Genuine Herz 1420246 differential pressure controller, engineered for precise regulation and maintenance of constant differential pressure in heating and cooling systems. This robust valve features a nominal diameter of DN 50 and is equipped with 1 1/2" (38.1 mm) external thread connections for secure installation. It includes two integrated test points (2xFTE) for convenient system monitoring and measurement. Constructed from high-quality brass, it is designed to withstand maximum operating temperatures up to 120 °C and operating pressures up to 16 bar, ensuring reliable performance in industrial HVAC applications.