Hose & Coupling Selection

1 Seven Easy Steps For Selecting The Proper HoseAn effective way to remember hose Selection criteria is to remember the to be conveyedP=PressureE=Ends or couplingsD=Delivery (volume and velocity)1. Hose size (Dash Numbers)The inside diameter of the hose must be ade-quate to keep pressure loss to a minimum andavoid damage to the hose due to heat genera-tion or excessive turbulence. See hose sizingNomographic Chart on page C63. To determine the replacement hose size , readthe layline printing on the side of the originalhose. If the original hose layline is painted overorworn off, the original hose must be cut andthe inside diameter measured for size .

2 NOTE: Before cuttingan original hose assem-bly, measure the overall assembly length andfitting orientation. These measurements will berequired to build the replacement hydraulics industry has adopted a measur-ing system called Dash Numbers to indicatehose and Coupling size . The number whichprecedes the hose or Coupling description isthe dash size (see following table). This industrystandard number denotes hose in six-teenths of an inch. (The exception to this is theSAE100R5 hoses C5C, C5D, C5E, C5M as wellas, C14 and AC134a, where dash sizes denotehose equal to equivalent tube ) Seechart to the (Inches)All Except C5 Series,C5 Series, C14 andC14 and AC134aAC134aDash DATAEXT.

3 & VERY HIGHPRESS. HOSEGS & HOSEMEGACRIMP BRAKEHOSE & /C5 HOSE & & HOSE & & & ASSORT-MENTSPART NUMBERINDEXESFLEETHose & Coupling SelectionGates The World s Most Trusted Name in Belts, Hose and Hydraulics. C2 DATAEXT. & VERY HIGHPRESS. HOSEGS & HOSEMEGACRIMP BRAKEHOSE & /C5 HOSE & & HOSE& HOSE & & & ASSORT-MENTSPART NUMBERINDEXESFLEETHose & Coupling SelectionSelecting The Proper Hose con can be a critical factor when hose routingclamps are used or hoses are routed through individual hose specification tables for TemperatureWhen selecting a replacement assembly, two areas oftemperature must be considered.

4 These are fluid tem-perature and ambient temperature. The hose selectedmust be capable of withstanding the minimum andmaximum temperature seen by the system. Caremust be taken when routing near hot manifolds andin extreme cases a heat shield may be Gates Hydraulic Hose Selection Guide onpages C4 and C5; Hose Specification Pages; and/orthe Additional Temperature Limits For Gates HydraulicHoses Chart on page C8 for temperature ranges andlimits for water, water/oil emulsions and ApplicationDetermine where or how the replacement hose orassembly is to be used.

5 Most often only a duplicateof the original hose will have to be made. To fulfill therequirements of the application, additional questionsmay need to be answered, such as:nWhere will hose be used? nFluid and/or Ambient Temperature? nHose Construction?nEquipment Type? nFluid Compatibility? nThread End Connection Type?nWorking and Surge Pressures? nEnvironmental Conditions? nPermanent or Field Attachable Couplings?nSuction Application? nRouting Requirements? nThread Type?nGovernment and Industry Standards Being Met? nUnusual Mechanical Loads? nMinimum Bend Radius?

6 NNon-Conductive Hose Required? nExcessive Abrasion?4. Material to be ConveyedSome applications require specialized oils or chemicalsto be conveyed through the system. Hose selectionmust assure compatibility of the hose tube, cover,couplings and O-rings with the fluid used. Additionalcaution must be exercised in hose Selection forgaseous applications such as refrigerants and LPG. NOTE: All block type couplings contain nitrile O-ringswhich must be compatible with the fluids being PressureMost important in the hose Selection process isknowing system pressure, including pressure working pressures must be equal to orgreater than the system pressure.

7 Pressure spikesgreater than the published working pressure willshorten hose life and must be taken into DOES NOT recommend using hoses onapplications having pressure spikes greater thanpublished working pressures of the Ends of CouplingsIdentify end connections using Gates couplingtemplates and measuring tools on pages C25 orCoupling Identification section pages thread ends have been identified, consult theappropriate section of the catalog for specific partnumber Delivery (Volume and Velocity)If the same of the original hose is used, assumethe system is properly sized to efficiently transportfluid.

8 If the system is new or altered, determine thehose needed to transport required fluid volumeflow by using the Nomographic Chart on page DATAEXT. & VERY HIGHPRESS. HOSEGS & HOSEMEGACRIMP BRAKEHOSE & /C5 HOSE & & HOSE & & & ASSORT-MENTSPART NUMBERINDEXESFLEETHose & Coupling SelectionINDUSTRY AGENCIESABS American Bureau of ShippingAS Australia StandardDIN Deutsch Industry Norm, GermanDNV Det Norske Veritas for North Sea Floating VesselsEN European Norm/StandardGL Germanischer LloydsIJS Industrial Jack SpecificationsRCCC Regular Commom Carrier Conference for FleetTruck and BusSAE Society of Automotive EngineersGOVERNMENT AGENCIESDOT/FMVSS Department of Transportation/Federal Motor Vehicle Safety StandardMSHA Mine Safety and Health AdministrationUSCG Coast GuardAgency Specifications and Hose Selection GuideMeets These Agency Specifications* Except 1/4"** Except 3/8" & 1/2"** GT7NC meets ANSI

9 For vehiclemounted aerial devices (-3 to -8)@ to be used with a fire sleeve Except 1"Hose TypeABSASDINDNVENGLIJSRCCCSAEDOT/ FMVSSMSHA USCGFuel OilPowerEFG6K, G6K XX20023 4SH/4 SPXEN 856 4SH/4SP100R15 XXEFG5K, G5 KXX20023 4SH/4 SPXEN 856 4SH/4SP100R13 XXEFG4K, G4 KXX20023 4 SPEN 856 4SP100R12 XXEFG3K, G3KX20023 4 SPEN 856 4SP100R12 XXC12 MXX20023 4 SPXEN 856 4SP100R12 XXC12 X20023 4 SPEN 856 4SP100R12 XXM5 KXXM4K+XXX100R19 XXM4 KHXX100R19 XXG2XH100R2 Type ATXXG2AT-HMP 100R2 Type AT XX*M2T XXX100R16 XXCM2 TEN 853 2CS100R16XG2X20022 2 SNXEN 853 2 SNX100R2 Type AT XXG2 HXXEN 853 2SN100R2 Type AT XXXJ2 ATXXM3K XXXEN 857X100R17 XXM3K -12, -16 XXXEN 857X100R17, 100R9 XXXG1 X20022 1 SNXEN 853 1 SNX100R1 Type AT XXG1 HXEN 853 1SN100R1 Type AT XXMegaTech J1402, J1019106-74 (-4 to -10)TR500J1402106-74 NABTJ844C5C RP305(B)

10 100R5106-74 Type AII (-4 to 10)C5E J1019 106-74 Type AIC5D J1019 106-74 Type AIIC5M XJ30R2, J1257 XXG3 HEN 854 R3100R3 GTHEN 854 R6100R6 GMVX@X100R4 XXLOLXTHERMOPLASTICGT8, GT8NC100R8GT7, GT7NC**100R7C14100R14 REFRIGERANTP olarSeal AC134a J51 Type 2,J2064 POWER STEERINGPS1882050 The World s Most Trusted Name in Belts, Hose and Hydraulics. C4 DATAEXT. & VERY HIGHPRESS. HOSEGS & HOSEMEGACRIMP BRAKEHOSE & /C5 HOSE & & HOSE& HOSE & & & ASSORT-MENTSPART NUMBERINDEXESFLEETHose & Coupling SelectionGates Hydraulic Hose Selection GuideStandard IndustrySpecificationDescriptionConstruc tion(Reinforcement)