Heat Pump Components

● Working temperature range: - 10 - 95°C (without the formation of ice)
● Max working pressure: 4 bar
● Finish: PPE Insulation
● Max. percentage of glycol: 30%
● Front probe holder connection ¼” F
● Body: Stainless Steel

● Finish: Brass
● Discharge pressure 2.5 bar
● Max temp 120°C

The antifreeze valve allows the circuit medium to be drained when the temperature reaches an average of 3˚C.

This prevents ice forming in the circuit of a system, generally with a heat pump, avoiding potential damage to equipment, valves and pipework.

The valves are suitable for a variety of fittings and pipes connected by a union.

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.

The version with the air sensor allows the system to work in cooling mode, even when the water temperature is approaching 3 °C. In these conditions the air sensor cuts in to prevent water drainage.

The antifreeze valve is a mechanical protection system that discharge the water contained in the hydronic system. When the temperature of the water in the pipe drops below 3 °C, the antifreeze valve opens and drains.

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

Designed for use with Heat Pumps using R290 as medium. The latest iStop Anti-freeze valve from Caleffi is ideal for use on installations where higher supply temperatures can be reached, such as R290 heat pumps.

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