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What should be done before the O-ring is installed

by:ORK      2022-11-20
O-ring sealing method: according to the type of load, it can be divided into static seal and dynamic seal; according to the main purpose of the seal, it can be divided into hole seal, shaft seal and rotary shaft seal; according to its installation method, it can be divided into axial installation and radial installation. When installing axially, for the shaft seal, the error between the inner diameter of the O-ring and the diameter d2 to be sealed should be as small as possible; for the hole seal, the inner diameter should be equal to or slightly lower than the diameter d1 of the pipe groove . Substances and standards in O-ring work: When actually selecting the raw materials of O ring manufactures, the compatibility with the substances in work should be considered first. It is also necessary to comprehensively consider the working pressure, temperature, continuous working time, operation cycle time and other work standards at the seal. When installing the O-ring, it is necessary to maintain the cleaning of the installation environment, especially to prevent dust from entering the installation site. If hard particles enter, it is likely to cause serious damage to the surface of the O-ring during the entire operation. In turn, the overall service life of the product is reduced, and the damage of the surface material will also increase the corrosion effect of the internal chemical substances such as fuel, which will lead to greater damage after a period of use. Before installation, the surface of the O-ring should be cleaned, and the installation part, especially the contact surface, should be completely cleaned. One is to better improve the contact surface between the O-ring and the sealing member, and have a more stable sealing The actual effect, in addition, is that the surface of the machine can be inspected, and if there are slight gaps and unevenness, it can be dealt with and maintained in time. Therefore, in the whole process of installing the O-ring, it is necessary to ensure the installation environment and the cleaning of the surface of the O-ring, and solve a part of the key points, so that not only can the sealing effect of the O-ring be fully utilized, but also It can also increase the service life of the product and prevent the occurrence of unexpected and serious damage. O ring manufactures are subject to various external environmental factors, such as: distortion, CO2, active oxygen, sunlight, pyrogen, wet and cold, refined oil, or the harm of organic chemicals and organic solvents, etc. O ring manufactures are likely to Invalid due to changes to its physics. In DIN7716, ISO2230, DIN9088 and other specifications, the basic requirements for the storage, cleaning and maintenance of vulcanized rubber seals are met. 1. Temperature: 5-25℃ is the ideal storage temperature. Should prevent exposure to heat and sunlight. Seals removed from cryogenic storage should be placed in a natural environment at 20°C before application. 2. Ambient humidity: The air humidity in the warehouse should be lower than 70%, to prevent excessive wetness or excessive dryness, and do not appear suspicious. 3. Sunlight exposure: Avoid sunlight and strong human light sources with ultraviolet light. UV-blocking bags provide the best protection. It is recommended that the windows of the warehouse be painted with bright red or orange architectural paint or plastic film. 4. Radiation source: prevent electromagnetic wave radiation from damaging the seal. 5. Oxygen and reactive oxygen species: Elastomer materials should be protected from exposure to fluid air in the circulatory system. This can be accomplished by packaging, coiling, storage in air-tight containers, or other suitable means. Active oxygen is harmful to most polyurethane elastomers, and the following machinery and equipment are prevented in the warehouse: liquid mercury vapor lamps, high-voltage electrical machinery and equipment, motors and other machinery and equipment. 6. Deformation: products should be placed in random conditions as much as possible to prevent tension, shrinkage or other deformations. 7. Contact with liquid or semi-solid raw materials: Do not contact with organic solvents, oils, greases or other semi-solid raw materials. 8. Contact with metal materials or non-metal materials: It is not allowed to contact permanent magnet materials, pig iron, copper and aluminum alloys, or with raw materials that will destroy vulcanized rubber. Seals cannot be packaged with PVC material. Seals of different materials cannot be mixed. 9. Cleaning: If necessary, soap and water can be used to clean the seals. However, water cannot contact chemical fiber enhanced seals, vulcanized rubber metal material adhesive seals, and AU raw material seals. Disinfectants, solvents and special tools with sharp edges should not be used. The cleaned seals should be dried at room temperature and should not be close to the pyrogen.
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