Skeleton oil seals, also known as lip seals, are crucial components in various mechanical applications. They play a vital role in preventing the leakage of lubricants and the ingress of contaminants, ensuring the smooth operation of machinery. As a supplier of skeleton oil seals, one question that frequently arises from customers is: How long can a skeleton oil seal be stored? In this blog, I’ll delve into this topic, exploring the factors that influence the storage life of skeleton oil seals and providing some practical guidelines for proper storage. Skeleton Oil Seal
Factors Affecting the Storage Life of Skeleton Oil Seals
1. Material Composition
The material of the skeleton oil seal is a primary factor determining its storage life. Common materials for oil seals include nitrile rubber (NBR), fluorocarbon rubber (FKM), silicone rubber (VMQ), and ethylene propylene diene monomer (EPDM). Each material has its own chemical properties and resistance to environmental factors.
- Nitrile Rubber (NBR): NBR is widely used due to its good resistance to oil, fuel, and water. However, it is sensitive to ozone and high – temperature aging. Under normal storage conditions (room temperature and low – humidity environment), NBR oil seals can typically be stored for about 2 – 3 years.
- Fluorocarbon Rubber (FKM): FKM offers excellent chemical resistance, high – temperature stability, and resistance to ozone. It can withstand harsh environments better than NBR. FKM skeleton oil seals can have a storage life of up to 5 years or more under proper storage conditions.
- Silicone Rubber (VMQ): VMQ has good flexibility and high – temperature performance. But it is relatively weak in terms of oil resistance. Silicone oil seals can usually be stored for 3 – 4 years, depending on the storage environment.
- Ethylene Propylene Diene Monomer (EPDM): EPDM has excellent resistance to weathering, ozone, and water. It can be stored for about 2 – 3 years under normal conditions.
2. Storage Environment
The storage environment has a significant impact on the lifespan of skeleton oil seals.
- Temperature: High temperatures can accelerate the aging process of rubber materials. When the temperature is too high, the rubber may become brittle, lose its elasticity, and crack. On the other hand, extremely low temperatures can also cause the rubber to harden. The ideal storage temperature for skeleton oil seals is between 5°C and 25°C.
- Humidity: High humidity can lead to corrosion of the metal skeleton in the oil seal and promote the growth of mold on the rubber surface. The relative humidity in the storage area should be maintained between 40% and 60%.
- Light and Ozone: Exposure to direct sunlight and ozone can cause the rubber to deteriorate. Ozone, in particular, can cause cracking on the surface of the rubber. The storage area should be away from direct sunlight and sources of ozone, such as electric motors and high – voltage equipment.
3. Packaging
Proper packaging can significantly extend the storage life of skeleton oil seals. Seals should be stored in their original packaging or in sealed plastic bags to prevent the ingress of dust, moisture, and ozone. The packaging should also be labeled with information such as the type of seal, material, and production date for easy identification.
Practical Storage Guidelines
1. Storage Location
Choose a clean, dry, and well – ventilated storage area. The storage room should be away from heat sources, direct sunlight, and chemicals. It’s best to store the oil seals on shelves or in cabinets to keep them off the floor and protected from potential damage.
2. Handling
When handling skeleton oil seals, avoid touching the sealing lip with bare hands. The oils and salts on the skin can react with the rubber and cause damage. Use clean gloves or tools when handling the seals.
3. Rotation
Implement a first – in – first – out (FIFO) inventory management system. This ensures that the oldest seals are used first, reducing the risk of using expired or deteriorated seals.
4. Inspection
Regularly inspect the stored oil seals for signs of damage, such as cracks, deformation, or discoloration. If any defects are found, the seals should be removed from storage and not used.
Determining the Usability of Stored Skeleton Oil Seals
Even if a skeleton oil seal has exceeded its estimated storage life, it doesn’t necessarily mean it is no longer usable. The following methods can be used to determine the usability of stored seals:
1. Visual Inspection
Check the appearance of the seal. Look for any obvious signs of damage, such as cracks, cuts, or swelling. The sealing lip should be smooth and free of deformities.
2. Elasticity Test
Gently squeeze the seal to check its elasticity. A good – quality seal should quickly return to its original shape after being squeezed. If the seal remains deformed or feels hard, it may have deteriorated.
3. Compatibility Test
If possible, perform a compatibility test with the lubricant and the operating environment. This can help ensure that the seal will perform its function effectively.
Conclusion
The storage life of a skeleton oil seal depends on multiple factors, including material composition, storage environment, and packaging. By understanding these factors and following the proper storage guidelines, we can extend the storage life of the seals and ensure their quality when they are put into use.
Silicone Rubber Products As a supplier of skeleton oil seals, we are committed to providing high – quality products and professional advice on storage and usage. If you have any questions about our skeleton oil seals, such as product selection, storage requirements, or application scenarios, please feel free to contact us for further discussion. We look forward to establishing a long – term cooperative relationship with you and meeting your specific needs.
References
- Rubber Manufacturers Association (RMA). Rubber Product Storage Guidelines.
- ASTM International. Standards related to rubber materials and their properties.
Jinhua Haobo Sealing Technology Co., Ltd.
As one of the most professional skeleton oil seal manufacturers and suppliers in China, we’re featured by quality products and good price. Please rest assured to buy customized skeleton oil seal made in China here from our factory. For pricelist, contact us now.
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