FAQ – NESS FF300 / FF500

Fine filter station FF300 / FF500 for removing of contamination in thermal oil

In this FAQ-area, you can read some general questions and answers around the FF300 / FF500 of the NESS Fine filter stations, which advantage you can take of it, and what you generally should consider for integration. In addition, it has to do with the infrastructure that should be given for successful operation.

What do the NESS Fine filter stations do?

The NESS fine filter station is a product in the NESSessities concept which constantly increases safety, availability, durability and efficiency in thermal oil systems. One of the 3 most important factors for a good quality is a low Conradson value. The NESS Fine filter station helps you ensuring this permanently.

Besides acid figure and flashpoint, the
Conradson value is an important factor for good oil quality

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How do I integrate the NESS Fine filter station in my system?

No problem at all! Like all NESSessities, also the NESS Fine filter station is part of the modular concept. As it applies to many other NESSessities, the fine filter station can be retrofitted in each system. Existing processes are not influenced. because the fine filter station filters in the bypass flow. This concept allows the relatively easy retrofitting also for already existing systems.

NESSessities work independently
in the bypass flow of the system

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Are there different fine filter stations available? And if yes, do we have to consider something?

Generally, NESS is offering two sizes of systems for the filtration in thermal oil systems. However, their functions do not distinguish in principle. If selecting the right size, beside the actual oil volume of the system, the pollution factor must be considered also for retrofitting of the system.

FF300Used oil: < 50.000 litres
New oil: < 80.000 litres
FF500Used oil: < 150.000 litres
New oil: < 200.000 litres

What product solutions are available for your system, you will read here

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Do I need additional infrastructure for the operation of the fine filter station?

Beside a certain intake pressure of the thermal oil, of course an adequate power supply is needed for the own pump and the own control unit of the station. Additionally, a washing station or a similar cleaning equipment is recommended for cleaning of the filter baskets.

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Oil is filtered through filter baskets. Are there any differences and what is to be considered?

Depending on the age of the thermal oil system and the heat transfer oil, particles are solved in the oil to a greater or lesser extent. For this reason, for the first filtration we recommend starting with a little wider mesh size (200 µm) of the filter insert – mainly for already running systems. The following mesh sizes / filter basket variants are available:

Mesh size in 15, 90 or 200 μm
Scope of applicationExternal filterInternal filter
First filtration200 μm
Transition filter90 μm
Normal operation90 μm 15 μm

The filter basket for normal operation includes an additional internal filter. We recommend always having a second filter of this variant in store, for instance to be able to insert the second filter while the first filter is being cleaned to avoid standstill during filter cleaning.
Furthermore, each basket can be completed by a temperature-resistant magnetic bar, to better remove iron particles from the heat transfer oil.

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What happens with the filtered deposits in the filter basket and what do we have to observe?

If the filter is full, this is indicated by the fine filter station and the system switches off itself. Now, the filter must be cleaned properly. The filter basket is lifted out of the filter station and in the optimum case, it is cleaned in a cleaning station.

Depending on the filter clogging, also diesel or cold cleaner can be used for cleaning the basket. In this case, use a rim brush for cleaning.

If compressed air or a steam jet are used, please take care not to damage the filter insert. Ultrasonic cleaning in a cleaning or solvent bath is also thinkable.

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Other FAQ topics that might interest you

Deposits in thermal oil systems
What can I do about deposits
and how to proceed best?