Caleffi 553140 Automatic Filling Fitting 1/2 Inch Calcification Insensitive Internal Preset with Pressure Gauge

Description

Function The automatic filling fitting consists of a pressure regulator with compensating valve seat, a mud flap in the entrance, a shut-off valve and a backflow preventer. It is installed in the water inlet pipe of closed heating systems and its main task is to keep the system pressure stable at a set value and ensure the automatic overflow of missing water. After installation, the water inlet stops in the filling or refilling phase when the setting pressure is reached.