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O-rings are very susceptible to various external environmental conditions. If the storage life of the O-rings is longer, it is necessary to understand the storage conditions of the O-rings to extend the storage time of the O-rings.
The shelf life of seals is determined by the type of rubber material and storage conditions. Under good storage conditions, the shelf life of each material O-ring is as follows:
1 fluorine rubber , silicone rubber , fluorine silicone rubber for 10 years
2 nitrile rubber , hydrogenated nitrile rubber , neoprene for 6 years
3 EPDM rubber for 8 years
4 Polyurethane, thermoplastic material 4 years
5 Teflon indefinitely
6 Perfluoro rubber for 20 years
After the above period, it should be inspected before use. After inspection, it may be used for a period of time. Even if stored under the above-mentioned good conditions, rubber with a thickness of less than 1.5 mm is easily oxidized and fails. Therefore, for this type of product, even within the above-mentioned years, it must be frequently checked and tested.
O-rings are affected by various external environmental factors, such as distortion, oxygen, ozone, light, heat sources, humidity, oil, or chemical solvents. O-rings may fail due to changes in their physical and chemical properties. . Therefore, basic regulations have been made on the storage, cleaning, and maintenance of rubber seals.
1: Lighting: Avoid sunlight and strong artificial light sources containing ultraviolet light. UV-resistant bags provide the best protection. Red or orange paint or film is recommended for warehouse windows.
2: Humidity: The relative humidity of the warehouse should be less than 70%, to avoid being too humid or too dry, and condensation should not occur.
3: Temperature: 5-25 ℃ is the ideal storage temperature. Avoid contact with heat and sunlight. Seals removed from low-temperature storage should be placed in an environment of 20 ° C before use.
4: Radiation: Avoid damage to the seal by ionizing radiation.
5: Oxygen and ozone: Rubber materials should be protected from exposure to circulating air. This can be achieved by packaging, wrapping, storing in an airtight container or other suitable methods. Ozone is harmful to most elastomers. Avoid the following equipment in the warehouse: high-voltage electrical equipment, motors and other equipment.
6: Deformation: The rubber parts should be placed as freely as possible to avoid being stretched, compressed or otherwise deformed.
7: Contact with liquid or semi-solid materials: Do not contact solvents, oils, greases or other semi-solid materials.
8: Contact with metal or non-metallic materials: Do not allow contact with magnetic materials, cast iron, copper and its alloys, or materials containing rubber that can damage rubber. Do not use PVC material for packing seals. Do not mix seals of different materials.
9: Cleaning: As needed, the seals can be cleaned with soap and water. However, water cannot contact fiber-reinforced seals, rubber-metal bonded seals, and AU material seals. Disinfectants, organic solvents, and sharp-edged tools must not be used. The cleaned seals should be air-dried at room temperature and not accessible to heat sources.
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