Caleffi 553642a 1/2 Npt Autofill Boiler Feed Valve W/ Pressure Gauge

553642A 553 Series Autofill 1/2NPT Inlet X 1/2NPT Outlet with Pressure Gauge 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. FEATURES Pre-adjustable, automatic filling valve. Anti-scale with visual system pressure indicator. Complete with manual shut-off valve, strainer and check valve. Brass body. Max inlet pressure: 230 psi Max working temp: 150 ?F Setting pressure range: 3 - 60 psi Preset outlet pressure: 15 psi Pressure gauge scale: 0 - 60 psi / 0 - 4 bar