512 FRANCEJOINT | Alldatasheet
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QUALITY & EXPERTISE FOR YOUR SEALING NEEDS EXTRUSION GAPS Pressure MPa Radial gap F/2 10 MPa 0.50 25 MPa 0.50 35 MPa 0.40 40 MPa 0.30 50 MPa 0.30 SURFACE ROUGHNESS Roughness Dynamic surface area Static surface area Groove flanks Ra 0.05 - 0.2 µm ≤1.6 µm ≤3.2 µm Rz 0.4 - 1.6 µm ≤6.3 µm ≤10.0 µm Rmax 0.63 - 2.5 µm ≤10.0 µm ≤16.0 µm CHAMFERS AND RADIUS Radial section S Radius Radius Chamfer C 5.00 0.20 0.70 2.50 7.50 0.20 1.20 5.00 11.50 0.20 1.80 8.00 14.00 0.20 2.50 10.00 DESCRIPTION The BECA 512 profile is a high- performing, double acting compact piston seal composed of a dynamic bronze-filled PTFE friction ring, flexible pre-tightened NBR ring and two POM back-up rings. ADVANTAGES Low friction coefficient; no stick-slip effect Increase in possible extrusion gaps Excellent extrusion resistance even during pressure peaks Excellent abrasion resistance Assembled by deformation APPLICATIONS Mobile hydraulics Hydraulic cylinders MATERIALS Profiled seal NBR 80 Shore A FKM 80 Shore A Friction ring Bronze-filled PTFE Back-up rings Polyoxymethylene - POM Other grades of materials are available. Please refer to the materials table on the next page. TECHNICAL DATA Temperature -30°C / +115°C depending on the material selected Pressure 50 MPa Speed 1.5 m/s Media Mineral hydraulic oils Glycol/oil emulsions Water/oil The figures above indicate the maximum values and may not be cumulated. They may be developed, depending on the materials used. PISTON SEALS BECA 512 HYDRAULIC SEALS | PISTON SEALS | BECA 512
www.francejoint.com TABLE MATERIALS Friction ring Flexible ring Mating surface materialStandard code Type of material Colour Code Type of material Service temperature DB PTFE + 60% Bronze Dark brown K8 NBR 80 Shore A -30°C/+100°C Steel Chrome steel Cast iron G8 FKM 80 Shore A -20°C / +115°C* Other grades of materials are available depending on your specificities. * Temperature limited due to the combination of polyoxymethylene (POM) back-up rings HYDRAULIC SEALS | PISTON SEALS | BECA 512
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 ØD1 SØd1 20/30° C F_2 DIMENSIONS Part number Bore diameter ØD1 H9 Groove diameter Ød1 h9 Seal height Groove width L1 0/+0.20 Part number Bore diameter ØD1 H9 Groove diameter Ød1 h9 Seal height Groove width L1 0/+0.20 The figures highlighted in bold correspond to the bore diameters that are recommended by standard ISO 3320. Other intermediate sizes can be provided. * The codes that define the materials are set out in the materials table on the previous page. EXAMPLE OF CODIFICATION STANDARD CODIFICATION Materials ________ : Friction ring, PTFE + 60% Bronze - Code DB Bore diameter ____ : ØD1 = 50.00 mm Groove diameter __ : Ød1 + 36.00 mm Part number ______: 512. 050DBK8 Family Bore diameter Friction ring material* Profiled seal material* 512. 050 DB K8Part number - HYDRAULIC SEALS | PISTON SEALS | BECA 512