Caleffi 573009A Automatic Fill 1/2 Inch Sweat Brass

CALEFFI 573009A AutoFill Automatic Filling Valve with Backflow Preventer 1/2" sweat inlet x 1/2" F NPT outlet The CALEFFI Autofill? is unlike traditional boiler fill valves, Autofill? automatically and quickly fills the system to the preset pressure and shuts off. With the optional pressure gauge the system pressure can be viewed and adjusted as needed, no more guessing. Pre-adjustable, automatic filling valve with backflow preventer. Brass body. Max inlet pressure: 175 psi Max working temp: 150?F Setting pressure range: 3 - 60 psi Preset outlet pressure:15 psi Function The automatic filling valve is a device consisting of a pressure reducing valve with compensating seat, visual system pressure setting indicator, an inlet filter, anti-scale internal parts, a shut-off valve (round knob on bottom) and a Check Valve . It is installed on the water inlet piping in sealed heating systems, and its main function is to maintain the pressure of the system at a set value, automatically filling up with water as required. The valve is pre-adjustable, meaning it can be set to the desired pressure value before the system charging phase. After installation, during the filling or topping-off phase, the water feed will stop when the set pressure is reached. This valve fills 50% faster than other valves. There are no levers to flip or valve to close. Pre-assembled with the 573 series backflow preventer, the AutoFill? Combo features an atmospheric vent which is designed to protect drinking water systems from return fl ow, caused by back-siphoning or back pressure, of contaminated fluids. The 573 series has been specifically certified to standards CSA B64.3 and ASSE 1012. Product Features Automatic Fast-filling: Fast fills the system to set pressure then automatically shuts off the water feed. No levers to flip or valves to close. Maintains stable pressure at pre-setting: Fill the system to a set pressure and maintain that pressure setting regardless of inlet pressure variations. Anti-scale polymer materials: Prevents scaling on internal sliding surfaces, assuring stable pressure control and long operating life. Built-in shut-off valve and Check Valve : Allows isolation of system from supply and Check Valve prevents loss of system pressure if the supply water drops below system pressure. Pre-calibration: Before charging the system, use a screwdriver to turn dial to intended system pressure. Downstream pressure gauge is not required. Optional pre-assembly with low-lead ASSE 1012 dual-check backflow preventer: Saves time and reduces space requirements. Want to learn more about this AutoFill Combo with backflow preventer? Read our blog about boiler repair parts here.