Idiomas disponibles
Idiomas disponibles
Heat exchanger PWT 510 / PWT 910 / Operation
7.4.4 Cleaning product
A quality cleaning product is a product that is able to remove the deposits on the plates without damaging
the plates and seals.
Stainless steel is covered with a protective film. This film must not be destroyed as it ensures that the
corrosion resistance of the stainless steel is maintained.
7.4.5 Special cleaning product
Oil and fat can be removed using an emulsifying water/oil solvent.
Organic materials and fats can be removed using sodium hydroxide (NaOH) at a maximum concentration
of 3% and at a temperature of 85°C. The concentration corresponds to 10 litres.
30% NaOH in 100 litres of water.
Calcium deposits can be removed using nitric acid (HNO3) at a maximum concentration of 6% and
a maximum temperature of 65°C. The concentration corresponds to 9.6 litres.
62% nitric acid in 100 litres of water. The nitric acid supports the formation of the protective film on the
stainless steel.
7.4.7 Special cleaning product
Oil and fat can be removed using an emulsifying water/oil solvent.
Organic materials and fats can be removed using sodium hydroxide (NaOH) at a maximum concentration
of 3% and at a temperature of 85°C. The concentration corresponds to 10 litres.
30% NaOH in 100 litres of water.
Calcium deposits can be removed using nitric acid (HNO3) at a maximum concentration of 6% and
a maximum temperature of 65°C. The concentration corresponds to 9.6 litres.
62% nitric acid in 100 litres of water. The nitric acid supports the formation of the protective film on the
stainless steel.
7.4.6 Cleaning control
A quality cleaning product is a product that is able to remove the deposits on the plates without damaging
the plates and seals.
Stainless steel is covered with a protective film. This film must not be destroyed as it ensures that the
corrosion resistance of the stainless steel is maintained.
7.5 Replacing the plates
The requirements for replacing plates and mounting new ones are that the power has been switched
off and that expanding screws have been removed. Before inserting the replacement plates, you must
check whether they are identical to the plates being replaced. It is possible to reduce the number of
plates, but only if the plates are removed in pairs so that the plate package can once again be mounted
using the same right/left plan afterwards. All 4 openings must be open for the removed plates. After such
a reduction, the tension dimension will need to be determined again.
Reducing the number of plates means that the heat exchange area of the equipment is reduced
proportionally to the plates removed. It also means higher pressure losses in the equipment.
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