579S FRANCEJOINT | Alldatasheet
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Technical content
QUALITY & EXPERTISE FOR YOUR SEALING NEEDS DESCRIPTION The BECA 579S profile is a high- performing, double acting compact piston seal composed of a flexible rubber ring, two polyurethane back-up rings and two L-shaped POM wear rings. ADVANTAGES Good sealing effect Excellent extrusion resistance Excellent wear resistance Reliable sealing for significant and sudden pressure variations Assembly in closed groove, reduced machining costs Economic wear and sealing solution APPLICATIONS Agriculture Mobile machinery Hydraulic cylinders MATERIALS Profiled seal NBR 80 Shore A Back-up rings Polyurethane 97 Shore A Wear rings Polyoxymethylene - POM TECHNICAL DATA Temperature -30°C / +100°C Pressure 50 MPa Speed 0.5 m/sec Media Mineral hydraulic oils The figures above indicate the maximum values and may not be cumulated. They may be developed, depending on the materials used. SURFACE ROUGHNESS Roughness Dynamic surface area Static surface area Groove flanks Ra 0.1 - 0.4 µm ≤1.6 µm ≤3.2 µm Rz 0.63 - 2.5 µm ≤6.3 µm ≤10.0 µm Rmax 1.0 - 4.0 µm ≤10.0 µm ≤16.0 µm CHAMFERS AND RADIUS Radial section S Radius Radius Chamfer C 4.00 0.40 0.40 2.50 5.00 0.40 0.40 3.00 6.00 0.40 0.40 3.00 7.50 0.40 0.40 4.00 8.50 0.40 0.40 5.00 10.00 0.80 0.80 6.00 15.00 0.80 0.80 8.00 PISTON SEALS BECA 579S HYDRAULIC SEALS | PISTON SEALS | BECA 579S
www.francejoint.com ØD1 L1L2 L2 SØd1 Ød3 Ød2 20/30° C F_2 DIMENSIONS Part number Bore diameter ØD1 H9 Groove dimensions Ød1 h9 Ød2 h9 Ød3 h11 L1 0/+0.20 L2 0/+0.10 HYDRAULIC SEALS | PISTON SEALS | BECA 579S
FRANCE JOINT SAS Zone Artisanale Le Mortier - B.P . 50009 - Cugand - 85613 Montaigu Cedex - France Ph. +33 (0)2 51 42 13 76 - Fax +33 (0)2 51 43 61 14 - Email: contact@francejoint.fr - Website: www.francejoint.com Part number Bore diameter ØD1 H9 Groove dimensions Ød1 h9 Ød2 h9 Ød3 h11 L1 0/+0.20 L2 0/+0.10 The figures highlighted in bold correspond to the dimensions for standard ISO 6547, with the bore diameters in line with standard ISO 3320. Other intermediate sizes can be provided. HYDRAULIC SEALS | PISTON SEALS | BECA 579S