The Herz Armaturen Strömax-DW shut-off valve, part number 2421534, is a high-quality valve designed for precise flow regulation and isolation in heating and cooling systems. Featuring a non-rising spindle, it includes a drain valve, test connection, and two measuring connections for accurate differential pressure measurement. The valve body is constructed from dezincification-resistant brass, with a stainless steel spindle, EPDM O-ring seals, and PTFE seat seals, ensuring durability and reliable performance up to 16 bar operating pressure and 110 °C. It connects via an internal thread and is equipped with a plastic handwheel for manual operation.