841 FRANCEJOINT | Alldatasheet
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DESCRIPTION The BECA 841 - 843 roto seals are single or double acting piston rotary seals composed of a filled PTFE grooved friction ring and a rubber O'Ring. 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'Ring NBR 70 Shore A FKM 70 Shore A ROTO SEALS BECA 841-843 | 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 841 - 843 QUALITY & EXPERTISE FOR YOUR SEALING NEEDS
| TABLE MATERIALS Friction ring O'Ring 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 HG HG PE-UHMW White or off-white Excellent wear resistance on contact with water and air K6 NBR 70 Shore A -30°C/+80°C Steel Stainless steel Chrome steel Aluminium Bronze Cast iron Treated surface PU U Polyurethane Blue Strong mechanical resistance Good resistance to wear and abrasion High elasticity modulus Good flexibility Very good resistance to ozone and oxidation K6 NBR 70 Shore A -30°C/+90°C PUHT U High- temperature polyurethane White or off-white K6 NBR 70 Shore A -30°C/+100°C Other grades of materials are available depending on your specificities. ROTARY SEALS | ROTO SEALS | BECA 841 - 843 www.francejoint.com
Ød2 P L1 C 10/20° Ød1 S ØD1 R2 F_2 | INSTALLATION DIMENSIONS Bore diameter ØD1 H9 Groove diameter Groove width Radial section O’Ring cross-section Number of grooves BECA 843 Standard range BECA 841 Heavy-duty range Ød1 h9 L1 0/+0.20 S Ød2 For special applications > 30 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 Bore diameter ____ : ØD1 = 50.00 mm Groove diameter __ : Ød1 = 42.50 mm Part number ______: 843. 050DBK6 Family Rod diameter Friction ring material* O'Ring material* 843. 050 DB K6Part number - ROTARY SEALS | ROTO SEALS | BECA 841 - 843 www.francejoint.com
| DIMENSIONS Part number Bore diameter Ød1 H9 Groove diameter Ød1 h9 Groove width L1 0/+0.20 843.008 8.00 3.10 2.20 843.009 9.00 4.10 2.20 843.010 10.00 5.10 2.20 843.012 12.00 7.10 2.20 841.014 14.00 6.50 3.20 843.014 14.00 9.10 2.20 841.015 15.00 7.50 3.20 843.015 15.00 10.10 2.20 841.016 16.00 8.50 3.20 843.016 16.00 11.10 2.20 841.018 18.00 10.50 3.20 843.018 18.00 13.10 2.20 841.020 20.00 12.50 3.20 843.020 20.00 15.10 2.20 841.022 22.00 14.50 3.20 843.022 22.00 17.10 2.20 841.025 25.00 17.50 3.20 843.025 25.00 20.10 2.20 841.028 28.00 20.50 3.20 843.028 28.00 23.10 2.20 841.030 30.00 22.50 3.20 843.030 30.00 25.10 2.20 841.032 32.00 24.50 3.20 843.032 32.00 27.10 2.20 841.035 35.00 27.50 3.20 843.035 35.00 30.10 2.20 841.038 38.00 30.50 3.20 843.038 38.00 33.10 2.20 841.040 40.00 29.00 4.20 843.040 40.00 32.50 3.20 841.042 42.00 31.00 4.20 843.042 42.00 34.50 3.20 841.045 45.00 34.00 4.20 843.045 45.00 37.50 3.20 841.048 48.00 37.00 4.20 843.048 48.00 40.50 3.20 841.050 50.00 39.00 4.20 843.050 50.00 42.50 3.20 841.052 52.00 41.00 4.20 843.052 52.00 44.50 3.20 841.055 55.00 44.00 4.20 843.055 55.00 47.50 3.20 841.058 58.00 47.00 4.20 843.058 58.00 50.50 3.20 841.060 60.00 49.00 4.20 843.060 60.00 52.50 3.20 841.062 62.00 51.00 4.20 843.062 62.00 54.50 3.20 841.063 63.00 52.00 4.20 843.063 63.00 55.50 3.20 841.065 65.00 54.00 4.20 843.065 65.00 57.50 3.20 841.070 70.00 59.00 4.20 843.070 70.00 62.50 3.20 841.072 72.00 61.00 4.20 843.072 72.00 64.50 3.20 841.075 75.00 64.00 4.20 843.075 75.00 67.50 3.20 841.078 78.00 67.00 4.20 843.078 78.00 70.50 3.20 841.080 80.00 64.50 6.30 843.080 80.00 69.00 4.20 Part number Bore diameter Ød1 H9 Groove diameter Ød1 h9 Groove width L1 0/+0.20 841.082 82.00 66.50 6.30 843.082 82.00 71.00 4.20 841.085 85.00 69.50 6.30 843.085 85.00 74.00 4.20 841.090 90.00 74.50 6.30 843.090 90.00 79.00 4.20 841.095 95.00 79.50 6.30 843.095 95.00 84.00 4.20 841.100 100.00 84.50 6.30 843.100 100.00 89.00 4.20 841.105 105.00 89.50 6.30 843.105 105.00 94.00 4.20 841.110 110.00 94.50 6.30 843.110 110.00 99.00 4.20 841.115 115.00 99.50 6.30 843.115 115.00 104.00 4.20 841.120 120.00 104.50 6.30 843.120 120.00 109.00 4.20 841.125 125.00 109.50 6.30 843.125 125.00 114.00 4.20 841.130 130.00 114.50 6.30 843.130 130.00 119.00 4.20 841.135 135.00 114.00 8.10 843.135 135.00 119.50 6.30 841.140 140.00 119.00 8.10 843.140 140.00 124.50 6.30 841.145 145.00 124.00 8.10 843.145 145.00 129.50 6.30 841.150 150.00 129.00 8.10 843.150 150.00 134.50 6.30 841.155 155.00 134.00 8.10 843.155 155.00 139.50 6.30 841.160 160.00 139.00 8.10 843.160 160.00 144.50 6.30 841.165 165.00 144.00 8.10 843.165 165.00 149.50 6.30 841.170 170.00 149.00 8.10 843.170 170.00 154.50 6.30 841.175 175.00 154.00 8.10 843.175 175.00 159.50 6.30 841.180 180.00 159.00 8.10 843.180 180.00 164.50 6.30 841.190 190.00 169.00 8.10 843.190 190.00 174.50 6.30 841.200 200.00 179.00 8.10 843.200 200.00 184.50 6.30 841.210 210.00 189.00 8.10 843.210 210.00 194.50 6.30 841.220 220.00 199.00 8.10 843.220 220.00 204.50 6.30 841.230 230.00 209.00 8.10 843.230 230.00 214.50 6.30 841.240 240.00 219.00 8.10 843.240 240.00 224.50 6.30 841.250 250.00 229.00 8.10 843.250 250.00 234.50 6.30 841.260 260.00 239.00 8.10 843.260 260.00 244.50 6.30 841.270 270.00 249.00 8.10 843.270 270.00 254.50 6.30 841.280 280.00 259.00 8.10 843.280 280.00 264.50 6.30 ROTARY SEALS | ROTO SEALS | BECA 841 - 843 www.francejoint.com
Ød1 H9 Groove diameter Ød1 h9 Groove width L1 0/+0.20 841.290 290.00 269.00 8.10 843.290 290.00 274.50 6.30 841.300 300.00 279.00 8.10 843.300 300.00 284.50 6.30 841.310 310.00 289.00 8.10 843.310 310.00 294.50 6.30 841.320 320.00 299.00 8.10 843.320 320.00 304.50 6.30 841.330 330.00 302.00 9.50 843.330 330.00 309.00 8.10 841.340 340.00 312.00 9.50 843.340 340.00 319.00 8.10 841.350 350.00 322.00 9.50 843.350 350.00 329.00 8.10 841.360 360.00 332.00 9.50 843.360 360.00 339.00 8.10 841.370 370.00 342.00 9.50 843.370 370.00 349.00 8.10 841.380 380.00 352.00 9.50 843.380 380.00 359.00 8.10 841.390 390.00 362.00 9.50 843.390 390.00 369.00 8.10 841.400 400.00 372.00 9.50 843.400 400.00 379.00 8.10 841.410 410.00 382.00 9.50 843.410 410.00 389.00 8.10 841.420 420.00 392.00 9.50 843.420 420.00 399.00 8.10 Part number Bore diameter Ød1 H9 Groove diameter Ød1 h9 Groove width L1 0/+0.20 841.430 430.00 402.00 9.50 843.430 430.00 409.00 8.10 841.440 440.00 412.00 9.50 843.440 440.00 419.00 8.10 841.450 450.00 422.00 9.50 843.450 450.00 429.00 8.10 841.460 460.00 432.00 9.50 843.460 460.00 439.00 8.10 841.470 470.00 442.00 9.50 843.470 470.00 449.00 8.10 841.480 480.00 452.00 9.50 843.480 480.00 459.00 8.10 841.490 490.00 462.00 9.50 843.490 490.00 469.00 8.10 841.500 500.00 472.00 9.50 843.500 500.00 479.00 8.10 841.550 550.00 522.00 9.50 843.550 550.00 529.00 8.10 841.600 600.00 572.00 9.50 843.600 600.00 579.00 8.10 841.650 650.00 622.00 9.50 843.650 650.00 629.00 8.10 843.700 700.00 672.00 9.50 843.750 750.00 722.00 9.50 843.800 800.00 772.00 9.50 843.850 850.00 822.00 9.50 843.900 900.00 872.00 9.50 843.950 950.00 922.00 9.50 The figures highlighted in bold correspond to the bore diameters that are recommended by standard ISO 3320. Other intermediate sizes can be provided. ROTARY SEALS | ROTO SEALS | BECA 841 - 843 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