The Herz 1400758 (often referred to with HD32SU in product descriptions) is a genuine Herz differential pressure controller, meticulously engineered for accurate and reliable regulation of differential pressure in heating, ventilation, and air conditioning (HVAC) systems, as well as various industrial applications. This robust valve features a nominal diameter of DN80 and 2xFTE flange type end connections, ensuring secure integration into piping systems. Constructed from durable cast iron EN-GJL-250, it guarantees longevity and consistent performance under demanding operational conditions. The controller is rated for a nominal pressure of PN16 and can operate efficiently within a broad temperature range of -10 °C to 120 °C. It handles a maximum differential pressure of 16 bar and offers a precise control range of 0.2 to 0.6 bar. The valve is designed with a 1 1/2 inch drive for seamless actuator connection.