This SAE Aerospace Recommended Practice (ARP) provides an overview of the various types of polytetrafluoroethylene (PTFE and TFE) back up rings for hydraulic and pneumatic fluid power applications@ including their advantages and disadvantages. Purpose To help the user selecting the right backup ring@ this document provides guidance in the selection of backup rings for various applications. It also identifies older designs that are no longer recommended.
SAE ARP1802B-2014 history
2014SAE ARP1802B-2014 Selection and Application of Polytetrafluoroethylene (PTFE or TFE) Backup Rings for Hydraulic and Pneumatic Fluid Power Applications
1992SAE ARP1802A-1992 Selection and Application of Polytetrafluoroethylene (PTFE or TFE) Backup Rings for Hydraulic and Pneumatic Fluid Power Applications
1983SAE ARP1802-1983 SELECTION AND APPLICATION OF POLYTETRAFLUOROETHYLENE (PTFE OR TFE) BACKUP RINGS FOR HYDRAULIC AND PNEUMATIC FLUID POWER APPLICATIONS