Where are fire-safe valves used?
Fire-safe valves are designed to prevent flammable fluids from spreading in the event of a process line fire. The design uses metal back-up seats and an anti-static feature to prevent ignition. The biopharmaceutical and cosmetics industries often prefer fire-safe valves in alcohol delivery systems. • What are the acceptable seat materials for High Purity ball valves? FDA-USP23, Class VI approved seat materials for ball valves include; PTFE, RTFE, Kel-F, PEEK and TFM. SEAT MATERIAL SPECIFICATIONS CodeNameMaterial Temp (deg F)Pressure (Max) TTFETetrafluoroethylene-50 to 4501000 psi RRTFETFE + 15% glass-50 to 4501500 psi ATFM-PTFEpolytetrafluoroethylene-60 to 4751500 psi NNRGTFE + glass/carbon/graphite-20 to 6501500 psi DDelrinAcetal Homopolymer-70 to 1805000 psi VVX125% glass-filled/metal oxide-50 to 5001500 psi UUHMWPEPolyethylene-70 to 2001500 psi KPEEKPoly Ether Ether Ketone-20 to 6003000 psi NOTE: This table is provided as an indication of service range. Not all seats are considered
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