STEP SEAL SUPPLIER. We are the prominent importer and suppliers of a wide range of STEP SEAL to our clients STEP SEAL has a special filled PTFE ring with a pre-loaded lip energized by an O-ring. The lip is designed to have a contact area with the rod adequate to retain the media at low pressure. As high pressure acts on the O-ring it compresses the lip against the rod increasing the contact area and the effectiveness of the seal. Standard STEP SEALS are supplied with a nitrile O-ring. But other materials can be provided on request. Advantages:  High static and dynamic sealing effect  Compact housing  Low friction, increasing performance and working life.