PTFE Seat Ring for Butterfly Valves Virgin PTFE Tube are generally made of thermoplastic materials like PTFE. They're great for applications where chemical compatibility is important, and where the tightest seal is key.Colorful Virgin PTFE is a key components for butterfly valves. Based on different application,White Virgin PTFE can be added some fillers for PTFE,which not only keeps the original properties,but also enhanced the rigidity,anti-abrasion,anti-deformation,thermal conductivity,etc.,and thus improved the overall performance of PTFE.Commonly used fillers are :Glass fiber,graphite,carbon fiber,molybdenum disulfide,copper powder,Ekonol(polyphenyl ester,PEEK etc. Sample: Freely Business type: Manufacturer Delivery time: 10~15days