The valve, made from valve body, actuator and one pressure-preset spring, applies internal pressurizing structure, automatically adjusts and stabilizes the pressure by using the pressure change of medium itself. It is applicable for steam, weak corrosive gas or low-viscosity liquid, acting the differential pressure control in the pipeline, when the pressure difference rises up, the valve is opened.
Pressure Rating: ASME CLASS 150~300 (PN16~PN40)
Body material: Carbon steel, Stainless steel, Alloy steel, Duplex stainless steel
Seat Leakage：ANSI IV or ANSI Ⅵ(bubble-tight)