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O-rings

Polymax India Blog - O-rings
  • Buyers Guide to Oil Seals, Lip Seals and Rotary Shaft Seals

    Oil Seals and Rotary Seals at Polymax

    We now sell over 6,300 oil seals on our website! Lip seals or rotary shaft seals are vital components for all types of engineering machinery. As a result, we've created a guide our guide to help you choose the correct seal for your application, you can then continue to our new Oil Seal section to make your purchase.

    Oil Seal Cross Reference Guide
    What are they? Oil Seals are used in driveshafts, crankshafts and hydraulic cylinders where a rotating shaft is lubricated by oil or grease. They are metal caps covered in rubber with a garter spring supporting the inner lip.

      Continue reading

  • What is the Best High Temperature O-ring Material?

    Heat is one of the most destructive forces in compound deterioration. To decide which is the best high temperature O-ring, it is important to consider other factors such as the required chemical resistance. For high temperature applications (over 150°C) you may wish to consider using one of the following materials; FKM, FFKM, ACM, HNBR, VMQ, FVMQ, AFLAS, PTFE and FEP.

    The Best High Temperature O-ring Chart Continue reading
  • Viton® and EPDM - What is the Difference?

    Viton® and EPDM are elastomers that are commonly used for O-rings. Both are types of rubber polymers that are compounded for low compression set. This means that they will recover well after a fixed time under specified squeeze at a given temperature. Both elastomers are also highly flexible and can be stretched to a great extent, without breaking. Such elastomers are commonly used as gasket material, but are also employed for making valves, pumps, and related components.

    Viton®  rubber is a fluoro elastomer, whereas epdm rubber is ethylene-propylene-diene-monomer. The primary differences between Viton®  and EPDM is in their chemical resistance and temperature ranges. Both have different properties and applications for general industrial use. Having sufficient knowledge of the differences between the two can help you make a better-informed decision. Continue reading

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