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4300Catalog Assembly/Installation Seal-LokAssembly Seal-Lok Troubleshooting Guide O-Ring Face Seal CONDITION PROBABLE CAUSE(S) RECOMMENDATION Immediate leakage when � Improper tightening of joint � Check for O-ring damage and system is pressurized re-tighten connection to the recommended torque value Under-flanged assembly � Undersized tube diameter � Verify that the O.D. is correct; if resulting in tube slippage undersized, replace tube. during flanging � Die gripping surface is worn or � Inspect die gripping surface; if clogged or dirty excessively worn, clean or replace. Over-flanged assembly � Sleeve is positioned incorrectly in � Check for proper positioning of sleeve in die; die if over-flanged, replace tubing Flange out-of-round � Tubing was not cut properly � Cut tubing within 90� �1� � Tube was not properly supported � Support tubing so that tube end is during flanging perpendicular to tube stop during flanging � Tubing is eccentric � Replace with quality tubing � Replace out-of-round flanges Cracked flange � Tubing too hard � Replace tubing using recommended quality tube Scored, pitted flange � Improper deburring and cleaning � Replace flange using proper deburring and of tube prior to flanging cleaning recommendations � Flange pin not cleaned and � Keep flanging pin clean and working surfaces lubricated properly well lubricated. Leakage at braze joint � Poor braze joint/improper joint � Flux and reheat the joint, remove and replace clearance with new sleeve � Mixing of sleeve and tube � Always use steel sleeves with steel tubing material and stainless sleeves with � Improper/inadequate flux, braze stainless tubing alloy overrun, or buildup on face � Apply flux liberally to sleeve and tube end � Improper/inadequate braze prior to brazing. Use recommended flux, temperature braze alloy and brazing temperature. Leakage at face-seal end � Misalignment or improper fit � Align tube end and connecting fitting properly before tightening tube nut, holding the flat face of the mating fitting against O-ring while tightening � Damaged, pinched, improper, or � Replace O-ring, properly installing it in the missing O-ring face seal groove � Extruded O-ring � Replace O-ring and check for proper align- � Damaged fitting ment and pressure surges exceeding rated � Braze overflow on sealing surface pressure of fitting; tighten the nut to recom- mended torque or replace fitting if threads or sealing surface is grossly damaged. � Remove and replace sleeve which has braze overflow on its sealing surface. TableT16�Seal-LokTroubleshootingguide Dimensionsandpressuresforreferenceonly,subjecttochange. T19 ParkerHannifinCorporation TubeFittingsDivision Columbus,Ohio http://www.parker.com/tfd
Goodyear Rubber Products
