The Herz 4007 DN150 differential pressure regulator (part number 3AH6W3) is a high-quality component designed for maintaining a constant differential pressure in heating and cooling systems. Constructed from durable grey cast iron (GG25 / EN-GJL-250) and rated for PN16 nominal pressure, it ensures reliable performance up to 16 bar operating pressure and 120 °C operating temperature. It features flange connections conforming to EN 1092-2, PN16, and offers a precise differential pressure setting range from 0.05 to 2 bar. This regulator is essential for optimizing system efficiency and stability in industrial and commercial HVAC applications.