thread (including BSPT, NPT and metric taper) CONDITION PROBABLE CAUSE(S) RECOMMENDATION Thread galling � Most common in stainless � Replace fitting and apply proper thread steel, caused by friction and sealant/lubricant to replacement fitting lack of lubricant and tighten to appropriate TFFT Fitting leaks, even after � Sealant omitted or � Re-apply sealant to appropriate TFFT proper tightening inadequately applied and re-tighten � Damaged or cracked threads � Replace fitting � Cracked port � Replace component � Thread mixing of BSPT and � Determine port thread type and replace NPT threads fitting with matching thread type Insufficient thread � Quality problem with port or � Have port and adapter thread engagement (3 to 6 threads adapter inspected; replace faulty parts of engagement required) � Too much thread sealant (tape) � Remove all thread sealant and re-apply 1 to 2 layers of tape Too much thread engagement � Typically port or adapter � Inspect port and adapter for proper (more than recommended 3 to machining or wear problem, tolerance or wear, replace faulty parts, 6 threads) or port could be cracked due retighten to appropriate TFFT to excessive torque Poor-quality threads or � Larger sizes are more prone to � Replace fitting with threads that damaged/nicked threads having nicked threads due to are free of scratches and nicks handling damage Dimensionsandpressuresforreferenceonly,subjecttochange. T9 ParkerHannifinCorporation TubeFittingsDivision Columbus,Ohio http://www.parker.com/tfd
Goodyear Rubber Products
