Linde Polymer Tec Co.,Ltd. is one of the most experienced manufacturers and suppliers of fkm oil stop valve seal ring cnc seal ring in China, also supports customized service. Please feel free to buy high quality fkm oil stop valve seal ring cnc seal ring for sale here from our factory.
FKM oil stop valve seal CNC sealing ring
Products Material advantages
1. Chemical stability
FKM (fluororubber) material has excellent chemical stability. In the oil industry, stop valves are exposed to various complex chemicals, such as sulfides and organic acids in crude oil. FKM sealing rings can resist the erosion of these chemicals. Even in an environment with high concentrations of hydrogen sulfide (such as 500-1000ppm), no obvious chemical changes will occur, effectively preventing seal failure caused by chemical corrosion.
2. High temperature resistance
Its high temperature resistance is significant and can work normally in a wide temperature range. In the high temperature links of the oil refining process, such as catalytic cracking units, the medium temperature can be as high as about 200℃. FKM sealing rings can still maintain good elasticity and sealing performance in such a high temperature environment. Its high glass transition temperature makes it not easily softened at high temperatures, ensuring the reliable sealing of the stop valve under high temperature conditions.
3. Oil resistance
Excellent tolerance to petroleum and its products. Since the oil stop valve is mainly used to control the flow of oil, the sealing ring needs to be immersed in the oil medium for a long time. FKM material will not swell after contacting oil like some ordinary rubber, which ensures its dimensional stability and maintains a good sealing effect.
Products cNC processing characteristics
1. High-precision processing
For example, the inner diameter tolerance can reach ±0.03mm, and the outer diameter tolerance can reach ±0.05mm;
2. Complex shape manufacturing
Capable of manufacturing sealing rings of complex shapes. The shape requirements of the sealing ring of the oil stop valve vary depending on the specific application, which may be O-shaped, V-shaped or other special shapes. CNC processing can flexibly adjust the tool path according to the design requirements to manufacture sealing rings of various shapes to meet the sealing requirements of different types of stop valves.
3. Surface quality optimization
CNC processing can achieve good surface finish. The surface roughness of the sealing ring can reach a high standard of Ra0.8 - Ra1.6μm. The smooth surface reduces the friction between the valve seat and the valve stem, reduces the risk of wear, and extends the service life of the sealing ring, while also helping to improve the sealing effect.
| Parameters | Reference value range |
| Shore hardness | 85±3 (Shore A) |
| Tensile strength | ≥10 - 15MPa (depending on the formulation and process) |
| Tear elongation | ≥150% - 250% |
| Compression set (70℃×22h) | ≤20% - 30% |
| Temperature range | -20℃ - 200℃ (long-term use), up to 250℃ for a short time |
| Oil resistance (volume change rate, after immersion in specific oil) | ≤5% - 10% |
| Density | About 1.8 - 2.0g/cm³ |
Application Description
Application in oil stop valves
1. Efficient sealing performance
With the excellent characteristics of FKM materials and the high precision of CNC machining, the sealing ring provides efficient sealing performance in the oil stop valve. Whether in high-pressure (such as 10-30MPa) or low-pressure oil pipeline systems, it can effectively prevent oil leakage. In the complex pipeline system of offshore oil platforms, its reliable sealing performance ensures the safe progress of oil extraction and transportation.
2. Compatibility and reliability
It has good compatibility with metal parts in oil stop valves (such as stainless steel or carbon steel valve seats and valve stems). The sealing performance will not be affected by chemical reactions between materials, ensuring the overall reliability and stability of the stop valve. In the long-term operation process, the frequency of repairs and replacements caused by sealing problems is reduced, and the maintenance cost is reduced.
More customized for oil valve rubber sealings solutions,please send drawing or samples to us.
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