Caleffi 108 Series Anti-Freeze Valve 32mm High Temp

The antifreeze valve allows the circuit medium to be drained when its temperature reaches an average value of 3°C. This prevents ice forming in the circuit of a system, generally with a heat pump, avoiding potential damage to the machine and to the pipes.

When the temperature of the water in the pipe drops below 3°C, the obturator of the antifreeze valve opens and drains off the water. The obturator closes when the medium temperature returns to 4°C.

Maximum working pressure: 10bar
Medium temperature range: 0–90°C
Ambient temperature range: -30–60°C
Opening temperature: 3°C
Closing temperature: 4°C