Retrofitting means upgrading the existing equipment to improve the efficiency and performance of the equipment. Retrofitting is usually performed in large scale industries such as cement industry, power plant industry where a complete new installation consumes huge amount of time and money.

1. Retrofitting of Industrial Fans
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2. Retrofitting means upgrading the existing equipment to
improve the efficiency and performance of the equipment.
Retrofitting is usually performed in large scale industries
such as cement industry, power plant industry where a
complete new installation consumes huge amount of time
and money. The basic need for retrofitting in industrial
fans is to improve the performance of the existing fan.
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3. Need for retrofitting
• Optimization of existing fans
• Retrofitting of industrial fan involves adding or replacing a
component to the existing fan system in order to achieve
increased performance. Coming to retrofitting of industrial
fans, it will be something like change in system resistance
either to increase or decrease depending on need. Industrial
fans start to decrease its performance after some period of
time. With retrofitting one can optimize the existing fan.
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4. • Economic alternative
> Retrofit uses maximum availability of existing equipment
and which is a economic alternative than a complete new
installation. Retrofit combines the advantages of existing
equipment and new equipment which is a cost saving option.
> Retrofitting involves simple assembly which does not
require a skilled labor who is expensive than a regular man power.
> If we take the case of installing a complete new system in
the plant, we have to shut down the entire system for a longer
period of time. If we perform retrofitting, as it involves installation
of parts, it will consume less time for installation and decreases the
shutdown period. This regulates the overall loss to the plant.
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5. • Regulate pollution
> Retrofitting indirectly helps in regulating the
pollution. As the performance of a fan is increased, a fan
will use minimum resources for optimum performance by
regulating wastage. Secondly, when the fan is retrofitted
the amount of air supplied or amount of exhaust gases
removed will be optimum from the process or from the
work place (in case of ventilation systems). This helps in
optimum performance of system which in turn helps in
regulation of pollution.
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6. Keys ways of retrofitting
• When the flow of a fan is reduced, rotor and inlet cone
are replaced in order to enhance flow and pressure for the
same input power of an industrial fan.
• Industrial fan also consists of small parts which are to be
changed to obtain an increased efficiency. The parts which
are involved are casing of fan, inlet boxes, dampers and
silencers etc.
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7. • Bearings in fan are one of the most important parts; the
life period of a fan depends on the working condition of a
bearing. Changing bearings will ensure more life and
lesser maintenance for an industrial fan.
• Industrial fan consists of rotating parts, which cause
wear of the material. By coating wear resistant material on
rotor or any other parts of fan will result in good wear life.
• Industrial fan also produces a lot of noise; the level of
noise can be minimized by retrofitting silencers or
dampers to the fan.
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8. Retrofitting is a better alternative to optimize fan
performance. It also has many advantages and can be
easily performed with less investment and in less time
period.
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9. Reitz India has set a benchmark to deliver high quality
fans for heavy duty industries which can work at precise
operating conditions like high temperatures and
pressures. Reitz offer idealistic centrifugal fan and
centrifugal blower design that can be used in all large
scale process industries like cement, iron & steel, power
plants, fertilizers/ chemicals and more.
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