The Herz 2638805 is a genuine OEM upper part designed for Herz STRÖMAX-MW+RW two-way regulating valves. This DN40 component is constructed from durable red brass (Rotguss) and is suitable for use with water in heating and cooling systems. It features drainage and filling capabilities, along with a measuring nipple for precise system adjustments. Engineered for reliable performance, it has a nominal pressure rating of PN 16 and operates effectively within a temperature range of -20 °C to 110 °C. Its compact design ensures efficient integration into existing valve assemblies.