T604 Metal Bellows Seal Application Range Temperature : -75 to +425 deg. C (-100 to +800 deg. F) Pressure : Single-ply Vacuum to 20 bar (300 psi) Double-ply Vacuum to 70 bar (1000 psi) Peripheral Speed : max. 50 m/s (150 ft/s) Viscosity : max. 1000 cP Solid Content : max. 0.20% by weight Materials of Construction Seal Face : Resin Impregnated Carbon O-ring : Graphite Foil Bellows : Inconel 718 or AM 350 Metal Parts : SUS 316