Rod Back-up Ring Gasket Seal
Backup Ring overview
DJF Seal Factory direct wholesale piston rod gasket back-up rings (materials: Nylon / Copper Powder-filled PTFE etc) for hydraulic cylinders used in construction machinery and industrial equipment. We offer a complete range of sizes for this type of back-up ring seals and support customization of both materials and dimensions.
Key parameters
| Parameter | Value |
|---|---|
| Material | Nylon/PTFE + Copper Powder |
| Performance | Nylon gaskets: Temperature range -20°C to +100°C; suitable for pressures ≤25 MPa; high compressive strength, capable of withstanding 20–30 MPa. PTFE gaskets: Temperature range -180°C to +250°C; resistant to oil, hydraulic fluid, acids, alkalis, and aging; does not swell or become brittle. |
| Application | Hydraulic cylinder. |
| Function | Used in conjunction with the cylinder head and piston rod’s main oil seal to enhance the main seal’s pressure resistance and prevent extrusion. |
Available sizes
199 size(s) recorded for this profile. Dimensions in millimetres unless noted otherwise.
| Inner Diameter (d) mm | Outer Diameter (D) mm | Height (T) mm |
|---|---|---|
| 25 | 40 | 3 |
| 30 | 40 | 3 |
| 30 | 45 | 3 |
| 34 | 40 | 3 |
| 35 | 45 | 3 |
| 35 | 50 | 3 |
| 40 | 50 | 3 |
| 40 | 55 | 3 |
| 40 | 60 | 3 |
| 45 | 55 | 3 |
| 45 | 60 | 3 |
| 45 | 65 | 3 |
| 50 | 60 | 3 |
| 50 | 63 | 3 |
| 50 | 65 | 3 |
| 50 | 70 | 3 |
| 55 | 65 | 3 |
| 55 | 68 | 3 |
| 55 | 70 | 3 |
| 55 | 71 | 3 |
| 55 | 75 | 3 |
| 60 | 70 | 3 |
| 60 | 73 | 3 |
| 60 | 75 | 3 |
| 60 | 76 | 3 |
| 60 | 80 | 3 |
| 64 | 80 | 3 |
| 65 | 75 | 3 |
| 65 | 78 | 3 |
| 65 | 80 | 3 |
| 65 | 85 | 3 |
| 70 | 63 | 3 |
| 70 | 80 | 3 |
| 70 | 83 | 3 |
| 70 | 85 | 3 |
| 70 | 90 | 3 |
| 75 | 85 | 3 |
| 75 | 88 | 3 |
| 75 | 90 | 3 |
| 75 | 95 | 3 |
| 80 | 90 | 3 |
| 80 | 93 | 3 |
| 80 | 95 | 3 |
| 80 | 100 | 3 |
| 85 | 100 | 3 |
| 85 | 105 | 3 |
| 90 | 105 | 3 |
| 90 | 110 | 3 |
| 90 | 115 | 3 |
| 95 | 103 | 3 |
| 95 | 110 | 3 |
| 95 | 115 | 3 |
| 100 | 115 | 3 |
| 100 | 120 | 3 |
| 105 | 120 | 3 |
| 105 | 125 | 3 |
| 110 | 125 | 3 |
| 110 | 130 | 3 |
| 115 | 130 | 3 |
| 115 | 135 | 3 |
| 120 | 135 | 3 |
| 120 | 140 | 3 |
| 125 | 140 | 3 |
| 125 | 145 | 3 |
| 125 | 150 | 3 |
| 130 | 145 | 3 |
| 130 | 150 | 3 |
| 135 | 150 | 3 |
| 135 | 155 | 3 |
| 140 | 155 | 3 |
| 140 | 160 | 3 |
| 145 | 160 | 3 |
| 145 | 165 | 3 |
| 150 | 165 | 3 |
| 150 | 170 | 3 |
| 160 | 175 | 3 |
| 160 | 180 | 3 |
| 160 | 185 | 3 |
| 170 | 190 | 3 |
| 170 | 195 | 3 |
| 180 | 200 | 3 |
| 80 | 95 | 4 |
| 90 | 105 | 4 |
| 85 | 100 | 4 |
| 95 | 110 | 4 |
| 100 | 115 | 4 |
| 110 | 125 | 4 |
| 115 | 130 | 4 |
| 115 | 135 | 4 |
| 130 | 145 | 4 |
| 130 | 150 | 4 |
| 140 | 160 | 4 |
| 150 | 170 | 4 |
| 160 | 180 | 4 |
| 170 | 190 | 4 |
| 170 | 195 | 4 |
| 200 | 225 | 4 |
| 200 | 225 | 5 |
| 25 | 33 | 1.25 |
| 35 | 43 | 2 |
| 40 | 48 | 2 |
| 45 | 53 | 2 |
| 50 | 58 | 2 |
| 115 | 135 | 2 |
| 130 | 145 | 2 |
| 140 | 160 | 2 |
| 32 | 48 | 3 |
| 40 | 48 | 3 |
| 50 | 60 | 3 |
| 50 | 63 | 3 |
| 50 | 65 | 3 |
| 50 | 70 | 3 |
| 55 | 65 | 3 |
| 55 | 68 | 3 |
| 55 | 70 | 3 |
| 55 | 71 | 3 |
| 60 | 70 | 3 |
| 60 | 73 | 3 |
| 60 | 75 | 3 |
| 60 | 80 | 3 |
| 65 | 75 | 3 |
| 65 | 78 | 3 |
| 65 | 80 | 3 |
| 65 | 85 | 3 |
| 70 | 80 | 3 |
| 70 | 83 | 3 |
| 70 | 85 | 3 |
| 70 | 90 | 3 |
| 75 | 85 | 3 |
| 75 | 88 | 3 |
| 75 | 90 | 3 |
| 75 | 95 | 3 |
| 80 | 100 | 3 |
| 80 | 90 | 3 |
| 80 | 93 | 3 |
| 80 | 95 | 3 |
| 85 | 100 | 3 |
| 85 | 105 | 3 |
| 90 | 105 | 3 |
| 90 | 110 | 3 |
| 95 | 110 | 3 |
| 95 | 115 | 3 |
| 95 | 110 | 3 |
| 100 | 115 | 3 |
| 100 | 120 | 3 |
| 105 | 120 | 3 |
| 105 | 125 | 3 |
| 110 | 125 | 3 |
| 110 | 130 | 3 |
| 115 | 130 | 3 |
| 115 | 135 | 3 |
| 120 | 135 | 3 |
| 120 | 140 | 3 |
| 130 | 145 | 3 |
| 130 | 150 | 3 |
| 135 | 150 | 3 |
| 140 | 155 | 3 |
| 140 | 160 | 3 |
| 145 | 160 | 3 |
| 150 | 165 | 3 |
| 150 | 170 | 3 |
| 160 | 175 | 3 |
| 50 | 60 | 3.5 |
| 50 | 63 | 3.5 |
| 50 | 65 | 3.5 |
| 55 | 65 | 3.5 |
| 55 | 68 | 3.5 |
| 55 | 70 | 3.5 |
| 55 | 71 | 3.5 |
| 60 | 70 | 3.5 |
| 60 | 73 | 3.5 |
| 60 | 75 | 3.5 |
| 60 | 76 | 3.5 |
| 65 | 78 | 3.5 |
| 65 | 80 | 3.5 |
| 65 | 85 | 3.5 |
| 70 | 80 | 3.5 |
| 70 | 83 | 3.5 |
| 70 | 85 | 3.5 |
| 75 | 85 | 3.5 |
| 75 | 88 | 3.5 |
| 75 | 90 | 3.5 |
| 80 | 100 | 3.5 |
| 80 | 90 | 3.5 |
| 80 | 93 | 3.5 |
| 80 | 95 | 3.5 |
| 85 | 100 | 3.5 |
| 90 | 105 | 3.5 |
| 90 | 110 | 3.5 |
| 95 | 110 | 3.5 |
| 95 | 115 | 3.5 |
| 100 | 115 | 3.5 |
| 105 | 120 | 3.5 |
| 110 | 125 | 3.5 |
| 110 | 130 | 3.5 |
| 115 | 130 | 3.5 |
| 120 | 140 | 3.5 |
| 110 | 125 | 4 |
| 115 | 130 | 4 |
Applications
- Hydraulic cylinders on excavators, loaders, cranes and other mobile machinery
- Industrial cylinders, presses and hydraulic power units
- Replacement seal programmes for maintenance and repair workshops
Request a quote
Send your part number, size list or drawing with quantity to DJF Seal for a quotation. We supply B2B, wholesale and OEM volumes with export packing.
FAQ
What is the Rod Back-up Rings used for?
It is used in back-up rings applications. Confirm the exact groove and mating dimensions against your drawing before ordering.
Can DJF supply custom sizes?
Yes. DJF Seal is a hydraulic seal manufacturer (not a distributor) and can quote custom and non-standard sizes against your drawing or sample.
What is the minimum order quantity?
MOQ depends on profile and size. Send your part list and quantity; we reply with price, lead time and packing details.
Do you supply wholesale / OEM volumes?
Yes. DJF supports wholesalers, repair workshops and OEM programmes with bulk pricing, neutral or private-label packaging.
