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09_ENGINEERING_AND_TECHNICAL_DATA - 58 Pages

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09_ENGINEERING_AND_TECHNICAL_DATA

Catalog excerpts

INTEGRATED FLUID POWER SOLUTIONS ENGINEERING AND TECHNICAL DATA

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SELECTING THE CORRECT HOSE ENGINEERING AND TECHNICAL DATA HYDRAULIC HOSE ASSEMBLY AND INDUSTRIAL HOSE SELECTION CRITERIA An effective way to remember hose selection criteria is to remember the word STAMP, if you want to select the proper hydraulic hose assembly extend this acronym to STAMPED. STAMPED S = Size T = Temperature A = Application M = Medium P = Pressure E = Ends D = Delivery Size The inside diameter must be carefully chosen since an undersized hose diameter leads to increased pressure loss and heat generation by excessive turbulence of the hydraulic fluid. Oversizing the hose,...

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Pressure In the hose selection process it is essential to know the system pressure, including pressure spikes. Published working pressures of the hoses must be equal or greater than the system pressure. Pressure spikes greater than the published working pressure significantly shorten hose life. To minimise hose failure, the hydraulic hose has a build-in safety factor which is specified by the ratio between the burst pressure and the maximum working pressure. This ratio equals 4/1 as specified in the ISO 7751 standard. Also take care of hydraulic system pressure drop on page 580. Ends...

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SELECTING THE CORRECT HOSE ENGINEERING AND TECHNICAL DATA HOSE SIZE SELECTION NOMOGRAM How to use the nomographic chart To determine the recommended hose assembly size where the flow rate is known, lay a straight edge across the three columns so that the edge registers with the flow rate figure in the left hand scale, and the recommended velocity range in the right hand scale. The point at which the straight edge intersects the centre scale indicates the recommended hose bore size. Should this reading not coincide with a standard hose assembly bore size, the right hand edge of the straight...

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MATERIAL TO BE CONVEYED Some applications require specialised oils or chemicals to be conveyed through the system. Product selection must assure compatibility of the hose tube, cover, couplings and ‘O’ rings with the fluid used. Additional caution must be exercised when selecting a hose for gaseous applications where permeation can occur. Permeation of fluid through the hose wall may occur when a hose is used in combination with fluids such as (but not limited to) liquid and gas fuels, refrigerants, helium, fuel oil, natural gas, LPG and Freon. Consider the possibility of hazardous effects...

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ENGINEERING AND TECHNICAL DATA Water temperature limits for hydraulic hoses According to ISO 8330 "Rubber and plastic hoses and hose assemblies - Vocabulary" the working temperature is the "maximum or minimum temperature at which a hose is designed to be serviceable". This temperature range is indicated in the hose pages. However, note that the nature of the hydraulic fluid used can lower the maximum working temperature. The below chart shows the maximum working temperature for Gates hoses when used with water-based hydraulic fluids. The main reasons for lowering maximum working...

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Why is knowing the amount of pressure drop so important? Suppose you need 275 bar of output from a hose assembly for hydraulic equipment to run efficiently. There will be some pressure drop and you must allow for it in plumbing the system with hose, couplings and adaptors. This means that the input pressure to the hose assembly must be equal to the output, plus the amount of pressure drop. If the pressure drop in this example is 10 bar then you will need 285 bar of input. Output pressure = input pressure - pressure drop 275 bar = 285 bar - 10 bar How can you determine the amount of pressure...

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SELECTING THE CORRECT COUPLING ENGINEERING AND TECHNICAL DATA COUPLING SELECTION CRITERIA Several factors, such as thread end compatibility, corrosion resistance, vibration, temperature, pressure, use of adaptors and fluid compatibility must be considered when selecting a coupling: Thread end compatibility Thread ends must be compatible in order to prevent leaking or assembly blowoff. Fittings seal three ways: thread interface, seat angles and/or ‘O’ rings. It is critical that both the male and female fittings are compatible to ensure an effective seal. Incorrect sealing will cause leaks,...

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SELECTING THE CORRECT COUPLING ENGINEERING AND TECHNICAL DATA FEMALE COUPLINGS JIS FJISX Female Japanese swivel. 30° inverted cone. BSP thread. BSP FBFFX Female BSP flat face swivel. JIS FKX Female Japanese swivel. 30° inverted cone. Metric thread. JIC FJX Female JIC swivel. 37° inverted cone. SAE FFORX Female SAE flat face 'O' ring swivel.

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Female SAE swivel. 45° inverted cone. mm DIN FDLX / FDHX Female DIN swivel. 24°/60° cone. Light series / Heavy series. FDLORX/FDHORX Female DIN 'O' ring swivel. 24° cone. Light series / Heavy series. FG FFGX Female French Gaz swivel. 24° cone. NPTFFPX Female NPSM pipe swivel. 30° cone. NPTF FP Female NPTF pipe.

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SELECTING THE CORRECT COUPLING ENGINEERING AND TECHNICAL DATA MALE COUPLINGS BSP MBSPT Male BSP taper BSP MBSPP Male BSP parallel. 60° inverted cone. SAE MFFOR Male SAE flat face 'O' ring. BSP MBFF Male BSP flat face.

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Male SAE parallel. 45° inverted cone. -I NPTF MP Male NPTF pipe. 04MIX "0’5"M"X" 06Mlix 07Mix 08Mix SAE 24° MFA Male SAE parallel. 24° inverted cone. DIN 24° MDL / MDH Male DIN parallel. 24° inverted cone. Light / Heavy series. NPTF MPX Male NPTF pipe swivel.

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ENGINEERING AND TECHNICAL DATA Male SAE 'O' ring boss swivel. FG MFG Male French Gaz parallel. 24° inverted cone.

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BANJO COUPLINGS BSP BSPBJ Metric banjo. STANDPIPE COUPLINGS METRIC MSP DIN metric standpipe.

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ENGINEERING AND TECHNICAL DATA FLANGE COUPLINGS SAE FL SAE 'O' ring flange. Code 61. FG MPFL Male French Gaz flange high-pressure. 24° Poclain cone.    — FLK Komatsu type 'O' ring flange. FLC Caterpillar type 'O' ring flange.

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