BWX SERIES BUTTERFLY VALVE The BWX series butterfly valve has been especially designed for a wide range of industrial applications. It can be used for standard temperature up to 425 °C with CS-body material as well as in cryogenic applications with high-quality CrNi steel. High efficiency by high flow capacity and low torques combined with fast maintenance capabilities, safety and reliable performance are the main highlights of this valve series. The compact design of the valve permits rapid temperature balance and minimizes especially in cryogenic cooldown processes the boil off loss.