Whys is it worth?:
Maintenance of laminar as devices ensuring the highest possible purity class A, the laminar-flow cabinets require cyclical specialist tests to prove their uninterrupted readiness to clean the air of impurities.Together with impurities, dusts, bacteria, viruses and fungi are removed. This has a direct impact on the safety of work with a given material, purity of the sample and the finished product.
Need for testing:
There are many factors that can lead to the so-called “leakage” of the filter, including the change of seal pressure, mechanical damage caused by the user or external factors.PN-EN IS 14644-2:2005 Part 2 specifies the maximum time between measurements as 24 months. This is also the period that we adopt for the newly-installed filters, further tests should be carried out more frequently – every 12 months.
It is necessary to show that the filter is still able to provide the desired purity class despite the continuing pollution.
Measurement range:
The main parameters that are checked during measurements are:
- air flow velocity
- number of particles of a given size (from 0.3 microns to 5 microns) in m3 of air
We also test:
- HEPA/ULPA filter integrity
- filtration efficiency
- filter foundation tightness
- smoke test
Additionally, we carry out of the relative humidity and temperature test.