Thermal deaerator used in food processing industry

Thermal deaerator

A thermal deaerator is used for reducing the oxygen content of steam boiler feedwater. Without proper treatment, feedwater for steam boilers typically has a high oxygen content of 8-10 mg/l, which causes critical corrosion in the system.

Theory of operation
The condensate and the make-up water are mixed so that a temperature of 60-70°C is reached before conducted to the top of the deaerator. A nozzle vaporizes the water, so the gases can escape the layer that surrounds every single water molecule.

Steam is conducted to the bottom of the deaerator through a pressure reducing valve and steam injectors create the necessary turbulence in the water for an efficient deaeration. The excess gases are allowed to escape through a vent with a restriction.

Plant design

A thermal deaerator from EUROWATER is available in 12 modules with flow rates up to 40 m3/h and tank volume from 1,450 litres to 23,150 litres. The deaerator is constructed according to CE regulations. The deaerator tank is made of steel with a coating for corrosion protection. 

All units come with standard documentation for easy installation, operation, and maintenance.

Please contact your local sales and service office for data sheets and further information.

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Thermal deaerator

Scope of delivery

Reliable and efficient deaerator suitable for steam boilers supplied complete with fittings, i.e. steam pressure reducing valve and relief valve, level control, water level indicator, thermometer, and pressure gauge. 

Included in deliveryNot included
Thermal deaeratorConnecting pipe system
Steam regulation valveSupport stand
Relief valvePumps
Counter-mating flangesService valve



Insulate to prevent heat loss

Prevent the condensation of steam and loss of heat by insulating the deaerator, and in general all installations in contact with hot water. A deaerator from EUROWATER can be supplied insulated with 100 mm of mineral wool covered by aluminium plate.  

Insulated thermal deaerator to prevent heat loss


Sample cooler - monitor the work of the deaerator

Use a sample cooler to monitor the function of the boiler or the thermal deaerator. A sample cooler ensures efficient cooling according to the counter-current principle and no contamination of the sample. 

Download leaflet to read more about function and benefits.

Download leaflet 

Sample cooler for thermal deaerator

Industrial steam boilers

Thermal deaerator plays an important part in the optimum water treatment solution for industrial steam boilers.

Go to industrial steam boilers

Get the optimum solution

Selection of unit depends on application, water quality, and water consumption. We are at your service to ensure the optimum solution based on our combined know-how. Fill in the form and let us get back to you.

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