Afriso Differenzdruck-Überströmventil DÜ 3/4" Eckausführung Defro the integrated over-temperature switch (STB)

the integrated over-temperature switch (STB) reliably protects against overheating at a tripping temperature of 85°C (±5°C)

thus avoiding long periods of chimney inactivity

Return temperature boost 60°C or 70°C including insulation and 3 x 1¼" ball valves

air-dried wood with a moisture content of less than 20% is recommended

Auch mit 1- oder 2-fachem Multifunktionsschacht (Luftschacht) lieferbar

Afriso Differenzdruck-Überströmventil DÜ 3/4" Eckausführung Defro the integrated over-temperature switch (STB)Afriso differential pressure overflow valve D 3 4" Corner design Application The differential pressure bypass valve serves to maintain constant pump pressure in closed heating systems according to EN 12828 and simultaneously reduces disruptive flow noise. It ensures that the delivery head of the circulation pump remains stable even with changing valve positions and partial load. The corner version is particularly suitable for confined installation