508S FRANCEJOINT | Alldatasheet

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DESCRIPTION The BECA 508S profile is a double acting composite piston seal composed of a filled PTFE friction ring, two static O'Rings and a dynamic rubber X'Ring. It follows the bore diameters, in line with the standards MIL-G-5514F and AS4716. ADVANTAGES Optimal sealing for separating two fluids Low friction coefficient; no stick-slip effect Excellent abrasion resistance Wide temperature range and excellent chemical resistance, depending on the material selected for the O'Rings APPLICATIONS Actuators Brakes systems Flight controls Engine systems Landing gear MATERIALS Friction ring Bronze-filled PTFE Carbon-filled PTFE Blue GL PTFE O'Rings NBR 70 Shore A FKM 70 Shore A X'Ring NBR 70 Shore A FKM 70 Shore A PISTON SEALS BECA 508S | TECHNICAL DATA Temperature -40°C / +200°C Pressure 35 MPa Speed 3 m/s Media Mineral oil-based hydraulic fluids Fire retardant hydraulic fluids Bio oils Phosphate esters Water The figures above indicate the maximum values and may not be cumulated. They may be developed, depending on the materials used. | 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 | RADIUS AND CHAMFERS Series Radius Chamfer CR1 min - max R2 min - max QUALITY & EXPERTISE FOR YOUR SEALING NEEDS AEROSPACE SEALS | PISTON SEALS | BECA 508S

| GROOVE WIDTHS AND EXTRUSION GAPS Series Width L1 min - max Extrusion gaps F O’Ring cross-section Ød2.1 X'Ring cross-section Ød2.2 | TOLERANCES ON THE BORE DIAMETERS AND GROOVE DIAMETERS Series Tolerance on bore diameter ØD1 Tolerance on groove diameter Ød1 ØD1 d2.2 d2.1 SØd1 20/30° C F_2 www.francejoint.com AEROSPACE SEALS | PISTON SEALS | BECA 508S

| DIMENSIONS Part number Series Bore diameter Groove diameter Groove width O'Ring Series X'Ring SeriesAS4716 / MIL-G-5514 ØD1 Ød1 L1 min 508.S325 325 47.42 37.97 7.14 128 031 508.S326 326 50.60 41.15 7.14 130 032 508.S327 327 53.80 44.35 7.14 132 033 508.S328 328 56.97 47.52 7.14 133 034 508.S329 329 60.15 50.70 7.14 135 035 508.S330 330 63.32 53.87 7.14 137 036 508.S331 331 66.50 57.05 7.14 139 037 508.S332 332 69.67 60.22 7.14 141 038 508.S333 333 72.85 63.40 7.14 143 039 508.S334 334 76.02 66.57 7.14 145 040 508.S335 335 79.20 69.75 7.14 147 041 508.S336 336 82.37 72.92 7.14 149 041 508.S337 337 85.55 76.10 7.14 151 042 508.S338 338 88.72 79.27 7.14 151 042 508.S339 339 91.90 82.45 7.14 152 043 508.S340 340 95.07 85.62 7.14 152 043 508.S341 341 98.25 88.80 7.14 153 044 508.S342 342 101.42 91.97 7.14 153 044 508.S343 343 104.60 95.15 7.14 154 045 508.S344 344 107.77 98.32 7.14 154 045 508.S345 345 110.95 101.50 7.14 155 046 508.S346 346 114.12 104.67 7.14 155 046 508.S347 347 117.30 107.85 7.14 156 047 508.S348 348 120.47 111.02 7.14 156 047 508.S349 349 123.65 114.20 7.14 157 048 508.S425 425 126.34 114.22 9.53 245 158 508.S426 426 129.51 117.40 9.53 246 158 508.S427 427 132.69 120.57 9.53 247 159 508.S428 428 135.86 123.75 9.53 248 159 508.S429 429 139.04 126.92 9.53 249 160 508.S430 430 142.21 130.10 9.53 250 160 508.S431 431 145.39 133.27 9.53 251 161 508.S432 432 148.56 136.45 9.53 252 161 508.S433 433 151.74 139.62 9.53 253 162 508.S434 434 154.91 142.80 9.53 254 162 508.S435 435 158.09 145.97 9.53 255 163 508.S436 436 161.26 149.15 9.53 256 163 508.S437 437 164.44 152.32 9.53 257 164 508.S438 438 170.79 158.67 9.53 259 165 508.S439 439 177.14 165.02 9.53 259 166 508.S440 440 183.49 171.37 9.53 260 167 508.S441 441 189.84 177.72 9.53 261 168 508.S442 442 196.19 184.07 9.53 262 169 508.S443 443 202.54 190.42 9.53 263 170 508.S444 444 208.89 196.77 9.53 264 171 508.S445 445 215.24 203.12 9.53 265 172 508.S446 446 227.94 215.82 9.53 267 174 508.S447 447 240.64 228.52 9.53 269 176 508.S448 448 253.34 241.22 9.53 271 178 508.S449 449 266.04 253.92 9.53 273 179 508.S450 450 278.74 266.62 9.53 275 180 508.S451 451 291.44 279.32 9.53 276 181 508.S452 452 304.14 292.02 9.53 277 182 508.S453 453 316.84 304.72 9.53 278 183 508.S454 454 329.54 317.42 9.53 278 184 508.S455 455 342.24 330.12 9.53 279 185 508.S456 456 354.94 342.82 9.53 279 186 508.S457 457 367.64 355.52 9.53 280 187 508.S458 458 380.34 368.22 9.53 280 188 508.S459 459 393.04 380.92 9.53 281 189 508.S460 460 405.74 393.62 9.53 281 190 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 EN-TETE CONTINU AEROSPACE SEALS | PISTON SEALS | BECA 508S