ABKEndless Back-up ring
Back-up Ring, closed ring design, installed with O-Ring. Concave side design allows the O-Ring to maintain its shape even in the presence of high pressures peaks. Standard material: Nitrile, available, on request, in different compounds.
Seal capabilities
- Temperature: from -40 to 120 °C
- Max. pressure: 400 bar
- Max. speed: 0,5 m/s
Applications
This product is interchangeable with:
STU - PBK - BA - BB - AM - K81
STU 235,4 3 1 NB9018 STU 235,4 3,0 1,0 NB9018 STU 235.4 3.0 1.0 NB9018 STU 271 PBK 8-271 Parback 8-271 Parbak 8-271 Prädifa Parker Parbak
STU 228 STU 57,7 3 1 NB9018 STU 57,7 3,0 1,0 NB9018 STU 57.7 3.0 1.0 NB9018 PBK 8-228 Parback 8-228 Parbak 8-228 Prädifa Parker Parbak
STU 124,2 3 1 NB9018 STU 124,2 3,0 1,0 NB9018 STU 124.2 3.0 1.0 NB9018 STU 249 PBK 8-249 Parback 8-249 Parbak 8-249 Prädifa Parker Parbak
STU 248,1 3 1 NB9018 STU 248,1 3,0 1,0 NB9018 STU 248.1 3.0 1.0 NB9018 STU 273 PBK 8-273 Parback 8-273 Parbak 8-273 Prädifa Parker Parbak
STU 117,6 3 1 NB9018 STU 117,6 3,0 1,0 NB9018 STU 117.6 3.0 1.0 NB9018 STU 247 PBK 8-247 Parback 8-247 Parbak 8-247 Prädifa Parker Parbak
STU 267,1 3 1 NB9018 STU 267,1 3,0 1,0 NB9018 STU 267.1 3.0 1.0 NB9018 STU 275 PBK 8-275 Parback 8-275 Parbak 8-275 Prädifa Parker Parbak
STU 111,2 3 1 NB9018 STU 111,2 3,0 1,0 NB9018 STU 111.2 3.0 1.0 NB9018 STU 245 PBK 8-245 Parback 8-245 Parbak 8-245 Prädifa Parker Parbak
STU 233 STU 73,1 3 1 NB9018 STU 73,1 3,0 1,0 NB9018 STU 73.1 3.0 1.0 NB9018 PBK 8-233 Parback 8-233 Parbak 8-233 Prädifa Parker Parbak
STU 140,1 3 1 NB9018 STU 140,1 3,0 1,0 NB9018 STU 140.1 3.0 1.0 NB9018 STU 254 PBK 8-254 Parback 8-254 Parbak 8-254 Prädifa Parker Parbak
STU 216,3 3 1 NB9018 STU 216,3 3,0 1,0 NB9018 STU 216.3 3.0 1.0 NB9018 STU 268 PBK 8-268 Parback 8-268 Parbak 8-268 Prädifa Parker Parbak
STU 231 STU 66,8 3 1 NB9018 STU 66,8 3,0 1,0 NB9018 STU 66.8 3.0 1.0 NB9018 PBK 8-231 Parback 8-231 Parbak 8-231 Prädifa Parker Parbak
STU 133,8 3 1 NB9018 STU 133,8 3,0 1,0 NB9018 STU 133.8 3.0 1.0 NB9018 STU 252 PBK 8-252 Parback 8-252 Parbak 8-252 Prädifa Parker Parbak
STU 127,4 3 1 NB9018 STU 127,4 3,0 1,0 NB9018 STU 127.4 3.0 1.0 NB9018 STU 250 PBK 8-250 Parback 8-250 Parbak 8-250 Prädifa Parker Parbak
STU 165,5 3 1 NB9018 STU 165,5 3,0 1,0 NB9018 STU 165.5 3.0 1.0 NB9018 STU 260 PBK 8-260 Parback 8-260 Parbak 8-260 Prädifa Parker Parbak
STU 238 STU 89 3 1 NB9018 STU 89,0 3,0 1,0 NB9018 STU 89.0 3.0 1.0 NB9018 PBK 8-238 Parback 8-238 Parbak 8-238 Prädifa Parker Parbak
STU 178,2 3 1 NB9018 STU 178,2 3,0 1,0 NB9018 STU 178.2 3.0 1.0 NB9018 STU 262 PBK 8-262 Parback 8-262 Parbak 8-262 Prädifa Parker Parbak
STU 236 STU 82,7 3 1 NB9018 STU 82,7 3,0 1,0 NB9018 STU 82.7 3.0 1.0 NB9018 PBK 8-236 Parback 8-236 Parbak 8-236 Prädifa Parker Parbak
STU 159,2 3 1 NB9018 STU 159,2 3,0 1,0 NB9018 STU 159.2 3.0 1.0 NB9018 STU 259 PBK 8-259 Parback 8-259 Parbak 8-259 Prädifa Parker Parbak
STU 190,9 3 1 NB9018 STU 190,9 3,0 1,0 NB9018 STU 190.9 3.0 1.0 NB9018 STU 264 PBK 8-264 Parback 8-264 Parbak 8-264 Prädifa Parker Parbak
STU 234 STU 76,3 3 1 NB9018 STU 76,3 3,0 1,0 NB9018 STU 76.3 3.0 1.0 NB9018 PBK 8-234 Parback 8-234 Parbak 8-234 Prädifa Parker Parbak
STU 149,6 3 1 NB9018 STU 149,6 3,0 1,0 NB9018 STU 149.6 3.0 1.0 NB9018 STU 257 PBK 8-257 Parback 8-257 Parbak 8-257 Prädifa Parker Parbak
STU 203,6 3 1 NB9018 STU 203,6 3,0 1,0 NB9018 STU 203.6 3.0 1.0 NB9018 STU 266 PBK 8-266 Parback 8-266 Parbak 8-266 Prädifa Parker Parbak
STU 104,9 3 1 NB9018 STU 104,9 3,0 1,0 NB9018 STU 104.9 3.0 1.0 NB9018 STU 243 PBK 8-243 Parback 8-243 Parbak 8-243 Prädifa Parker Parbak
STU 241 STU 98,5 3 1 NB9018 STU 98,5 3,0 1,0 NB9018 STU 98.5 3.0 1.0 NB9018 PBK 8-241 Parback 8-241 Parbak 8-241 Prädifa Parker Parbak
STU 229 STU 60,8 3 1 NB9018 STU 60,8 3,0 1,0 NB9018 STU 60.8 3.0 1.0 NB9018 PBK 8-229 Parback 8-229 Parbak 8-229 Prädifa Parker Parbak
STU 229 3 1 NB9018 STU 229,0 3,0 1,0 NB9018 STU 229.0 3.0 1.0 NB9018 STU 270 PBK 8-270 Parback 8-270 Parbak 8-270 Prädifa Parker Parbak
STU 227 STU 54,5 3 1 NB9018 STU 54,5 3,0 1,0 NB9018 STU 54.5 3.0 1.0 NB9018 PBK 8-227 Parback 8-227 Parbak 8-227 Prädifa Parker Parbak
STU 241,7 3 1 NB9018 STU 241,7 3,0 1,0 NB9018 STU 241.7 3.0 1.0 NB9018 STU 272 PBK 8-272 Parback 8-272 Parbak 8-272 Prädifa Parker Parbak
STU 121,1 3 1 NB9018 STU 121,1 3,0 1,0 NB9018 STU 121.1 3.0 1.0 NB9018 STU 248 PBK 8-248 Parback 8-248 Parbak 8-248 Prädifa Parker Parbak
STU 254,4 3 1 NB9018 STU 254,4 3,0 1,0 NB9018 STU 254.4 3.0 1.0 NB9018 STU 274 PBK 8-274 Parback 8-274 Parbak 8-274 Prädifa Parker Parbak
STU 114,4 3 1 NB9018 STU 114,4 3,0 1,0 NB9018 STU 114.4 3.0 1.0 NB9018 STU 246 PBK 8-246 Parback 8-246 Parbak 8-246 Prädifa Parker Parbak
STU 276 STU 279,8 3 1 NB9018 STU 279,8 3,0 1,0 NB9018 STU 279.8 3.0 1.0 NB9018 PBK 8-276 Parback 8-276 Parbak 8-276 Prädifa Parker Parbak
STU 232 STU 70 3 1 NB9018 STU 70,0 3,0 1,0 NB9018 STU 70.0 3.0 1.0 NB9018 PBK 8-232 Parback 8-232 Parbak 8-232 Prädifa Parker Parbak
STU 143,3 3 1 NB9018 STU 143,3 3,0 1,0 NB9018 STU 143.3 3.0 1.0 NB9018 STU 255 PBK 8-255 Parback 8-255 Parbak 8-255 Prädifa Parker Parbak
STU 267 PBK 8-267 Parback 8-267 Parbak 8-267 Prädifa Parker Parbak
STU 230 STU 64 3 1 NB9018 STU 64,0 3,0 1,0 NB9018 STU 64.0 3.0 1.0 NB9018 PBK 8-230 Parback 8-230 Parbak 8-230 Prädifa Parker Parbak
STU 136,9 3 1 NB9018 STU 136,9 3,0 1,0 NB9018 STU 136.9 3.0 1.0 NB9018 STU 253 PBK 8-253 Parback 8-253 Parbak 8-253 Prädifa Parker Parbak
STU 222,7 3 1 NB9018 STU 222,7 3,0 1,0 NB9018 STU 222.7 3.0 1.0 NB9018 STU 269 PBK 8-269 Parback 8-269 Parbak 8-269 Prädifa Parker Parbak
STU 130,6 3 1 NB9018 STU 130,6 3,0 1,0 NB9018 STU 130.6 3.0 1.0 NB9018 STU 251 PBK 8-251 Parback 8-251 Parbak 8-251 Prädifa Parker Parbak
STU 171,9 3 1 NB9018 STU 171,9 3,0 1,0 NB9018 STU 171.9 3.0 1.0 NB9018 STU 261 PBK 8-261 Parback 8-261 Parbak 8-261 Prädifa Parker Parbak
STU 239 STU 92,2 3 1 NB9018 STU 92,2 3,0 1,0 NB9018 STU 92.2 3.0 1.0 NB9018 PBK 8-239 Parback 8-239 Parbak 8-239 Prädifa Parker Parbak
STU 184,6 3 1 NB9018 STU 184,6 3,0 1,0 NB9018 STU 184.6 3.0 1.0 NB9018 STU 263 PBK 8-263 Parback 8-263 Parbak 8-263 Prädifa Parker Parbak
STU 237 STU 85,8 3 1 NB9018 STU 85,8 3,0 1,0 NB9018 STU 85.8 3.0 1.0 NB9018 PBK 8-237 Parback 8-237 Parbak 8-237 Prädifa Parker Parbak
STU 152,8 3 1 NB9018 STU 152,8 3,0 1,0 NB9018 STU 152.8 3.0 1.0 NB9018 STU 258 PBK 8-258 Parback 8-258 Parbak 8-258 Prädifa Parker Parbak
STU 197,3 3 1 NB9018 STU 197,3 3,0 1,0 NB9018 STU 197.3 3.0 1.0 NB9018 STU 265 PBK 8-265 Parback 8-265 Parbak 8-265 Prädifa Parker Parbak
STU 235 STU 79,5 3 1 NB9018 STU 79,5 3,0 1,0 NB9018 STU 79.5 3.0 1.0 NB9018 PBK 8-235 Parback 8-235 Parbak 8-235 Prädifa Parker Parbak
STU 146,5 3 1 NB9018 STU 146,5 3,0 1,0 NB9018 STU 146.5 3.0 1.0 NB9018 STU 256 PBK 8-256 Parback 8-256 Parbak 8-256 Prädifa Parker Parbak
STU 108,1 3 1 NB9018 STU 108,1 3,0 1,0 NB9018 STU 108.1 3.0 1.0 NB9018 STU 244 PBK 8-244 Parback 8-244 Parbak 8-244 Prädifa Parker Parbak
STU 101,7 3 1 NB9018 STU 101,7 3,0 1,0 NB9018 STU 101.7 3.0 1.0 NB9018 STU 242 PBK 8-242 Parback 8-242 Parbak 8-242 Prädifa Parker Parbak
STU 240 STU 95,4 3 1 NB9018 STU 95,4 3,0 1,0 NB9018 STU 95.4 3.0 1.0 NB9018 PBK 8-240 Parback 8-240 Parbak 8-240 Prädifa Parker Parbak
Search by code
| Description | O-Ring Ref. | Ø d | L1 | L2 | C | S | ||
|---|---|---|---|---|---|---|---|---|
| ABK 227 BN90 | 4212 - 227 | 53,57 | 6,20 | 7,60 | 1,40 | 3,10 | NBR 90Sh.A - Nitrile | |
| ABK 228 BN90 | 4225 - 228 | 56,74 | 6,20 | 7,60 | 1,40 | 3,10 | NBR 90Sh.A - Nitrile | |
| ABK 229 BN90 | 4237 - 229 | 59,92 | 6,20 | 7,60 | 1,40 | 3,10 | NBR 90Sh.A - Nitrile | |
| ABK 230 BN90 | 4250 - 230 | 63,09 | 6,20 | 7,60 | 1,40 | 3,10 | NBR 90Sh.A - Nitrile | |
| ABK 231 BN90 | 4262 - 231 | 66,27 | 6,20 | 7,60 | 1,40 | 3,10 | NBR 90Sh.A - Nitrile | |
| ABK 232 BN90 | 4275 - 232 | 69,44 | 6,20 | 7,60 | 1,40 | 3,10 | NBR 90Sh.A - Nitrile | |
| ABK 233 BN90 | 4287 - 233 | 72,62 | 6,20 | 7,60 | 1,40 | 3,10 | NBR 90Sh.A - Nitrile | |
| ABK 234 BN90 | 4300 - 234 | 75,79 | 6,20 | 7,60 | 1,40 | 3,10 | NBR 90Sh.A - Nitrile | |
| ABK 235 BN90 | 4312 - 235 | 78,97 | 6,20 | 7,60 | 1,40 | 3,10 | NBR 90Sh.A - Nitrile | |
| ABK 236 BN90 | 4325 - 236 | 82,14 | 6,20 | 7,60 | 1,40 | 3,10 | NBR 90Sh.A - Nitrile | |
| ABK 237 BN90 | 4337 - 237 | 85,32 | 6,20 | 7,60 | 1,40 | 3,10 | NBR 90Sh.A - Nitrile | |
| ABK 238 BN90 | 4350 - 238 | 88,49 | 6,20 | 7,60 | 1,40 | 3,10 | NBR 90Sh.A - Nitrile | |
| ABK 239 BN90 | 4362 - 239 | 91,67 | 6,20 | 7,60 | 1,40 | 3,10 | NBR 90Sh.A - Nitrile | |
| ABK 240 BN90 | 4375 - 240 | 94,84 | 6,20 | 7,60 | 1,40 | 3,10 | NBR 90Sh.A - Nitrile | |
| ABK 241 BN90 | 4387 - 241 | 98,02 | 6,20 | 7,60 | 1,40 | 3,10 | NBR 90Sh.A - Nitrile | |
| ABK 242 BN90 | 4400 - 242 | 101,19 | 6,20 | 7,60 | 1,40 | 3,10 | NBR 90Sh.A - Nitrile | |
| ABK 243 BN90 | 4412 - 243 | 104,37 | 6,20 | 7,60 | 1,40 | 3,10 | NBR 90Sh.A - Nitrile | |
| ABK 244 BN90 | 4425 - 244 | 107,54 | 6,20 | 7,60 | 1,40 | 3,10 | NBR 90Sh.A - Nitrile | |
| ABK 245 BN90 | 4437 - 245 | 110,72 | 6,20 | 7,60 | 1,40 | 3,10 | NBR 90Sh.A - Nitrile | |
| ABK 246 BN90 | 4450 - 246 | 113,89 | 6,20 | 7,60 | 1,40 | 3,10 | NBR 90Sh.A - Nitrile | |
| ABK 247 BN90 | 4462 - 247 | 117,07 | 6,20 | 7,60 | 1,40 | 3,10 | NBR 90Sh.A - Nitrile | |
| ABK 248 BN90 | 4475 - 248 | 120,24 | 6,20 | 7,60 | 1,40 | 3,10 | NBR 90Sh.A - Nitrile | |
| ABK 249 BN90 | 4487 - 249 | 123,42 | 6,20 | 7,60 | 1,40 | 3,10 | NBR 90Sh.A - Nitrile | |
| ABK 250 BN90 | 4500 - 250 | 126,59 | 6,20 | 7,60 | 1,40 | 3,10 | NBR 90Sh.A - Nitrile | |
| ABK 251 BN90 | 4512 - 251 | 129,77 | 6,20 | 7,60 | 1,40 | 3,10 | NBR 90Sh.A - Nitrile | |
| ABK 252 BN90 | 4525 - 252 | 132,94 | 6,20 | 7,60 | 1,40 | 3,10 | NBR 90Sh.A - Nitrile | |
| ABK 253 BN90 | 4537 - 253 | 136,12 | 6,20 | 7,60 | 1,40 | 3,10 | NBR 90Sh.A - Nitrile | |
| ABK 254 BN90 | 4550 - 254 | 139,29 | 6,20 | 7,60 | 1,40 | 3,10 | NBR 90Sh.A - Nitrile | |
| ABK 255 BN90 | 4562 - 255 | 142,47 | 6,20 | 7,60 | 1,40 | 3,10 | NBR 90Sh.A - Nitrile | |
| ABK 256 BN90 | 4575 - 256 | 145,64 | 6,20 | 7,60 | 1,40 | 3,10 | NBR 90Sh.A - Nitrile | |
| ABK 257 BN90 | 4587 - 257 | 148,82 | 6,20 | 7,60 | 1,40 | 3,10 | NBR 90Sh.A - Nitrile | |
| ABK 258 BN90 | 4600 - 258 | 151,99 | 6,20 | 7,60 | 1,40 | 3,10 | NBR 90Sh.A - Nitrile | |
| ABK 259 BN90 | 4625 - 259 | 158,34 | 6,20 | 7,60 | 1,40 | 3,10 | NBR 90Sh.A - Nitrile | |
| ABK 260 BN90 | 4650 - 260 | 164,69 | 6,20 | 7,60 | 1,40 | 3,10 | NBR 90Sh.A - Nitrile | |
| ABK 261 BN90 | 4675 - 261 | 171,05 | 6,20 | 7,60 | 1,40 | 3,10 | NBR 90Sh.A - Nitrile | |
| ABK 262 BN90 | 4700 - 262 | 177,39 | 6,20 | 7,60 | 1,40 | 3,10 | NBR 90Sh.A - Nitrile | |
| ABK 263 BN90 | 4725 - 263 | 183,74 | 6,20 | 7,60 | 1,40 | 3,10 | NBR 90Sh.A - Nitrile | |
| ABK 264 BN90 | 4750 - 264 | 190,09 | 6,20 | 7,60 | 1,40 | 3,10 | NBR 90Sh.A - Nitrile | |
| ABK 265 BN90 | 4775 - 265 | 196,44 | 6,20 | 7,60 | 1,40 | 3,10 | NBR 90Sh.A - Nitrile | |
| ABK 266 BN90 | 4800 - 266 | 202,79 | 6,20 | 7,60 | 1,40 | 3,10 | NBR 90Sh.A - Nitrile | |
| ABK 267 BN90 | 4825 - 267 | 209,14 | 6,20 | 7,60 | 1,40 | 3,10 | NBR 90Sh.A - Nitrile | |
| ABK 268 BN90 | 4850 - 268 | 215,49 | 6,20 | 7,60 | 1,40 | 3,10 | NBR 90Sh.A - Nitrile | |
| ABK 269 BN90 | 4875 - 269 | 221,84 | 6,20 | 7,60 | 1,40 | 3,10 | NBR 90Sh.A - Nitrile | |
| ABK 270 BN90 | 4900 - 270 | 228,19 | 6,20 | 7,60 | 1,40 | 3,10 | NBR 90Sh.A - Nitrile | |
| ABK 271 BN90 | 4925 - 271 | 234,54 | 6,20 | 7,60 | 1,40 | 3,10 | NBR 90Sh.A - Nitrile | |
| ABK 272 BN90 | 4950 - 272 | 240,89 | 6,20 | 7,60 | 1,40 | 3,10 | NBR 90Sh.A - Nitrile | |
| ABK 273 BN90 | 4975 - 273 | 247,20 | 6,20 | 7,60 | 1,40 | 3,10 | NBR 90Sh.A - Nitrile | |
| ABK 274 BN90 | 41000 - 274 | 253,69 | 6,20 | 7,60 | 1,40 | 3,10 | NBR 90Sh.A - Nitrile | |
| ABK 275 BN90 | 41050 - 275 | 266,29 | 6,20 | 7,60 | 1,40 | 3,10 | NBR 90Sh.A - Nitrile | |
| ABK 276 BN90 | 41100 - 276 | 278,99 | 6,20 | 7,60 | 1,40 | 3,10 | NBR 90Sh.A - Nitrile |
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