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Description 1/2 In Dual Control, Regulator And Relief Valve, Npt Thread_This 1/2 inch dual control regulator and relief valve is for use in commercial and residential hydronic heating systems to fill the boiler and piping system with water, and to maintain water pressure in the system at all times. It also provides make-up water to the system in the event of system leaks. It consists of an iron and bronze body construction with NPT threaded inlet and outlet connections, an attached iron body, diaphragm relief valve, a tight seating check valve, purge lever for manual purging, and a stainless steel strainer. It has high capacity performance and a simplified servicing design. It is suitable for use in the boiler feed lines of hydronic heating systems. The maximum pressure is 100 psi (6.9 bar)._High capacity_Stainless steel strainer_Purge lever_Tight seating check valve_Specifications_Adjustable Reduced Pressure Range 10 to 25_Adjustable Reduced Pressure Range-BAR 0.7 to 1.7_Body Material Iron_Brand Watts_Corrosion Resistant Coating No_Disc Material Silicone_EAN 098268025545_Gauge Option No Gauge_High Pressure Reduced Pressure Range N/A_High Pressure Reduced Pressure Setting N/A_Inlet Connection Size 1/2 IN_Inlet Connection Type Female Threaded_Inlet Thread Type NPT_Lead Free NO_Maximum Operating Temperature-Celsius 100.00_Maximum Operating Temperature-Fahrenheit 212_Maximum Working Pressure-BAR 6.90_Maximum Working Pressure-PSI 100_Minimum Temperature - Celsius 0.50_Minimum Temperature-Fahrenheit 33_Outlet Connection Size 1/2 IN_Outlet Connection Type Female Threaded_Outlet Thread Type NPT_Part Number 0388798_Series 1450F_Standard Reduced Pressure Setting-BAR 2.00_Standard Reduced Pressure Setting-PSI 30_Strainer Yes_Strainer Material Stainless Steel_Thermal Expansion Bypass No_Valve Style Standard