Dust ring dust ring price _ _ _ Guoming wiper standard plastic

O-ring is one of the most versatile, most reliable seal seal products, but if the O-rings or improper use, there will be poor seal or leak case, even O-rings were bitten other cases, usually have the following situations: Slotted size 1 / O-ring design is unreasonable, appeared tolerance, especially when their size is too large, resulting in O-rings after the compression deformation amount insufficient to affect the sealing effect. General O-ring after installation compressive deformation amount should be between 18% to 22%, a large O-ring cross-sectional dimensions smaller relative deformation of the compression, and cross-sectional dimensions smaller compression deformation amount is relatively large. 2 / size as the actual installation dimensions O-ring too much difference, form an O-ring work at the reduced cross-sectional dimension after stretching condition, resulting in insufficient compression deformation amount of leakage. 3 / When installing O-ring seal surface is not smooth chamfer or round and scratch the O-ring and cause leakage. 4 / O-ring for sealing the material does not apply to media failure is eroded. 5 / O-ring after a long period of use will deteriorate, and after elasticity or failure, so the equipment overhaul generally replace the O-ring. Silicone rubber (VMQ) Advantages: high temperature, low temperature performance, temperature -100 ℃ ~ 300 ℃, high temperature performance and Viton fairly low temperature performance is the highest level of all the rubber. Odorless and tasteless, resistance to deformation, dielectric properties, ozone resistance and superb resistance to atmospheric aging, but also has excellent biomedical properties. Disadvantages: tensile strength and tear and other mechanical performance is poor. Temperature range: -60 ℃ to 225 ℃, special silicone rubber high temperature up to 300 ℃, and the low temperature to -100 ℃. Hardness: Shore A hardness of 25 degrees to 90 degrees. Color: black, brown, white, also can be customer specified color. Applications: Silicone rubber in extreme environments and temperatures well, commonly used in automotive and aerospace industries and other life on resilient demanding fields. Is FDA approved material for food processing equipment, typically used in medical and food industries.