BLEEDING FOR STEAM BOILERS

> Mod. 660 A-EN ASME/ANSI

The water in the boiler contains salts, which are built up by the continuous evaporation. If these salts are not eliminated, bubbles and foam are formed when the density of the water increased.
To prevent these lime deposits forming, the water supply must be suitably treated, with the result that certain salts are changed producing impurities which form sludge and encrusted deposits which then adhere to the sides or the bottom of the boiler and to the combustion tubes, together with particles of dirt, remains of electrodes, carbonic acid, oxygen, etc. This leads to a high level of rust which may:

• Destroy the metal plate of the boiler, causing high maintenance costs.
• Produce thermic voltages, causing cracks in the metal plate and soldering cord.
• Notably slow down thermic transmission, meaning an unnecessary and excessive consumption of fuel.

Fabrication program
Catalogues by product
Complementary technical instructions 660-A MP-2
Categorisation C Є

> Mod. 560 EN ASME/ANSI

The continuous desalting valve is used to empty an adjustable quantity of water from the steam boiler, removing:

• Organic matter and mineral salts in solution. (Calcium, magnesium, sodium, potassium, iron, bicarbonate ions, chlorides, sulphates, nitrates, …etc.).
• Solid materials in suspension. (Sand, clay, metal residues, rock residues, organic matter, …etc.).

The continuous bleeding process prevents:

• Damage caused by erosion and perforation, entailing the following high costs:
  • Direct: Replacement or repair of materials.
  • Indirect: Stoppages, product losses, …etc.
  • Danger of boiler explosion.

And reduces:

• Incrustations and sediments caused by precipitation of calcium and magnesium salts, which obstruct thermic transmission and which cause unnecessary and excessive fuel consumption.
• Foam formation caused by excessive saline concentration, with its corresponding drag.

Fabrication program
Catalogues by product
Operating principles
Assembly and disassembly instructions
Categorisation C Є

> Mod. 560-A EN ASME/ANSI

The conductivity electrode EC-1, the desalting controller RD-1 and the continuous desalting valve with servomotor allow the automatic desalting process of boiler water which eliminates:

• Organic matter and mineral salts in solution. (Calcium, magnesium, sodium, potassium, iron, bicarbonate ions, chlorides, sulphates, nitrates, …etc.).
• Solid materials in suspension. (Sand, clay, metal residues, rock residues, organic matter, …etc.).

The continuous bleeding process prevents:

• Damage caused by erosion and perforation, entailing the following high costs:
  • Direct: Replacement or repair of materials.
  • Indirect: Stoppages, product losses, …etc.
  • Danger of boiler explosion.

And reduces:

• • Incrustations and sediments caused by precipitation of calcium and magnesium salts, which obstruct thermic transmission and which cause unnecessary and excessive fuel consumption.
  • Foam formation caused by excessive saline concentration, with its corresponding drag.
    This combination of measuring, comparison and control ensures minimum water loss and thus gives considerate energy savings.

Fabrication program
Catalogues by product EC-1
Catalogues by product EC-2
Operating principles
Assembly and disassembly instructions
Complementary technical instructions 560-A RD-1 & ARD-1 EC-1 EC-2
560-A Categorisation C Є
560-A EC-1 Categorisation C Є
560-A EC-2 Categorisation C Є
RD-1 Categorisation C Є
ARD-1 Categorisation C Є

> Mod. 560 DRM-1 ASME/FNPT

Effi cient monitoring of the purging of salts, dirt and sludge in a steam boiler requires regular analysis of the water in order to verify that its parameters are within the ideal levels af salinity and alkalinity demanded by law.
All the Continuous desalting valve (Mod. 560 and 560-A) are provided with taps for obtaining samples. As the water is extracted continuously 30 ÷ 50 mm. below the minimum level, the collection level is ideal and does not interfere with the control and level regulation devices.

Direct sampling is incorrect:

• • • • Losses by expansion increase the density of the water and falsify results.
      • There is an obvious physical risk involved.

The basic premise for conducting analyses correctly is to bring the samples from the tap of the Continuous desalting valve to the Samples water-cooled DRM-1, and bring them down to between 24 ÷ 26°C.

Fabrication program
Catalogues by product
Operating principles
Assembly and disassembly instructions
Categorisation C Є