PURE POLITEF® BELLOWS Bellows, which are produced from polytetrafluoroethylene (PTFE) material are common at chemical industry. They provide very successful results even at very active conditions due to their chemical and thermal resistance. They are used especially as elongation at chemical pipe lines, as receivers at events like stroke and vibration. At acidic environments, mechanical packing-box bellows are used as compensators or to provide vibration absorption.