T680 Metal Bellows Seal Application Range Temperature : -75 to +200 deg. C (-100 to +400 deg. F) Pressure : Vacuum to 20 bar (300 psi) Peripheral Speed : max. 25 m/s (75 ft/s) Viscosity : max. 600 cP Solid Content : max. 0.10% by weight Materials of Construction Seal Face : Resin Impregnated Carbon O-ring : Fluoroelastomer Bellows : SUS 316 L Metal Parts : SUS 316