740 FRANCEJOINT | Alldatasheet

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Technical content

QUALITY & EXPERTISE FOR YOUR SEALING NEEDS DESCRIPTION The BECA 740 is a symmetrical dynamic and static facial effect U-seal, made from PTFE (different filling options) with lips that are pre-stressed by a spring. Derived from the BECA 740 profile, the BECA 749 profile is made specially for food industry applications. The V-spring is replaced with a VMQ O'Ring. 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 Bronze-filled PTFE Carbon-filled PTFE 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 30 MPa Speed 15 m/s Media Mineral hydraulic oils Fire-resistant liquids Biocompatible fluids Water Others (contact our experts) The figures above indicate the maximum values and may not be cumulated. They may be developed, depending on the materials used. | SURFACE ROUGHNESS Roughness Hydrogen, helium, cryogenic gas, refrigerants Low viscosity fluids (water, alcohols, natural gases, air) High viscosity fluids (gear oils, dairy products, adhesives) Ra ≤0.3 µm ≤0.6 µm ≤0.8 µm Rz ≤2.2 µm ≤3.5 µm ≤5.0 µm Rmax ≤3.5 µm ≤5.0 µm ≤6.5 µm | RADIUS Groove depth h Radius 1.45 0.40 2.25 0.40 3.10 0.60 4.70 0.80 6.10 0.80 9.50 0.80 STATIC SEALS BECA 740-749 STATIC SEALS | | BECA 740 - 749

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 STATIC SEALS | | BECA 740 - 749

ØD1 h P BECA 749 BECA 740 | INSTALLATION DIMENSIONS - STANDARD SERIES Series Groove outside diameter ØD1 H10 Groove width L4 0/+0.15 Groove depth Standard range Extended range h Tol. *Only BECA 740.0 profiles are fitted with an O'Ring instead of a V-spring. | INSTALLATION DIMENSIONS - ADDITIONAL SERIES Series Groove outside diameter ØD1 H10 Groove width L4 0/+0.15 Groove depth h Tol. 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 STATIC SEALS | | BECA 740 - 749