Pneumatic And Hydraulic Equipment Page 1268

HOSE ASSEMBLIES Catalog Numbers for hose assemblies are basically the same as hose ends, except both the ends must be specified as well as the overall length. This process is detailed below: 4./1. Type of desired hose. 4./2. Hose size (I.D.) in sixteenths of an inch (04 = 4/16" = 1/4"). Exception: 13/32" I.D. hose. 4./3. End style and material. 4./5. Style and size of each hose end. Example: P04 Male Straight Thread O-Ring 1/4", S64 Female Forseal 1/4". 4./6. Length of assembly. The first three digits specify a length in inches. The last two digits are for fractions of an inch expressed in decimal hundreths (01250 = 121/2"). NOTE: To determine the hose only length when making a hose assembly, subtract each hose end cut-off factor from the overall hose assembly length. Please see the individual hose end listings for cut-off factor information. HOSE INSTALLATION GUIDELINES 1. Provide for length change. In straight hose installations, allow enough slack in the hose line to provide for changes in length that will occur when pressure is ap- plied. This change in length can be from +2% to -4%. 3. Protect from hazardous environment. Keep hose away from hot parts. High ambient temperature will shorten hose life. If you can not route it away from the heat source, insulate it. 5. Use proper bend radius. Keep the bend radius of the hose as large as possible to avoid collapsing of the hose and restriction of flow. Follow catalog specs on minimum bend radii. 7. Secure for protection. Install hose runs to avoid rubbing or abrasion. Use Weather head Hose Clamps to support long runs of hose or to keep hose away from moving parts. It is important that the clamps not allow the hose to move. This movement will cause abrasion and premature hose failure. 2. Avoid twisting and orient properly. Do not twist hose during installation. This can be determined by the printed layline on the hose. Pressure applied to a twisted hose can cause hose failure or loosening of connections. 4. Avoid mechanical strain. Use elbows and adapters in the installation to relieve strain on the assembly and to provide easier and neater installations that are accessible for inspection and maintenance. 6. Use proper bend radius (cont'd). Minimum bend radius is measured on the inside bend of the hose. To determine minimum bend, divide the total distance between ends (B length) by 2. For example, B = 6, minimum bend radius = 3. 8. Avoid improper hose movement. Make sure relative motion of the machine components produces bending rather than twisting of the hose. Hose should be routed so that the flex is in the same plane as the equipment movement. WRONG RIGHT WRONG RIGHT WRONG RIGHT WRONG RIGHT WRONG RIGHT WRONG RIGHT HOSE ASSEMBLY PART NUMBERING SYSTEM Weatherhead Eaton Weatherhead hose and fittings (314) 427-0600 800-444-0522 (FAX) 314-427-3502 www. j hf.com JHF Catalog [ Volume 7 ] 1268 Prices Subject to Change Without Notice John Henry Foster pneumatic and hydraulic equipment

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