teflon Bellow Seal is a Chemical Resistant, Outside Balanced Externally Mounted On Extremely Corrosive Duties Including Acids, Salts, Active Organic Compounds, Strong Oxidising and Reducing Agents. all Components Which Comes in Contact with the Liquid Being Sealed are Made of Chemically Inert Materials I.e. Ptfe and Highly Corrosion Resistant Materials. the Seal Has No Dynamic Elastomers and Hence, No Fretting Damage On the Shaft. the Non-pusher Bellow Hydraulically Balanced Contour Eliminates Sliding Contact with Equipment's Shaft or Shaft Sleeves During Operation. the Seal is Mounted On the Shaft or Sleeve Surface Externally, and the Ptfe Bellow Convolution Extend to Components for Seal Face Wear. the Rotary Face is Replaceable On Seat Without Affecting the Seal Settings. this Permits to Replace the Face Which Tends to High Wear and Tear, the Efficient Cost Saving Features with this Seal.