O Ring Backup Ring PTFE
O ring backup ring PTFE provides essential support for O rings, preventing extrusion and enhancing sealing performance. These durable rings reduce leaks, improve system efficiency, and extend the life of hydraulic components. Ideal for enhancing the reliability of hydraulic systems in heavy machinery.
Material: PTFE
Standard Color: White
Density: 2.16 g/cm³
Min. Service Temperature: -200°C
Max. Service Temperature：260°C
Application: JIS or DIN Rubber O-Rings
Replacement Part Description:
Teflon backup rings are designed to prevent extrusion in o-ring sealing systems. Rubber O-rings generally serve as effective seals for dynamic and static applications in hydraulic and pneumatic systems equipment.
| O Ring size | Backup Ring Size | O Ring size | Backup Ring Size | |||||
| d1 | D1 | L1 | d1 | D1 | L1 | |||
| 3.8×1.9 (P4) | 4 | 7 | 1.25 | 22.1×3.5 (P22.4) | 22.4 | 28.4 | 1.25 | |
| 3.3×2.4 | 4 | 8 | 1.3 | 22.2×3 | 23 | 28 | 1.3 | |
| 4.8×1.9 (P5) | 5 | 8 | 1.25 | 23.7×3.5 (P24) | 24 | 30 | 1.25 | |
| 4.2×2.4 | 5 | 9 | 1.3 | 24.4×3.1 (G25) | 25 | 30 | 1.25 | |
| 5.8×1.9 (P6) | 6 | 9 | 1.25 | 24.2×3 | 25 | 30 | 1.3 | |
| 5.3×2.4 | 6 | 10 | 1.3 | 24.7×3.5 (P25) | 25 | 31 | 1.25 | |
| 6.8×1.9 (P7) | 7 | 10 | 1.25 | 25.2×3.5 (P25.5) | 25.5 | 31.5 | 1.25 | |
| 6.3×2.4 | 7 | 11 | 1.3 | 25.7×3.5 (P26) | 26 | 32 | 1.25 | |
| 7.8×1.9 (P8) | 8 | 11 | 1.25 | 26.2×3 | 27 | 32 | 1.3 | |
| 7.3×2.4 | 8 | 12 | 1.3 | 27.7×3.5 (P28) | 28 | 34 | 1.25 | |
| 8.8×1.9 (P9) | 9 | 12 | 1.25 | 28.7×3.5 (P29) | 29 | 35 | 1.25 | |
| 8.3×2.4 | 9 | 13 | 1.3 | 29.2×3.5 (P29.5) | 29.5 | 35.5 | 1.25 | |
| 9.8×1.9 (P10) | 10 | 13 | 1.25 | 29.4×3.1 (G30) | 30 | 35 | 1.25 | |
| 9.8×2.4 (P10A) | 10 | 14 | 1.25 | 29.2×3 | 30 | 35 | 1.3 | |
| 9.3×2.4 | 10 | 14 | 1.3 | 29.7×3.5 (P30) | 30 | 36 | 1.25 | |
| 10.8×2.4 (P11) | 11 | 15 | 1.25 | 30.2×3 | 31 | 36 | 1.3 | |
| 10.3×2.4 | 11 | 15 | 1.3 | 30.7×3.5 (P31) | 31 | 37 | 1.25 | |
| 11×2.4 (P11.2) | 11.2 | 15.2 | 1.25 | 31.2×3.5 (P31.5) | 31.5 | 37.5 | 1.25 | |
| 11.8×2.4 (P12) | 12 | 16 | 1.25 | 31.7×3.5 (P32) | 32 | 38 | 1.25 | |
| 11.2×2.4 | 12 | 16 | 1.3 | 66.6×5.7 (P67) | 67 | 77 | 1.9 | |
| 12.3×2.4 (P12.5) | 12.5 | 16.5 | 1.25 | 64.2×5.7 | 65 | 75 | 1.7 | |
| 12.3×2.4 | 13 | 17 | 1.3 | 69.4×3.1 (G70) | 70 | 75 | 1.25 | |
| 13.8×2.4 (P14) | 14 | 18 | 1.25 | 69.5×3 | 70 | 75 | 1.3 | |
| 13.3×2.4 | 14 | 18 | 1.3 | 72×3 | 72.5 | 77.5 | 1.3 | |
| 14.8×2.4 (P15) | 15 | 19 | 1.25 | 69.6×5.7 (P70) | 70 | 80 | 1.9 | |
| 14.3×2.4 | 15 | 19 | 1.3 | 70.6×5.7 (P71) | 71 | 81 | 1.9 | |
| 15.8×2.4 (P16) | 16 | 20 | 1.25 | 69.2×5.7 | 70 | 80 | 1.7 | |
| 15.3×2.4 | 16 | 20 | 1.3 | 74.5×3 | 75 | 80 | 1.3 | |
| 16.3×2.4 | 17 | 21 | 1.3 | 74.4×3.1 (G75) | 75 | 80 | 1.25 | |
| 17.8×2.4 (P18) | 18 | 22 | 1.25 | 72.5×5.7 | 72.5 | 82.5 | 1.7 | |
| 17.3×2.4 | 18 | 22 | 1.3 | 78.5×3 | 79 | 84 | 1.3 | |
| 18.8×2.4 (P19) | 19 | 23 | 1.25 | 74.6×5.7 (P75) | 75 | 85 | 1.9 | |
| 19.8×2.4 (P20) | 20 | 24 | 1.25 | 74.2×5.7 | 75 | 85 | 1.7 | |
| 19.2×3 | 20 | 25 | 1.3 | 79.4×3.1 (G80) | 80 | 85 | 1.25 | |
| 20.8×2.4 (P21) | 21 | 25 | 1.25 | 79.5×3 | 80 | 85 | 1.3 | |
| 21.8×2.4 (P22) | 22 | 26 | 1.25 | 79.2×5.7 | 80 | 90 | 1.7 | |
| 21.7×3.5 (P22A) | 22 | 28 | 1.25 | 79.6×5.7 (P80) | 80 | 90 | 1.9 | |
| O Ring size | Backup Ring Size | O Ring size | Backup Ring Size | |||||
| d1 | D1 | L1 | d1 | D1 | L1 | |||
| 84.4×3.1 (G85) | 85 | 90 | 1.25 | 39.2×5.7 | 40 | 50 | 1.7 | |
| 84.5×3 | 85 | 90 | 1.3 | 43.7×3.5 (P44) | 44 | 50 | 1.25 | |
| 87.5×3 | 88 | 93 | 1.3 | 44.4×3.1 (G45) | 45 | 50 | 1.25 | |
| 84.6×5.7 (P85) | 85 | 95 | 1.9 | 44.2×3 | 45 | 50 | 1.3 | |
| 84.2×5.7 | 85 | 95 | 1.7 | 44.7×3.5 (P45) | 45 | 51 | 1.25 | |
| 89.4×3.1 (G90) | 90 | 95 | 1.25 | 48×3 | 48.5 | 53.5 | 1.3 | |
| 89.5×3 | 90 | 95 | 1.3 | 45.7×3.5 (P46) | 46 | 52 | 1.25 | |
| 93.5×3 | 94 | 99 | 1.3 | 47.7×3.5 (P48) | 48 | 54 | 1.25 | |
| 89.6×5.7 (P90) | 90 | 100 | 1.9 | 47.6×5.7 (P48A) | 48 | 58 | 1.9 | |
| 89.1×5.7 | 90 | 100 | 1.7 | 44.2×5.7 | 45 | 55 | 1.7 | |
| 94.4×3.1 (G95) | 95 | 100 | 1.25 | 48.7×3.5 (P49) | 49 | 55 | 1.25 | |
| 94.5×3 | 95 | 100 | 1.3 | 49.4×3.1 (G50) | 50 | 55 | 1.25 | |
| 97.5×3 | 98 | 103 | 1.3 | 49.5×3 | 50 | 55 | 1.3 | |
| 94.6×5.7 (P95) | 95 | 105 | 1.9 | 49.7×3.5 (P50) | 50 | 56 | 1.25 | |
| 94.1×5.7 | 95 | 105 | 1.7 | 49.2×5.7 | 50 | 60 | 1.7 | |
| 99.4×3.1 (G100) | 100 | 105 | 1.25 | 49.6×5.7 (P50A) | 50 | 60 | 1.9 | |
| 99.5×3 | 100 | 105 | 1.3 | 51.6×5.7 (P52) | 52 | 62 | 1.9 | |
| 99.1×5.7 | 100 | 110 | 1.7 | 54.5×3 | 55 | 60 | 1.3 | |
| 99.6×5.7 (P100) | 100 | 110 | 1.9 | 52.6×5.7 (P53) | 53 | 63 | 1.9 | |
| 101.6×5.7 (P102) | 102 | 112 | 1.9 | 54.4×3.1 (G55) | 55 | 60 | 1.25 | |
| 104.4×3.1 (G105) | 105 | 110 | 1.25 | 52.2×5.7 | 53 | 63 | 1.7 | |
| 104.5×3 | 105 | 110 | 1.3 | 57.5×3 | 58 | 63 | 1.3 | |
| 104.1×5.7 | 105 | 115 | 1.7 | 54.6×5.7 (P55) | 55 | 65 | 1.9 | |
| 104.6×5.7 (P105) | 105 | 115 | 1.9 | 55.6×5.7 (P56) | 56 | 66 | 1.9 | |
| 109.4×3.1 (G110) | 110 | 115 | 1.25 | 54.2×5.7 | 55 | 65 | 1.7 | |
| 109.5×3 | 110 | 115 | 1.3 | 57.6×5.7 (P58) | 58 | 68 | 1.9 | |
| 112.5×3 | 113 | 118 | 1.3 | 59.4×3.1 (G60) | 60 | 65 | 1.25 | |
| 109.6×5.7 (P110) | 110 | 120 | 1.9 | 59.5×3 | 60 | 65 | 1.3 | |
| 111.6×5.7 (P112) | 112 | 122 | 1.9 | 62.5×3 | 63 | 68 | 1.3 | |
| 109.1×5.7 | 110 | 120 | 1.7 | 59.6×5.7 (P60) | 60 | 70 | 1.9 | |
| 114.4×3.1 (G115) | 115 | 120 | 1.25 | 61.6×5.7 (P62) | 62 | 72 | 1.9 | |
| 114.5×3 | 115 | 120 | 1.3 | 59.2×5.7 | 60 | 70 | 1.7 | |
| 114.3×5.7 | 115 | 125 | 1.7 | 62.6×5.7 (P63) | 63 | 73 | 1.9 | |
| 114.6×5.7 (P115) | 115 | 125 | 1.9 | 64.4×3.1 (G65) | 65 | 70 | 1.25 | |
| 119.4×3.1 (G120) | 120 | 125 | 1.25 | 64.5×3 | 65 | 70 | 1.3 | |
| 32.2×3 | 33 | 38 | 1.3 | 68.5×3 | 69 | 74 | 1.3 | |
| 33.7×3.5 (P34) | 34 | 40 | 1.25 | 64.6×5.7 (P65) | 65 | 75 | 1.9 | |
| 34.4×3.1 (G35) | 35 | 40 | 1.25 | 189.3×5.7 (G190) | 190 | 200 | 1.9 | |
| 34.2×3 | 35 | 40 | 1.3 | 189.5×8.4 (P190) | 190 | 205 | 2.75 | |
| 34.7×3.5 (P35) | 35 | 41 | 1.25 | 194.3×5.7 | 195 | 205 | 1.7 | |
| 35.2×3.5 (P35.5) | 35.5 | 41.5 | 1.25 | 194.3×5.7 (G195) | 195 | 205 | 1.9 | |
| 35.7×3.5 (P36) | 36 | 42 | 1.25 | 194.5×8.4 (P195) | 195 | 210 | 2.75 | |
| 36.2×3 | 37 | 42 | 1.3 | 199.3×5.7 | 200 | 210 | 1.7 | |
| 37.7×3.5 (P38) | 38 | 44 | 1.25 | 199.3×5.7 (G200) | 200 | 210 | 1.9 | |
| 38.7×3.5 (P39) | 39 | 45 | 1.25 | 199.5×8.4 (P200) | 200 | 215 | 2.75 | |
| 39.4×3.1 (G40) | 40 | 45 | 1.25 | 204.5×8.4 (P205) | 205 | 220 | 2.75 | |
| 39.2×3 | 40 | 45 | 1.3 | 209.5×8.4 (P209) | 209 | 224 | 2.75 | |
| 39.7×3.5 (P40) | 40 | 46 | 1.25 | 209.3×5.7 | 210 | 220 | 1.7 | |
| 42.2×3 | 43 | 48 | 1.3 | 209.3×5.7 (G210) | 210 | 220 | 1.9 | |
| 40.7×3.5 (P41) | 41 | 47 | 1.25 | 209.5×8.4 (P210) | 210 | 225 | 2.75 | |
| 41.7×3.5 (P42) | 42 | 48 | 1.25 | 214.5×8.4 (P215) | 215 | 230 | 2.75 | |
| O Ring size | Backup Ring Size | O Ring size | Backup Ring Size | |||||
| d1 | D1 | L1 | d1 | D1 | L1 | |||
| 219.3×5.7 | 220 | 230 | 1.7 | 129.4×3.1 (G130) | 130 | 135 | 1.25 | |
| 219.3×5.7 (G220) | 220 | 230 | 1.9 | 129.5×3 | 130 | 135 | 1.3 | |
| 219.5×8.4 (P220) | 220 | 235 | 2.75 | 129.3×5.7 | 130 | 140 | 1.7 | |
| 224.5×8.4 (P225) | 225 | 240 | 2.75 | 129.6×5.7 (P130) | 130 | 140 | 1.9 | |
| 229.2×5.7 | 230 | 240 | 1.7 | 131.6×5.7 (P132) | 132 | 142 | 1.9 | |
| 229.3×5.7 (G230) | 230 | 240 | 1.9 | 134.4×3.1 (G135) | 135 | 140 | 1.25 | |
| 229.5×8.4 (P230) | 230 | 245 | 2.75 | 134.5×3 | 135 | 140 | 1.3 | |
| 234.5×8.4 (P235) | 235 | 250 | 2.75 | 134.3×5.7 | 135 | 145 | 1.7 | |
| 239.3×5.7 | 240 | 250 | 1.7 | 134.6×5.7 (P135) | 135 | 145 | 1.9 | |
| 239.3×5.7 (G240) | 240 | 250 | 1.9 | 139.4×3.1 (G140) | 140 | 145 | 1.25 | |
| 239.5×8.4 (P240) | 240 | 255 | 2.75 | 139.5×3 | 140 | 145 | 1.3 | |
| 244.5×8.4 (P245) | 245 | 260 | 2.75 | 139.5×5.7 | 140 | 150 | 1.7 | |
| 249.3×5.7 | 250 | 260 | 1.7 | 139.6×5.7 (P140) | 140 | 150 | 1.9 | |
| 249.3×5.7 (G250) | 250 | 260 | 1.9 | 144.4×3.1 (G145) | 145 | 150 | 1.25 | |
| 249.5×8.4 (P250) | 250 | 265 | 2.75 | 144.5×3 | 145 | 150 | 1.3 | |
| 254.5×8.4 (P255) | 255 | 270 | 2.75 | 144.3×5.7 | 145 | 155 | 1.7 | |
| 259.3×5.7 (G260) | 260 | 270 | 1.9 | 144.6×5.7 (P145) | 145 | 155 | 1.9 | |
| 259.5×8.4 (P260) | 260 | 275 | 2.75 | 149.3×5.7 | 150 | 160 | 1.7 | |
| 264.5×8.4 (P265) | 265 | 280 | 2.75 | 149.3×5.7 (G150) | 150 | 160 | 1.9 | |
| 269.3×5.7 | 270 | 280 | 1.7 | 149.6×5.7 (P150) | 150 | 160 | 1.9 | |
| 269.3×5.7 (G270) | 270 | 280 | 1.9 | 149.5×8.4 (P150A) | 150 | 165 | 2.75 | |
| 269.5×8.4 (P270) | 270 | 285 | 2.75 | 154.3×5.7 | 155 | 165 | 1.7 | |
| 274.5×8.4 (P275) | 275 | 290 | 2.75 | 154.3×5.7 (G155) | 155 | 165 | 1.9 | |
| 279.3×5.7 (G280) | 280 | 290 | 1.9 | 154.5×8.4 (P155) | 155 | 170 | 2.75 | |
| 279.5×8.4 (P280) | 280 | 295 | 2.75 | 159.3×5.7 | 160 | 170 | 1.7 | |
| 284.5×8.4 (P285) | 285 | 300 | 2.75 | 159.3×5.7 (G160) | 160 | 170 | 1.9 | |
| 289.3×5.7 (G290) | 290 | 300 | 1.9 | 159.5×8.4 (P160) | 160 | 175 | 2.75 | |
| 289.5×8.4 (P290) | 290 | 305 | 2.75 | 164.3×5.7 | 165 | 175 | 1.7 | |
| 294.5×8.4 (P295) | 295 | 310 | 2.75 | 164.3×5.7 (G165) | 165 | 175 | 1.9 | |
| 299.3×5.7 (G300) | 300 | 310 | 1.9 | 164.5×8.4 (P165) | 165 | 180 | 2.75 | |
| 299.5×8.4 (P300) | 300 | 315 | 2.75 | 169.3×5.7 | 170 | 180 | 1.7 | |
| 314.5×8.4 (P315) | 315 | 330 | 2.75 | 169.3×5.7 (G170) | 170 | 180 | 1.9 | |
| 319.5×8.4 (P320) | 320 | 335 | 2.75 | 169.5×8.4 (P170) | 170 | 185 | 2.75 | |
| 334.5×8.4 (P335) | 335 | 350 | 2.75 | 174.3×5.7 | 175 | 185 | 1.7 | |
| 339.5×8.4 (P340) | 340 | 355 | 2.75 | 174.3×5.7 (G175) | 175 | 185 | 1.9 | |
| 119.5×3 | 120 | 125 | 1.3 | 174.5×8.4 (P175) | 175 | 190 | 2.75 | |
| 119.3×5.7 | 120 | 130 | 1.7 | 179.3×5.7 | 180 | 190 | 1.7 | |
| 119.6×5.7 (P120) | 120 | 130 | 1.9 | 179.3×5.7 (G180) | 180 | 190 | 1.9 | |
| 124.4×3.1 (G125) | 125 | 130 | 1.25 | 179.5×8.4 (P180) | 180 | 195 | 2.75 | |
| 124.5×3 | 125 | 130 | 1.3 | 184.3×5.7 | 185 | 195 | 1.7 | |
| 124.3×5.7 | 125 | 135 | 1.7 | 184.3×5.7 (G185) | 185 | 195 | 1.9 | |
| 124.6×5.7 (P125) | 125 | 135 | 1.9 | 184.5×8.4 (P185) | 185 | 200 | 2.75 | |
