- Prior to installation, check for the correct material specification, trade name and manufacturer. Check that the O-ring (and backup ring if specified) is the correct size, undamaged and clean. Template gauges are recommended for checking larger O-ring sizes.
- Follow the manufacturer’s recommended installation instructions. This applies to both the O-ring manufacturer and the equipment manufacturer.
- Check the condition of the ring groove and any bearing surfaces. Ensure that they are thoroughly cleaned with a recommended cleanser and dried before installation of the O-ring. Note: Many cleaning of degreasing agents may chemically attack the elastomer.
- O-rings may be lubricated only where specified lubricants are recommended by the supplier.
- Always use fully molded O-rings.
- Take care not to cut, pinch or shear an O-ring when assembling the joint.
- Never force or stretch the O-ring into a groove for which it is not specifically designed.
- Do not use unmarked O-rings or O-rings that have not been stored in the supplier’s packing.
- Do not install an O-ring with an expired shelf life.
- Do not make up an O-ring joint if the previous O-ring showed evidence of failure. Check with your Engineering Department first.
- Never cut O-rings to size and then glue or bond back together.
- Do not estimate O-ring dimensions from the groove dimensions. Only use the schematic, arrangement drawing or parts list for the equipment you are dealing with.
- Do not re-use hard back-up rings. New back-up rings must be fitted when installing new O-rings.