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Service life and storage of seals

by:ORK      2022-10-25
The service life of a seal cannot be specified in terms of years or hours. It is related to factors such as the conditions of use, the material of the seal, the quality of the seal, the installation groove, the installation method and the storage of the seal. 1. Service life of seals (1) Conditions of use. 1) Select the appropriate seal material, and the adaptability of the material to the working temperature and the compatibility of the oil. 2) The material of the seal relative to the moving parts and the machining accuracy of the surface have an impact on the seal. The surface roughness value of the relative moving surface is small, which has a good effect on prolonging the service life. 3) The lubrication state should be good. 4) To prevent dust and sand from mixing. 5) The lubricating oil should be clean. (2) Seal life The service life of the seal depends on its working conditions and environmental conditions. at any stage of the seal's use. The working conditions, both in motion and at rest, must be suitable for the selected conditions. For example, the seals made of polyurethane rubber seals are afraid that the oil contains water. If it encounters water, it will deteriorate and be inelastic. Another example is the seal made of nitrile oil-resistant rubber. When the oil temperature exceeds the allowable range, the oil temperature rises by 15 °C, and its life is reduced by 50%. 1) Seals used in short-stroke mechanisms or hydraulic components can be calculated according to the number of actions, generally 150,000 to 250,000 times. 2) Seals used in long-stroke hydraulic cylinders can be calculated according to the mileage, generally 100-1500km. 3) Seals used for static sealing can be calculated according to the actual use time, generally 15 to 20,000 hours or 1.5 to 2 years. 2. Storage of seals Seals are a kind of wearing parts, and spare parts are usually required. (1) Control the storage period and rubber seals seals are prone to natural aging. The actual service life of the rubber seal should be equal to the sum of the storage period and the working period. To extend the working period, the storage period between the manufacture and use of the product must be shortened. , only in this way can the seal perform its maximum effect. (2) The following points are required for storage. 1) Seals should avoid being placed in places with high room temperature, direct sunlight, humidity and air convection. 2) Seals are not allowed to be stacked or hung to avoid permanent deformation. 3) The year and month of manufacture of the seal should be recorded on the packaging bag, and issued for use within the storage period. 4) Put the seal in a polyethylene bag, and keep it in a cool and dark place after sealing. 5) The storage period is one year, and the seals that exceed the storage period shall be inspected and processed, and those that do not meet the quality requirements shall be scrapped. Company website:
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