340 FRANCEJOINT | Alldatasheet
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QUALITY & EXPERTISE FOR YOUR SEALING NEEDS || EXTRUSION GAPS Radial section S Radial gap F/2
2 MPa 10 MPa 20 MPa 40 MPa
|| 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 Chamfer C 1.45 0.40 3.00 2.25 0.40 3.00 3.10 0.60 3.00 4.70 0.80 3.00 6.10 0.80 3.50 9.50 0.80 6.50 |DESCRIPTION The BECA 340 profile is a single acting rod seal composed of a profiled, filled PTFE U-ring type seal and a V-spring that is resistant to corrosion. The BECA 349 profile is specially designed for applications where the seal is in contact with food products. It is characterised by a silicone overmoulding on the inside of the seal, which completely hides the V-spring, thus preventing impurities from accumulating in this hard-to-clean area. |ADVANTAGES Wide temperature range and excellent chemical resistance Low friction coefficient; no stick-slip effect Excellent abrasion resistance Good dimensional stability Non-toxic material |APPLICATIONS Food & Beverage Medical Pharmaceutical Static hydraulics |MATERIALS Profiled seal Carbon-filled PTFE Blue GL PTFE PE-UHMW V-Shaped spring Stainless steel Other grades of materials are available. Please refer to the materials table on the next page. || TECHNICAL DATA Temperature -200°C / +260°C Pressure 40 MPa Speed 15 m/s Media Practically all types of fluids, and chemical and gas products The figures above indicate the maximum values and may not be cumulated. They may be developed, depending on the materials used. ROD SEALS BECA 340-349 HYDRAULIC SEALS | ROD SEALS | BECA 340 - 349
www.francejoint.com || TABLE MATERIALS Other grades of materials are available depending on your specificities. Profiled seal V-spring Mating surface materialStandard code ISO code Material Colour Characteristics Code Type of material Service temperature DP P Virgin PTFE White Resistance to chemical products Impermeability Dielectric Non-stick Low friction coefficient Food industry I X10 Cr Ni 18-8 -200°C/+260°C Steel Stainless steel Chrome steel Aluminium Bronze Cast iron Treated surface DC C PTFE + 25% Carbon Grey Improvements
- Wear properties
- Compression set Good resistance to chemical products Thermal and electrical conductivity Anti-static High-performing in compression-based dynamic applications I X10 Cr Ni 18-8 -200°C/+260°C CG C PTFE + 23% Carbon + 2% Graphite Black I X10 Cr Ni 18-8 -200°C/+260°C DV V PTFE + 25 % Glass Blue Improvements
- Wear properties
- Mechanical strength Slightly more abrasive, however, this is corrected by adding MOS2 Maintains its chemical and dielectric properties Well-suited to applications with rotational and simultaneous alternating movements I X10 Cr Ni 18-8 -200°C/+260°C Steel Chrome steel Cast iron VM M PTFE + 15 % Glass + 5% MOS2 Grey I X10 Cr Ni 18-8 -200°C/+260°C DX X PTFE GL Blue + Glass + Metal oxides Turquoise blue Resistance to compression Resistance to wear Excellent chemical stability Good thermal conductivity I X10 Cr Ni 18-8 -200°C/+260°C DG G PTFE + 15% Graphite Black Improvements
- Wear properties Reduced wear on metal parts Self-lubricating Thermal and electrical conductivity Low permeability Good friction coefficient Anti-static High performing in dynamic self-lubricating
applications
I X10 Cr Ni 18-8 -200°C/+260°C Steel Stainless steel Chrome steel Aluminium Bronze Cast iron Treated surfaceK1 K PTFE + 10% Ekonol Light brown Improvements
- Better abrasion resistance
- Better dimensional stability at high temperatures Use up to +300°C Good friction coefficient and low permeability I X10 Cr Ni 18-8 -200°C/+260°C K2 K PTFE + 20% Ekonol Light brown I X10 Cr Ni 18-8 -200°C/+260°C DB B PTFE + 60% Bronze Dark brown Improvements
- Wear properties
- Warping resistance and creep strength
- Compression resistance Self-lubricating Electrical and thermal conductivity Does not alter the metal parts Reduced hold with certain chemical products Used for high-compression dynamic seals and has a low level of wear I X10 Cr Ni 18-8 -200°C/+260°C Steel Chrome steel Cast ironB4 B PTFE + 40% Bronze Dark brown I X10 Cr Ni 18-8 -200°C/+260°C HG HG PE-UHMW White or off-white Excellent wear resistance on contact with water and air I X10 Cr Ni 18-8 -70°C/+80°C Steel Stainless steel Chrome steel Aluminium Bronze Cast iron Treated surface HYDRAULIC SEALS | ROD SEALS | BECA 340 - 349
www.francejoint.com ØD1 SØd1 F_2 H1H1 ØA 30° BECA 349 BECA 340 || INSTALLATION DIMENSIONS Series Rod diameter Ød1 h9 Groove diameter Groove width Radial section Step height Standard range Extended range ØD1 H9 L1 0/+0.20 S ØD1 - A For special applications > 40 MPa, we recommend using an H8/f8 tolerance (groove/rod) or selecting other, more suitable materials. Please contact our experts. *Only BECA 340.0 profiles are fitted with an O'Ring instead of a V-spring. * The codes that define the materials are set out in the materials table on the previous page. || EXAMPLE OF CODIFICATION STANDARD CODIFICATION Materials ________ : 60% Bronze-filled PTFE profiled seal- Code DB Rod diameter _____: Ød1 = 50.00 mm Groove diameter __ : ØD1 = 59.40 mm Part number ______: 340. 3050DBI Family Rod diameter Profiled seal material* V-Shaped spring material* 340.3. 050 DB IPart number - HYDRAULIC SEALS | ROD SEALS | BECA 340 - 349
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 || DIMENSIONS Part number Rod diameter Ød1 h9 Groove diameter ØD1 H9 Seal height Groove width L1 0/+0.20 Part number Rod diameter Ød1 h9 Groove diameter ØD1 H9 Seal height Groove width L1 0/+0.20 The figures highlighted in bold correspond to the rod diameters that are recommended by standard ISO 3320. Other intermediate sizes can be provided. HYDRAULIC SEALS | ROD SEALS | BECA 340 - 349