745 FRANCEJOINT | Alldatasheet

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Technical content

DESCRIPTION The BECA 745 - 747 roto seals are single or double acting rod rotary seals composed of a filled PTFE grooved friction ring and two rubber O'Rings. ADVANTAGES Low friction coefficient; no stick-slip effect on start up Excellent abrasion and extrusion resistance The grooves provide an integrated lubrication system Excellent dimensional stability APPLICATIONS Rotary distributors Handlers Hydraulic motors MATERIALS Friction ring Bronze-filled PTFE Carbon-filled PTFE Virgin PTFE O'Rings NBR 70 Shore A FKM 70 Shore A ROTO SEALS BECA 745-747 | TECHNICAL DATA Temperature -30°C / +200°C Pressure 30 MPa Speed 2 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. | EXTRUSION GAPS Radial section S Radial gap F/2

10 MPa 20 MPa

2.45 0.15 0.10 3.75 0.20 0.15 5.50 0.25 0.20 7.75 0.30 0.25 10.50 0.30 0.25 14.00 0.45 0.30 | SURFACE ROUGHNESS Roughness Dynamic surface area Static surface area Ra 0.05 - 0.2 µm ≤1.6 µm Rz 0.4 - 1.6 µm ≤10.0 µm Rmax 0.63 - 2.5 µm ≤16.0 µm | CHAMFERS AND RADIUS Radial section S Radius Radius Chamfer C 2.45 0.20 0.40 2.00 3.75 0.20 0.60 2.50 5.50 0.20 1.00 3.50 7.75 0.20 1.30 5.00 10.50 0.20 1.80 6.50 14.00 0.20 2.50 17.50 ROTARY SEALS | ROTO SEALS | BECA 745 - 747 QUALITY & EXPERTISE FOR YOUR SEALING NEEDS

| TABLE MATERIALS Friction ring O'Rings 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 K6 NBR 70 Shore A -30°C/+100°C Steel Stainless steel Chrome steel Aluminium Bronze Cast iron Treated surface G6 FKM 70 Shore A -20°C/+200°C C6 EPDM 70 Shore A -45°C/+150°C F6 VMQ 70 Shore A -60°C/+200°C 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 K6 NBR 70 Shore A -30°C/+100°C G6 FKM 70 Shore A -20°C/+200°C C6 EPDM 70 Shore A -45°C/+150°C CG C PTFE + 23% Carbon + 2% Graphite Black K6 NBR 70 Shore A -30°C/+100°C G6 FKM 70 Shore A -20°C/+200°C C6 EPDM 70 Shore A -45°C/+150°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 K6 NBR 70 Shore A -30°C/+100°C Steel Chrome steel Cast iron G6 FKM 70 Shore A -20°C/+200°C VM M PTFE + 15 % Glass + 5% MOS2 Grey K6 NBR 70 Shore A -30°C/+100°C G6 FKM 70 Shore A -20°C/+200°C DX X PTFE GL Blue + Glass + Metal oxides Turquoise blue Resistance to compression Resistance to wear Excellent chemical stability Good thermal conductivity K6 NBR 70 Shore A -30°C/+100°C G6 FKM 70 Shore A -20°C/+200°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

K6 NBR 70 Shore A -30°C/+100°C Steel Stainless steel Chrome steel Aluminium Bronze Cast iron Treated surface G6 FKM 70 Shore A -20°C/+200°C C6 EPDM 70 Shore A -45°C/+150°C K1 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 K6 NBR 70 Shore A -30°C/+100°C G6 FKM 70 Shore A -20°C/+200°C C6 EPDM 70 Shore A -45°C/+150°C K2 K PTFE + 20% Ekonol Light brown K6 NBR 70 Shore A -30°C/+100°C G6 FKM 70 Shore A -20°C/+200°C C6 EPDM 70 Shore A -45°C/+150°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 K6 NBR 70 Shore A -30°C/+100°C Steel Chrome steel Cast iron G6 FKM 70 Shore A -20°C/+200°C B4 B PTFE + 40% Bronze Dark brown K6 NBR 70 Shore A -30°C/+100°C G6 FKM 70 Shore A -20°C/+200°C Other grades of materials are available depending on your specificities. ROTARY SEALS | ROTO SEALS | BECA 745 - 747 www.francejoint.com

Ød2 10/20° C P L1 Ød1 S ØD1 F_2 | INSTALLATION DIMENSIONS Rod diameter Ød1 f8/h9 Groove diameter ØD1 H9 Groove width O’Rings cross-section BECA 745 Standard range BECA 747 Heavy-duty range v < 0.2 p < 2.5 0.2 < v < 0.5 2.5 < p < 5.0 0.5 < v < 1.0 5.0 < p < 25.0 1.0 < v < 2.0 25.0 < p < 40.0 2.0 < v < 5.0 40.0 < p < 50.0 L1 0/+0.20 Ød2 The speed "v" is expressed in m/s The pressure "p" is expressed in MPa For special applications > 40 MPa, we recommend using an H8/f8 tolerance (bore/groove) or selecting other, more suitable materials. Please contact our experts. * 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 Rod diameter _____: Ød1 = 50.00 mm Groove diameter __ : ØD1 = 58.40 mm Part number ______: 745. 050DBK6 Family Rod diameter Friction ring material* O'Ring materials* 745. 050 DB K6Part number - ROTARY SEALS | ROTO SEALS | BECA 745 - 747 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