Autoclave Engineers 2 way ball valves to 20,000 psi. A one-piece, trunnion mounted style, stem design eliminates shear failure and reduces the effects of side loading found in two piece designs. The valves come with re-torqueable seat glands for longer seat life. The PEEK seats offer excellent resistance to chemicals, heat, and wear/abrasion. Included are a full-port flow path which minimizes pressure drop and a low friction pressure assisted graphite filled PTFE stem seal that increases cycle life and reduces operating torque. The valves include 316 cold worked stainless steel construction and viton o-rings for operation from 0°F (-17.8°C) to 400°F (204°C).