Pressure Relief Sustaining Control Valve, DN100, PN10, QT450

Constructed from durable materials such as ductile cast iron, cast steel, and stainless steel, our pressure relief/sustaining control valve is available in sizes ranging from DN50 to DN800 (2 inches to 32 inches). It supports pressure ratings of PN10, PN16, and PN25, with flanged end connections for easy installation. This versatile valve system includes a main valve, a pressure relief/sustaining pilot valve, a needle valve, a ball valve, a microform filter, and a pressure gauge. It operates hydraulically, offering dual functionality as a pressure relief valve—maintaining water supply pressure below a preset safety limit—and as a pressure sustaining valve—ensuring upstream pressure remains above a specified value for consistent water supply.