Caleffi Pre-adjustable automatic filling group. 553 Series

Caleffi automatic filling group without pressure gauge cod. 553040

The automatic filling group is a device composed of a pressure reducer with compensated seat, an inlet filter, a shut-off valve and a check valve.

It must be installed on the water supply pipe in closed circuit heating systems and its main function is to keep the system pressure stable, at a set value, automatically replenishing the missing water.

After installation, during the filling or replenishment phase, the supply will stop when the calibration pressure is reached.

• Connection: G 1/2" A (ISO 228-1) M, inlet.
• Connection: G 1/2" (ISO 228-1) F, outlet.
• Maximum upstream pressure: 16 bar.
• Fluid temperature range: 5–70°C.
• Pressure adjustment range: 0.3–4 bar.

Data sheet

Instructions