Flue gas dampers (butterfly valve) are installed in the connection pipe between a boiler and the chimney and close the flue gas path, if the chimney is no longer in use. This prevents the cooling down of the heat generator and the installation room, which helps to save energy.
Furthermore in the case of cascade systems, you also avoid possible inflow of flue gases from other fireplaces connected to the chimney into the installation room and cause a certain amount of sound insulation (attenuation) in the case of multiple-use chimneys. We offer both manually closing dampers and automatically closing dampers with an electric servomotor, controlled by the boiler.
To compensate the undesired pressure fluctuations in the connection pipe we offer different relief valves. In case of implosion we recommend the use of Joukowsky implosion relief valve. For explosion we offer the pressure relief valve.
Stainless steel or black steel flue gas dampers made by Jeremias are used in combined heat and power plants, emergency power systems, exhaust air technologies and in over pressure operation engines.
Motorised flue dampers
Implosion relief valve to compensate unwanted pressure fluctuations