Technical Information Index HOSES Assembly Length .......................................... 300 - 301 Hex Dimensions ......................................................321 ONE-PIECE B SERIES Cautionary Statement & Limited Warranty ..........323 Hydraulic Hose Sizing Nomogram ........................297 Conversion Charts ........................................ 319 - 320 Installation & Assembly..................................302-303 Fitting Identification ...............................................304 Pressure & Distance Conversions ........................ 319 Fitting Identification - American ................. 306 - 310 Pressure Drop International Chart ......................299 ONE-PIECE Fitting Identification - British ................................ 311 Pressure Drop U.S. Chart ......................................298 D SERIES Fitting Identification - French ................................ 312 Safety Guide .................................................. 294 - 296 Fitting Identification - German .....................313 - 314 Temperature Conversions .....................................320 Fitting Identification - Japanese ..................315 - 316 Thread Type .............................................................305 F & P SERIES Torque Data ....................................................317 - 318 ONE-PIECE TWO-PIECE FERRULES (A & PFR SERIES) TWO-PIECE INSERTS TWO-PIECE INSERTS (A SERIES) TWO-PIECE FERRULES & INSERTS (X & Z SERIES) INTERLOCK RELEASE QUICK EQUIPMENT ASSEMBLY INFORMATION TECHNICAL Because we continually examine ways to improve our products, we reserve the right to alter specifications or discontinue products without prior notice. 292 www.kuriyama.com KHCCA1020 HOSES B SERIES ONE-PIECE D SERIES ONE-PIECE ONE-PIECE F & P SERIES (A & PFR SERIES) TWO-PIECE FERRULES (A SERIES) TWO-PIECE INSERTS TWO-PIECE INSERTS INTERLOCK (X & Z SERIES) FERRULES & INSERTS TWO-PIECE QUICK RELEASE Notes ASSEMBLY EQUIPMENT 293 Because we continually examine ways to improve our products, we reserve the right to alter specifications or discontinue products without prior notice. KHCCA1020 www.kuriyama.com TECHNICAL INFORMATION Safety Guide HOSES Safety Guide and Basic Factors for Selecting, Installing & Maintaining Hose and Hose Assemblies ONE-PIECE B SERIES Hydraulic hose (and hose assemblies) has a limited life As soon as the value for Re exceeds 2300, the laminar flow dependent on service conditions to which it is applied. changes to turbulent flow. Subjecting hose (and hose assemblies) to conditions more Laminar flow – In laminar flow, the individual fluid particles severe than the recommended limits significantly reduce move up to certain speeds in uniform layers alongside each service life. Exposure to combinations of recommended limits other. They scarcely disturb or influence each other. ONE-PIECE (i.e., continuous use at maximum rated working pressure, D SERIES maximum recommended operating temperature and minimum Turbulent flow – If the value for Re exceeds 2300, flow bend radius) will also reduce service life. becomes whirling and turbulent. The individual particles no longer move in one direction in an orderly fashion, but influence WARNING: FAILURE TO FOLLOW PROPER SELECTION, and hinder each other. INSTALLATION AND MAINTENANCE PROCEDURES MAY F & P SERIES ONE-PIECE RESULT IN PREMATURE FAILURES, BODILY INJURY, AND DAMAGE TO PROPERTY. 1. SELECTION – The following is a list of factors which must be considered before the selection of a hose can be made: 1.1 Line size: LAMINAR TWO-PIECE FERRULES In order to achieve maximum efficiency in a hydraulic system, it (A & PFR SERIES) is necessary to keep pressure losses (resistance to the volumetric flow) to a minimum when a fluid is conveyed by the different types of flow lines. When a fluid flows through a flow line, heat is generated by TURBULENT friction. Thus part of the energy is lost as heat energy, which results in a pressure loss. Certain fluid flow velocities have proved to be most suitable for hydraulic flow lines. TWO-PIECE INSERTS TWO-PIECE INSERTS Recommended flow velocities: Suction lines: 0.5 ........ 1.2 m/s 1.6 ....... 4 feet/s (A SERIES) Return lines: 2............. 3 m/s 6.5 ..... 10 feet/s Pressure lines: 4.......... 7.5 m/s 13...... 25 feet/s It is therefore important to calculate correctly the required flow line sizes. Undersized pressure lines result in high fluid velocity causing an excessive pressure drop, and heat build up, which impair overall system performance. Undersized suction lines TWO-PIECE FERRULES & INSERTS These pressure losses depend upon: can cause cavitation at the hydraulic pump inlet, affecting performance, shortening pump life, and creating excessive ● Flow velocity (for a given volumetric flow, the fluid flow (X & Z SERIES) noise levels. velocity increases with a decrease in the cross sectional The flow capacity nomogram on page 14 is an aid to determine area of a flow line and vice versa) · length of the flow line INTERLOCK the correct hose internal diameter size, desired flow rate and ● The viscosity of the fluid flowing recommended velocity. By the use of any two known factors, ● The density of the fluid flowing the third can be determined. ● The type of flow (laminar or turbulent) 1.2 Pressure: Types of flow – The type of flow changes from laminar to After determining the system pressure for a hydraulic system, RELEASE QUICK turbulent at a certain flow velocity. This velocity is given by the hose selection must be made so that the recommended Reynold’s Number Re. maximum operating pressure specified by a given hose, is For cylindrical flow lines the following formula applies: equal or greater than the system pressure. Dynamic pressure is common for all hydraulic systems. Re = vxd EQUIPMENT ASSEMBLY υ Pressure surges which exceed the maximum working pressure (pressure relief valve setting) affect the service life of system where v = velocity (m/s) components, including a hose assembly and therefore need to d = flow line internal dia. (m) be taken into consideration. Hoses used for suction lines must υ = kinematic viscosity (m2/s) be selected to ensure the hose will withstand the negative pressure of the system. INFORMATION TECHNICAL Because we continually examine ways to improve our products, we reserve the right to alter specifications or discontinue products without prior notice. 294 www.kuriyama.com KHCCA1020 Safety Guide 1.3 Temperature: cutting of the hose cover. Exposure of the reinforcement will significantly accelerate hose failure. Care must be taken to ensure that the operating temperature HOSES of the fluid being conveyed and ambient temperatures, do not 1.10 Proper End Fitting: exceed the limitations of the hose. Special care must be taken Care must be taken to ensure proper compatibility exists between when routing near hot manifolds or molten metal. the hose and coupling selected based on the manufacturer’s 1.4 Fluid Compatibility: recommendations substantiated by testing to industry standards such as Hose selection must assure compatibility of the hose tube, cover, B SERIES reinforcement, and fittings with the fluid used. Additional caution SAE J517 ONE-PIECE must be observed in hose selection for gaseous applications. DIN 20024, JIS B 8360. Some fire resistant fluids require the same hose as petroleum oil. 1.11 Length: Some use a special hose, while a few fluids will not work with any hose at all. When establishing proper hose length, motion absorption, hose D SERIES length changes due to pressure, as well as hose and machine ONE-PIECE 1.5 Permeation: tolerances must be considered. Permeation (that is, seepage through the hose) will occur from 1.12 Specifications and Standards: inside the hose to outside when hose is used with gases, liquid and gas fuels, and refrigerants (including but not limited to such When selecting hose and fittings, government, industry, and materials such as helium, fuel oil, natural gas, or freon). This manufacturer’s specifications and recommendations must be ONE-PIECE permeation may result in high concentrations of vapors which are reviewed as applicable. F & P SERIES potentially flammable, explosive, or toxic, and in loss of fluid. 1.13 Hose Cleanliness: Even though the fluid compatibility is acceptable, you must take Hose components may vary in cleanliness levels. Care must be into account the fact that permeation will occur and could be taken to ensure that the assemblies selected have an adequate hazardous. Permeation of moisture from outside the hose to level of cleanliness for the application. inside the hose will also occur. If this moisture permeation would 1.14 Welding and Brazing: have detrimental effects (particularly but not limited to refrigeration and air conditioning systems), incorporation of Heating of plated parts, including hose fittings and adaptors, (A & PFR SERIES) above 232°C (450°F) such as during welding, brazing, or soldering sufficient drying capacity in the system or other appropriate TWO-PIECE FERRULES system safeguards should be selected and used. may emit deadly gases. 1.6 Routing: 1.15 Electrical Conductivity: Attention must be given to optimum routing to minimize inherent Certain applications require that a hose be non-conductive to problems. Restrain, protect or guide hose with the use of clamps prevent electrical current flow. Other applications require the hose if necessary to minimize risk or damage due to excessive flexing, to be sufficiently conductive to drain off static electricity. whipping or contact with other moving