For preventing condensation

In the process of burning, among others also water releases from burning fuels in the form of steam. If the flue gas temperature is high enough, the steam exits through a chimney together with flue gas. However, if the flue gas cools down at a certain spot, condensation occurs. Condensate forms, containing further combustion products that can be very aggressive, esp. when burning wood or solid fuels, and can cause corrosion very quickly as well as clog heat transfer surfaces.

TSV1 and TSV2 thermostatic mixing valves mix cold return water with hot water from the boiler outlet. This way the whole heat exchanger (heat transfer surfaces) is kept warmer, at temperatures that will not allow condensation to occur and so clogging and quick corrosion will be prevented. Clogged heat transfer surfaces deteriorate boiler efficiency substantially and increase the risk of scale formation.

Quick corrosion and clogging will not occur if the heat transfer surfaces are warm enough as condensation will not occur above certain temperatures. The heat transfer surfaces will be warmer, making their service life longer and the boiler efficiency higher. These valves are fitted with thermostatic valves by a renowned French manufacturer.

Thermostatic mixing valve TSV3

 TSV3 Thermostatic 3-way Valve – Installation and operation instructions

  • DN 25 with G1“ F thread
  • outlet temp. 65 °C (optionally 55, 77 °C)
  • for boilers of up to 25 kW output
Termostatic mixing valve TSV3 46°C 10741
Termostatic mixing valve TSV3 55°C 10348
Termostatic mixing valve TSV3 65°C 10347
Termostatic mixing valve TSV3 77°C 10742
Termostatic mixing valve TSV3B 65°C 10080



Thermostatic Mixing Valve TSV2

  • DN 50 with 2″ male thread
  • outlet temp. 61 °C (optionally 85 °C)
  • choice of female G5/4″, 6/4″ and 2″ threaded couplings
  • for boilers of 26 to 100 kW output
TSV2 5/4  – thermostatic valve incl. screw joints 5/4″ 6544
TSV2 6/4  – thermostatic valve incl. screw joints 6/4″ 6563
TSV2 2  – thermostatic valve incl. screw joints 2″ 6564