Kuri-Tec tubing and hose - Kuriyama of America

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®FITTING SUGGESTIONSFitting Suggestions for Kuri Tec ® Hose & TubingIt is extremely important that the fitting and hose or tubingbe properly matched in size and type. The insert shouldalways be slightly larger than the tubing to create a slightexpansion of the tube and provide a good consistent seal.If a clamp or ferrule is used to compress the hose, cautionmust be used to prevent over-crimping the ferrule orover-tightening the clamp. More pressure does notnecessarily improve fitting retention.We do not recommend the use of reusable fittings unlessthe hose and fitting have been specifically designed tobe compatible and have been thoroughly tested incombination prior to use.Clamps over barbed fittingsdiameter for hydraulic fittings. For this reason, as ageneral rule we do not recommend the use of one-piececrimped hydraulic fittings with Kuri Tec hoses.Fig. 2AFig. 2BIn figures 2A and 2B above, two styles of crimping diehave been used successfully. The ferrules and fittings areproperly matched in length.Fig. 1AFig. 1CIn the illustrations above, the clamps are properlypositioned in Figure 1A and 1B, directly over the middlebarbs and behind the first barb. This is extremelyimportant in the case of single-barb fittings, as shown inFigure 1B, since the barb is generally much larger thanthe shank of the fitting. The compressed material cannotpass over the barb when under tension, thus securelyholding the fitting to the hose.In Figures 1C and 1D, the clamp has been improperlypositioned too close to the end of the fitting. In Figure1C, only the barb nearest the end of the fitting is effectivein maintaining fitting retention. The first two barbs serveno purpose whatsoever in providing fitting retention orleak resistance. In Fig. 1D, the situation is even worse,since the clamp can very easily cut the core tube over theenlarged barb, leading to leakage and subsequent coverblisters or bursts.When choosing multi-barb fittings for use with Kuri Techose, as in Fig. 1A and 1C, it is important that the barbsnot be too deep. The core tubes in Kuri Tec hoses aregenerally somewhat harder than conventional rubbertubes and therefore the material cannot flow into the deepbarb, as it would with a soft rubber compound.AcceptableFig. 1BFig. 1DUnacceptableFerrules crimped over barbed fittingsIn Fig. 2C, the ferrule is much shorter than the barbedinsert. Without the protection of the ferrule, repeatedharsh flexing of the hose at the fitting can damage thetube. In addition, the short ferrule does not take fulladvantage of the sealing or retention properties of thebarbed insert.In figure 2D, there are two potential problems: 1) Theexcessively-long ferrule can reduce the inside diameterof the hose just beyond the fitting; and 2) a single-barbfitting is not the ideal insert for a crimped ferrule. Becauseof the increased depth of the single barb, the tube can becut by the force of the crimping before sufficient compressionis exerted on the shank of the fitting.Compression FittingsCompression fittings depend solely on contact with theouter surface of the tubing to provide sealing and holdingpower. There is no seal on the inner surface of the tubing.With the exception of 220/221 Series LLDPE tubing, wedo not recommend the use of compression fittings withKuri Tec hose and tubing. To work properly, the materialmust be hard and smooth and there must be no yarnreinforcement layer.Fitting suggestions for Kuri Tec ® spray hosesIn addition to the properly installed fittings shown in Fig.1A, 1B, 2A and 2B above, we also suggest the use of atwo-barb clamped fitting when high pressures are involved.When properly crimped, a metal ferrule over a multibarbedfitting can provide excellent fitting retention andleak resistance. However, excessive crimping pressurecan damage the core tube, leading to hose failure.ExtremePlease refercaretomustthealsobackbepagetakenfortothecontrollocationthe crimpingof your nearest The warehouse double-barb for fitting, availability held in of place products/sizes by two properly shown.positioned clamps, provides excellent fitting retention andBecause we continually examine ways to improve our products, we reserve the right to alter specifications OR DISCONTINUE PRODUCTS without prior notice.64 KKTCA0408Fig. 2CCompression SleeveFig. 2DPush-to-connect
®leak resistance without risk of damage to the core tubeor deterioration of the yarn reinforcement due to wicking.Hose failure near a fittingA hose is most susceptible to failure near the fitting. Theinstallation of the fitting involves some risk of damage tothe core tube. There is also some possibility of slightleakage along a fitting and subsequent yarn wicking,particularly if a one-piece crimped fitting is used. Thegreatest amount of flexing often occurs near the fitting ateither the supply or service end of the hose.In the investigation of a hose failure near the fitting, itis essential that the fitting/hose interface be examined.In the field, if the failure or deterioration is isolated tothe area near the fitting, it is best to cut off the end ofthe hose, reinstall a new fitting, and monitor the hose inservice to see if the problem reoccurs.If the problem involves a spray hose and fluid slowlyleaking through the cover perforations near the fitting,the most likely cause is wicking along the reinforcingyarn from the end of the hose or from a cut or break inthe core tube. Such wicking can extend over several feetand a leak may be seen at a considerable distance fromthe source of the leak.If a hose is being returned to the supplier for investigationof a failure, it is essential that the fitting . . . or atleast the section of hose in contact with the fitting . . . bereturned. Only by examining the inner surface of the tubethat was in contact with the fitting can one determinewith certainty if the problem began at the fitting.WARNINGThe above comments and fitting suggestions are intendedfor use as guidelines only. The information provided isbased on tests which we believe to be reliable and onour past observations and experience. No warranty isexpressed or implied, as applications and methods offitting installation can vary widely. Before placing a hosein service, the user must determine the suitability of thefitting and hose/tube for his or her intended use. Theuser assumes all risk and liability resulting from the useof any Kuri Tec product with any fitting whatsoever.FITTING SUGGESTIONSTemperature Dependence of Pressure RatingAs a general rule, the working pressure ratings forplastic reinforced hoses are based on room temperatureconditions. The maximum allowable pressure for a hosedecreases as the temperature increases and the materialbecomes softer and more elastic. Fitting retentiondecreases at higher temperatures as the compression onthe material declines.Working pressure ratings can be affected significantly bythe type of fitting used, the method of attachment, andthe temperature to which the hose assembly is exposedin service. Repeated intermittent periods of exposureto elevated temperatures can affect fitting retentionand it is, therefore, very difficult to assign workingpressure ratings at high temperatures. The graph belowdemonstrates the overall trend.Burst strengthdecreases astemperatureincreasesWorking Pressure RatingsWorking pressure ratings are given in this catalog at 70°F No warranty is expressed or implied, as applicationsand 122°F. Between 122°F and the maximum service and methods of fitting installation may vary widely.temperature, it must be noted that a rapid decline in the Before placing a hose in service, the user mustpressure rating of the hose may occur, and all factors determine the suitability of the product under the correctrelating to the hose, fittings and service conditions must working conditions, and assumes all risk and liability inbe taken into consideration.connection therewith.Please refer to the back page for the location of your nearest warehouse for availability of products/sizes shown.Because we continually examine ways to improve our products, we reserve the right to alter specifications OR DISCONTINUE PRODUCTS without prior notice.KKTCA040865
Page 1 and 2:
TMLeaders in ThermoplasticHose Inno
Page 3 and 4:
®Kuri Tec ® Hose & Tubing Index b
Page 5 and 6:
®TYPE DESCRIPTION PAGEReinforced A
Page 7 and 8:
K1131 ®K1134 K1154K1136 K1156 K117
Page 9 and 10:
®KLEARON 73Series K010Clear PVC T
Page 11 and 12:
®Series 3300Ether-BasedPolyurethan
Page 13 and 14: ®Series 2840, 2841,2844, 284695 Sh
Page 15 and 16: ®221 SeriesLinear Low DensityIndus
Page 17 and 18: ®Series A3236High PurityNon-Toxic
Page 19 and 20: ®Series K6136High Purity Street to
Page 21 and 22: ®Series 136Non-Toxic RV WaterHose
Page 23 and 24: ®CLEARBRAID ®K3130 Series BFHeavy
Page 25 and 26: ®Polywire ® PlusSeries K7300 Hose
Page 27 and 28: ®POLYWIRE ®Series K7130Heavy Wall
Page 29 and 30: Series A1141, A1144,A1146, A1148Spe
Page 31 and 32: POLYAIR ®Series K1131, K1134,K1136
Page 33 and 34: ®Series K1171, K1173K1174, K1176Ge
Page 35 and 36: Series K2163Contractor PVCWater Hos
Page 37 and 38: ®Series A1317Heavy Duty Reinforced
Page 39 and 40: ®PNEU-THANE Series HS5090,HS5094,
Page 41 and 42: ®Series HS1171,HS1174, HS1176Gener
Page 43 and 44: ®Kuri Tec IPOP DisplayHose assembl
Page 45 and 46: ®Series A4143S(with Static Wire)Me
Page 47 and 48: ®Series A1687800 PSI PVC/Polyureth
Page 49 and 50: ®Series K4131,K4132, K4137600 PSI
Page 51 and 52: ®Series K4350EVA Yarn-ReinforcedSp
Page 53 and 54: ®Considerations for Selecting and
Page 55 and 56: ®Series A1263Low TemperatureNon-To
Page 57 and 58: ®Series A4176Conductive PVCAir Hos
Page 59 and 60: ®Series K7000Anti-Stat Blasting Tu
Page 61 and 62: ®Custom Compounds/Extrusions• Co
Page 63: ®Kuri Tec® hose and tubing produc
Page 67 and 68: ®Key: E=Excellent G=Good L=Limited
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Kuri-Tec tubing and hose - Kuriyama of America

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