Filled PTFE Hydraulic Seal Big Size Piston Seal We are professional in big ptfe seals. Dust Ring are over 25 sets of CNC lathes for machining OD range 10~3000mm PTFE seals as per drawing with high precision. The seals material can be virgin PTFE, bronze, carbon, glass, MoS2 filled PTFE according to different working circumstance. Application: Hydraulic,compressor Business type: Manufacturer Delivery time:10~20days