The Herz Armaturen CGNBAY is a differential pressure regulator, identified as an equivalent to the genuine Herz Armaturen F400730. This Series 4007 regulator features a nominal diameter of DN125 and flange connections, designed for precise control of differential pressure in heating, cooling, and ventilation systems. Constructed with a robust cast iron body, stainless steel spindle, and EPDM diaphragm and seals, it ensures reliable operation up to PN16 operating pressure and a maximum temperature of 130°C, maintaining a constant differential pressure range of 0.2 to 1.0 bar.