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6 m³/h or 3
there is a manual pump control available
Maximum flow rate: 2
such as the double thermal relief valve
caleffi double drain safety device pkb20 6 m³/h or 3Caleffi double thermal safety valve " opens at 90 100C Double thermal safety valve with built in refill for wood burning stoves and boilers with water jacket The double thermal relief valve is used as a safety device in heating systems with solid fuel heat generators. The device combines a thermal relief valve and a filling valve in a single unit, which are activated simultaneously with positive safety when controlled by a remote sensor. When the