The Bray/McCannalok high-performance, high-pressure, high and low temperature butterfly valve . Full rated ANSI Class 150, 300 & 600 valves in wafer and lug bodies. The unique, two part seat design features an energized O-ring fully encapsulated in the RTFE seat for bi-directional bubble-tight shut-off under high pressure, low pressure and vacuum. A double offset stem and disc design reduces seat wear, extends service life and reduces torque. A superior Fire Safe version is available. The temperature range of the Series 40 is from -20°F (-20°C) to 500°F (260°C) with operating pressures up to 1480 psi (102 bar).