Linde Polymer Tec Co.,Ltd. is one of the most experienced manufacturers and suppliers of din 3869 profile rings in China, also supports customized service. Please feel free to buy high quality din 3869 profile rings for sale here from our factory.
Products Description
DIN 3869 profile rings are axial static soft seals that comply with German industrial standards (DIN 3869) and are mainly used to seal threaded pipe connections, pipe fittings, and static interfaces in hydraulic systems.
Design and Advantages
- Axial static seal: Designed for threaded components (such as pipe fittings, valves, and nuts), the seal is achieved through the compression of the elastomer to prevent medium leakage and pressure loss.
- Special cross-sectional shape: Unlike ordinary O-rings, the trapezoidal or special-shaped cross-section of DIN 3869 profile rings hardly deforms under high pressure, which can compensate for manufacturing tolerances and avoid distortion or extrusion gaps during installation.
- Pressure resistance: Suitable for high-pressure environments (such as 600 bar), commonly used in high-pressure equipment such as hydraulic presses and injection molding machines.
- High sealing: Effectively prevent leakage even in low-viscosity media.
- Durability: Resistant to compression deformation and wear, long service life.
Material and Specification
| Compound | Material | Durometer | Color | Temp Range |
| N85 | NBR (Buna-N, Nitrile) | 85 Shore A | Black | 25 to 100 ºC (-22 to 212 ºF) |
| F80 | Viton (FKM) | 80 Shore A | Green | -20 to 200 ºC (-4 to 392 ºF) |
| E80 | EPDM | 80 Shore A | Purple | -45 to 150 ºC (-49 to 302 ºF) |
Material Technical Data Sheet
| NBR 85 | Property | Test Method | Unit | Typical Value |
| Color | Black | |||
| Density | ISO 1183-1 | g/cm3 | 1.31 | |
| Hardness @ 23°C | ISO 7619-1 | Shore A | 85 (+/-5) | |
| Tensile Strength | DIN 53504 | N/mm2 | 15.6 | |
| 100% Modulus | DIN 53504 | N/mm2 | 12.7 | |
| Elongation at break | DIN 53504 | % | 169 | |
| Tear Strength | ISO 34-1B | N/mm | 19.9 | |
| Compression set (24 Hours @ 70°C, 25% ) | ISO 815-1 | % | 6.2 | |
| Compression set (24 Hours @ 100°C, 25%) | ISO 815-1 | % | 12.5 | |
| Minimum service temperature | °C | -25 | ||
| Maximum service temperature | °C | +100 |
DIN 3869 Profile Ring Size Chart
| Nominal Size (mm) | Thread (metric) | Thread (inch) | ID | OD | T +/- 0.1 | T1 +/- 0.2 |
| 8 | M8 x 1.0 | 6.5 | 9.9 | 1 | 0.5 | |
| 10 | M10 x 1 | G 1/8 A | 8.4 | 11.9 | 1 | 0.5 |
| 12 | M12 x 1.5 | - | 9.8 | 14.4 | 1.5 | 0.8 |
| 14 | M14 1.5 | G 1/4 A | 11.6 | 16.5 | 1.5 | 0.8 |
| 16 | M16 x 1.5 | - | 13.8 | 18.9 | 1.5 | 0.8 |
| 17 | - | G 3/8 A | 14.7 | 18.9 | 1.5 | 0.8 |
| 18 | M18 x 1.5 | - | 15.7 | 20.9 | 1.5 | 0.8 |
| 20 | M20 x 1.5 | - | 17.8 | 22.9 | 1.5 | 0.8 |
| 21 | - | G 1/2 A | 18.5 | 23.9 | 1.5 | 0.8 |
| 22 | M22 x 1.5 | - | 19.6 | 24.3 | 1.5 | 0.8 |
| 24 | M24 x 1.5 | 21.8 | 26.9 | 1.5 | 0.8 | |
| 27 | M26 x 1.5 / M27 x 2.0 | G 3/4 A | 23.9 | 29.3 | 1.5 | 0.8 |
| 30 | M30 x 1.5 | 27.7 | 32.7 | 2 | 0.8 | |
| 33 | M33 x 2.0 | G 1 A | 29.7 | 35.7 | 2 | 1 |
| 38 | M38 x 1.5 | 35.9 | 43.2 | 2.4 | 1 | |
| 42 | M42 x 2.0 | G 1 1/4 A | 38.8 | 45.8 | 2 | 1 |
| 48 | M48 x 2.0 | G 1 1/2 A | 44.7 | 50.7 | 2 | 1 |
| 60 | M60 x 2.0 | G 2 A | 56.5 | 66.1 | 4 | 2 |
Typical Applications
Hydraulic and Pneumatic Systems
1. Engineering machinery: Hydraulic cylinder joint seals for excavators and cranes.
2. Injection molding machines: Prevent hydraulic oil leakage in high-pressure oil circuit systems.
3. Machine tools: Seals for hydraulic fixtures and guide rails to ensure stable pressure.
Fuel and Chemical Systems
1. Automobile fuel system: threaded seals of diesel or gasoline pipelines (such as fuel pump joints).
2. Petrochemical equipment: static seals of pipeline flanges and reactors, resistant to acid and alkali media.
3. Marine systems: seals of fuel delivery pipes and cooling pipes.
Vacuum and Clean Environment
1. Vacuum chamber: seal of a high vacuum pump or coating equipment.
2. Semiconductor equipment: seal of gas delivery pipeline in a clean room.
General Industrial Equipment
1. Compressed air system: seal of gas tank or pipeline.
2. Cooling system: coolant pipe joint (such as engine cooling pipeline).
Advantages of Linde Polymer
Selected raw materials, safe and environmentally friendly
1. The rubber materials are from renowned brands such as DuPont, Dow Corning, and JSR.
2. All products are produced by national standards, AS568, JIS, and other standards, and the materials have passed third-party professional certifications such as ROHS, REACH, and FDA.
3. The products are fine, the molds are high-precision, and there are no burrs or bumps.
Advanced equipment and mature technology
1. Adopt a precise production vulcanizing unit and a high-precision CNC machining center.
2. The company has a complete set of production processes to ensure the sealing and stable quality of the products.
Precision testing, quality control
1. Precision testing instruments ensure the qualified rate of products and check every level to prevent defective products from being delivered to customers.
2. Strict control of the production process to achieve pre-prevention, process control, and traceability afterward.
Value-added services, worry-free after-sales
1. Have a complete supply chain management, implement an effective cargo delivery plan, and ensure on-time delivery.
2. Provide value-added services such as early product participation, product design, material development, and secondary processing, such as grinding or spraying, special packaging, and assembly.
3. Provide customers with rapid rubber parts prototype trial production (rapid test).
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