FAQ - Frequently asked questions

Q: How do I handle consumed filters?

A: That depends on what the filters have been used to and to local regulations for your community or country.

If the filter is classified as hazardous waste, local regulations for your community will decide what to do. If the goods is classified as waste it can be burnt.

In Lidköping, Sweden, consumed filters, used within the electronics industry, are looked upon as combustible waste, if it does not contain heavy metals. Consumed filters belongs to code 15 02 00 according to the Environmental Code.


Q: How can you tell if the filter system filtrates exactly the gases you want to eliminate?

A: FT's filter system is equipped with a broad spectra gas filter as standard, which theoretically can eliminate gas corresponding to 25 % of the weight of the filter substance. The gases you can eliminate are gases with a molecule weight >40 g/Mol and a boiling point > +/- 0 °C.


Q: Is the separation degree guaranteed for both particles and gases?

A: In general, most fume extraction systems today have a good purification of the particles in the fume. However, do not forget the importance of having a filter that purifies also the gases, such as aldehydes, with a high separation degree. You should demand to receive a certificate for the function of the filter and we believe that the test of the filter should be done by a third party, i.e. an authorized test institute.


Q: What happens with the air curtain when you are working with hands/arms in the CBC-A?

A: The CBC-A cabinet is tested, and the result shows a maximum leakage <5 %, which is similar to a fume cabinet.


Q: How do I choose the right type of nozzle to an extraction arm?

A: The ambition is to create a suction power which exceeds gas diffusion and thermo dynamic air movements to avoid the process air moving in the premises. A rule of thumb is to have > 0,5 m/sec towards the nozzle where the pollutions arise. In practise it is ergonomics and size of the printed circuit cards which decide the choice of nozzle.


Q: What is the optimal capacity in an extraction arm for use at a bench top?

A: The capacity should be 50-70 m3/h. If too high the noise from the suction nozzle can be unpleasantly. When using the suction nozzle in the right way the air flow 50-70 m3/h is big enough to be able to catch the gases and particles that arise at working spots at for e.g. soldering, glueing and washing processes.


Q: Which length of the hose is recommended between the filter unit and the extraction arm?

A: We recommend maximum 2 metres. This is based upon the fact that service and handling cause limits. Theoretically you can use 10 m hose but the suction capacity turns lower.


Q: How shall the nozzle be placed to achieve best function?

A: Towards the bench top and as close as possible to the polluting object.


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