The automatic filling unit is a device consisting of a pressure reducing valve with compensating seat, an inlet strainer, a shut-off valve and a check valve. It is installed in the water supply pipework in sealed heating systems and its main function is to maintain the system pressure stable at a set value, automatically topping up with water, as required.

After installation, during the filling or topping-up phase, feed will stop when the set pressure is reached.

 

Setting pressure range: 0,3–4 bar.
Max. inlet pressure: 16 bar.
Max. working temperature: 70°C.