The most diverse performances are declared for separation systems and percentage indications of up to 99.9999 % are not rare, but only an exact definition can bring about clarification.
Figure 4.3.5.1
These percentage ratings are often referred to on a total weight. If separating performance is stated in relation to particle size, a totally different picture of the separating effect emerges. Fig. 4.3.5.1 shows the different separating systems in comparison with a depth filter element with a separating efficiency of 99% at 3 microns. This diagram shows the areas in which individual filter designs show particular performance strengths. The following tables show the difference in separating performance in numerical values, based on total weight on the one hand and particle size in the compressed air on the other.
Table 4.3.5.1 - Assumed particle weights and distribution| Particle Number | Size | Weight | Total Weight |
|---|
| 50 | 20,0 | 29 | 145.000 |
| 1.750 | 7,5 | 60 | 300.000 |
| 10.700 | 2,0 | 8 | 40.000 |
| 67.500 | 0,75 | 3 | 15.000 |
 80.00 | | | 500.000 |
Table 4.3.5.2 - Separating performance based on particle weight and size| Separated Particles µ | Weight % | Total Weight % |
|---|
| 20,0 | | |
| 7,5 | | |
| 2,0 | | |
| 0,75 | | |
The numerical values indicated in the tables are based on the data from section 1.7.1.
