The SES TH Series from T-Lon provides universal application in severe operating conditions. The U-Cup seal design is made from PTFE and other polymer alloys and is mechanically energized with a corrosion resistant, Helical wound ribbon spring. The spring maintains a constant live compression load and is further energized by system pressure. The TH series is intended for static or very low dynamic applications and is available in standard and custom Rod, Piston and Face seal designs to meet your specific requirements.