Sunpass FEP-encapsulated 'O' rings have a resilient core of silicone (VMQ) elastomer completely covered with a bleedline-free sheath of FEP fluoropolymer.They are fully interchangeable with standard elastomeric 'O' rings and solid PTFE 'O' ringsAdvantages:Excellent chemical resistance to a wide range of fluid media. High level of hygiene for use with foodstuffs and edible oils. Far better elasticity and seal ability than solid PTFE rings. Operational temperature range of -60°C to 200°C.Other 'O' ring material and size are available on requestOrdering and code information:SUNPASS CODEMATERIALAPPLICATIONSIZEV00003VitonO' RingFO00002FEP/SIL.3" FootvalveID: Φ78.74MMX Section Φ5.33MMΒS338FO00004FEP Incapsulated O Ring2.5" PRV/safety relief valveID: Φ65.50MMX Section Φ5.7MMFO00005FEP/SIL.PV Valve Vacuum ' O' RingID: Φ31.34MMX Section Φ3.55MMFO00006FEP VitonEncapsulatedO RingID: Φ50.39MMX Section Φ3.53MMFO00007FEP/SIL.Manlid SealDN500ID486Xsection16MM(round)FO00008FEP/SIL.Foot ValveO-RingID: Φ69.22MMX Section Φ5.33MMBS335FO00009FEP Encapsulated Silicon3" FootvalveFEP/SIL. 75.57X5.33MM BS337/MHF Website:://.tenglongsealings.com