Seal-Lok O-Ring Face Seal Tube Fittings - Precision Fitting & Gauge

More documents

Recommendations

Info

4300 Catalog Seal-Lok ® O-Ring Face Seal Tube FittingsTechnical DataTrouble Shooting*Problem/Probable Causes Remedy Problem/Probable Causes RemedyLeakage at faceseal end:Misalignmentor improper fitDamaged, pinchedor missing O-ringExtruded O-ringImproper O-ringPinched O-ringImproper tighteningAlign the brazed tube end and theconnecting fitting properly beforetightening the tube nut. Hold the flatface of the mating fitting against theO-ring while threading on the nut andwrench tightening. Ensure that thetube bends are made to the appropriateangle(s).Use a new O-ring. Properly install itin theface seal groove. Make sure thatthe O-ring stays in the groove whiletightening the fitting. Holding the flatface of the mating fitting against theO-ring while tightening the nut willprevent the O-ring from coming out ofthe groove and getting pinched orfalling out.Replace the O-ring and check for thefollowing:- proper alignment (see above)- pressure surges in excess of 133%of rated pressure of the fitting couldcause the O-ring to extrude. Tightenthe nut to the recommended torque.Make sure the new O-ring is of theproper hardness. Standard Seal-LokO-rings are of 90 durometer hardness.An attempt to bleed off air by crackingthe seal of Seal-Lok fittings can causethe O-ring to come out of its grooveand get pinched. It can then extrudeout under pressure. Use Parker bleedadapters for bleeding off air from thesystem.Check the joint for tightness. Retorqueto the Parker recommended torquevalue. If it still leaks, it could be due toany one or com-bination of causeslisted below. Take the joint apart andfollow the recommendations listed.Remove the affected sleeve and re-braze a new one in its place. Do nottry to file, sand or grind the brazeoverflow. Braze alloy tends to flow inthe direction of higher temperature.This overflow can occur if the sealsurface is at a higher temperaturethan the tail end of the sleeve whenthe braze ring starts melting. Therefore,when the ring starts melting, theheat source should be relocated to thesmall diameter of the sleeve topromote braze flow through the joint.Check and replace fittings. Because ofelastomeric seal, Seal-Lok is tolerantof minor imperfections on its sealingsurface; but it cannot tolerate grossscratches, nicks, dents, etc. DamagedBraze overflowon sealing surfaceDamaged fittingLeakage at braze joint:Improper jointclearanceSeal-Lok sleeves are designed for.003 to .008 diametrical joint clearance,for silver brazing, with highquality commercial hydraulic tubing.Do not mix sleeve and tube mater-ials. Always use steel sleeves withsteel tubing and stainless sleeves withstainless tubing. Mixing materialschanges the joint clearance becauseof different thermal expansioncharacteristics of the two materials.First degrease the tube end andsleeve in suitable alkaline cleaner.Remove oxide build-up with aluminumfree emery cloth, if needed.Use Parker (AWS A5.8 Class B GA-1),(Handy & Harman Easy Flo 45) forsteel only and Parker SBR-SS (AWSA5.8 Class B Ag- 24) (Handy &Harman Braze 505) for steel orstainless steel.SBR-SS contains a small amount ofnickel to prevent interface corrosion instainless steel when exposed tocorrosive media.Apply flux liberally to the sleeve andtube end. Use AWS FB3A ParkerWhite Flux (Handy & Harman’s HandyFlux) for steel only and AWS FB3CParker Black Flux (Handy & Harman’sType B-1) for steel or stainless steel.The key is to ensure that both thetube and sleeve reach braze temperatureat about the same time. A dull redcolor of the tube and sleeve is a goodindication of adequate braze temperatureat which the braze ring shouldmelt completely. Too little heat maynot melt the braze ring completely,causing incomplete braze flow.Too much heat can cause braze alloyto boil resulting in pinhole type porosityin the joint. It can also burn the fluxretarding the braze flow.A complete 360° fillet at the small endof the sleeve is a good indication of fullbraze flow.Mixing of sleeve &tube materialImproper/inadequatecleaningImproper braze alloyImproper/inadequatefluxInadequate/improperbraze temperaturethreads can give a false sense of jointtightness because of their poorthreading ability.Flux and reheat the joint, removeand replace with a sleeve of appropriatematerial and with recommendedbore diameter for proper joint clearance.Repeat brazing in accordancewith recommended procedures.Table B4 — Seal-Lok Fitting Problems and Solutions*For trouble shooting with Parflange connection, see Bulletin 4390-1040B.B10Parker Hannifin CorporationTube Fittings DivisionColumbus, Ohio
4300 Catalog Seal-Lok ® O-Ring Face Seal Tube FittingsTechnical DataFeatures, Advantages & Benefits1. Manufacture — Seal-Lok fittings conform to SAE J1453.This specification not only controls dimensions and tolerancesof Seal-Lok fittings, but includes minimum performance requirements.(All shaped fittings are machined from forgings foradditional strength.)2. Sealing Capability — An elastomeric O-ring forms theprimary sealing element. The O-ring is contained within aprecision machined groove on the fitting body. It is compressedinto the groove by the flat face of the tube flange or brazesleeve, thus assuring leak free sealing.3. Pressure Rating — Seal-Lok fittings are the highestworking pressure industrial fitting on the market, ranging from highvacuum to 9,000 psi, depending on size.4. Vibration and Fatigue — Seal-Lok fittings have beenextensively used in applications that experience severe vibrationand shock with no field problems. See Bulletin4350-B8 for complete test results.5. Visible Inspection:Flanged — The surface of the flange should bereasonably smooth with no deep scratches, gouges orindentations. Minor surface imperfections outside of theseal area are acceptable.Brazed — Presence of braze alloy 360° around theback of the sleeve (tail) allows for a quick (non-destructive)check for proper braze joint attachment.6. No Tube Entry — Tube does not enter into the body of thefitting, allowing for zero clearance, drop-in installation of components.This makes repair and maintenance very easy.7. Assembly — A variety of sleeve attachment methods arenow available. These include torch brazing, induction brazingand flanging. Seal-Lok fittings can also be used as hoseadapters. Detailed assembly and inspection procedures canbe found on pages B5 through B8.8. Make-Up — From the finger tight position, one shortpull on the wrench gives the assembly a quick high rise torequired torque. Seal-Lok fittings have a solid “make-up feel”and excellent over-torque resistance.9. Tube Wall — The brazing of the sleeve to the outside ofthe tube allows Seal-Lok fittings to be used on thin to heavy walltubing. Seal-Lok fittings can also be used with the widest rangeof tubing grades.10. Reusability/Remakeability — Seal-Lok fittings can bedisassembled and reassembled many times. Simply replacethe O-ring on the tube end and tighten to recommended torque.11. Temperature Range — Seal-Lok fittings are suitable forsub-zero through elevated temperature applications. Servicetemperature is limited by the material of the chosen O-ring.12. Materials — Seal-Lok can be manufactured from a widevariety of materials. The most popular materials currently usedare steel and stainless steel. Upon request, the Tube FittingsDivision can machine Seal-Lok fittings from other materials.13. Envelope Size — Redesign of hydraulic systems arenormally unnecessary because Seal-Lok fittings are similar insize to the most popular fitting of all, the Triple-Lok 37° flaredfittings. The additional 1 1/2 threads on the port end fit allstandard SAE ports. Seal-Lok fittings are excellent hose adapters.14. Available Configurations — Seal-Lok fittings are availableas a standard in over thirty different configurations (asshown in the visual index on pages B2 and B3). Some of theseconfigurations are available in as many as twenty-seven differentsize combinations. Several of these fittings can actuallyreduce the total number of connections needed in a system.(Other configurations can be manufactured upon request.)15. Available Sizes — Seal-Lok fittings are available asstandard in sizes 1/4" (-4) through 2" (-32), the largest range ofORFS fittings in the industry. Only Seal-Lok offers sizes 7/8"(-14) and 2" (-32) in the industry.16. Parflange Technology — Specifically designed to be usedwith Seal-Lok fittings, the Parflange machines utilize an orbitalcold flow forming process to produce a smooth, rigidly supported90° sealing surface on the tube end. The flanged tubeends meet SAE J1453 for Formed Tube Connections. Thispatented Parflange process eliminates the need for messy andtime-consuming brazing.17. Captive O-ring Groove — Seal-Lok fittings are manufacturedwith a captive O-ring groove (CORG) designed to preventO-ring fall-out prior to final assembly. The CORG designconforms to SAE J1453.BB11Parker Hannifin CorporationTube Fittings DivisionColumbus, Ohio
Page 1 and 2: Seal-Lok ® O-RingFace Seal TubeFit
Page 3 and 4: 4300 Catalog Seal-Lok ® O-Ring Fac
Page 9: 4300 Catalog Seal-Lok ® O-Ring Fac
Page 19 and 20: 4300 CatalogPart DataSeal-Lok ® O-
Page 23 and 24: Trade policyThe EU would remain a l
Page 25 and 26: 4300 CatalogPart DataStraight Threa
Page 27 and 28: 4300 CatalogPart DataSwivel Nut Bra
Page 29 and 30: 4300 CatalogPart DataUnion CrossKLO
Page 43 and 44: 4300 CatalogPart DataORFS Tube End

Seal-Lok O-Ring Face Seal Tube Fittings - Precision Fitting & Gauge

Create successful ePaper yourself

Delete template?

Save as template?