Continuous Bleeding and Venting Valves, Sturdy Valves of Cast SteelEB 1.10, 1.11, for larger air volumes, e.g. on sand filters, stainless steel float and lever control the valve shut-off, EB 1.11 with external float, EB 1.20 for maximum air volumes | valve cone with soft or metallic seal | body made of GGG-40, GS-C25 | for contaminated and foaming media, available with various coating types