When evaluating a suitable coalescer, certain factors should definitely be considered more closely in the decision. By comparing the Poret® coalescer with conventional synthetic / glass fiber media, clear advantages of Poret® are visible:
|Poret® coalescer||Synthetic/Glassfibre Media|
|Pores remain open-celled
||Synthetic fibres block very fast
|→Highly resistant to hydrolysis for an effective coalescing effect
||→Changing fibre structure in contact with water leads to bypasses
|→Minimum increase of pressure drop
||→Massively increasing pressure drop
|→Washable and reusable
||→Fibres affected by repeated washing
In the following we explain this aspects in more detail.
The pressure differential of synthetic or glass fibre media is increasing massively after a short while whereas the Poret® coalescer media offers an optimum balance of constantly filtration performance and minimum increase in pressure drop over their entire service life. Thereby the pressure differential will increase slowly and remain after while virtually constant.
PORET® removes entrained droplets from inlet air, preventing them from contaminating downstream filters. The physical mechanisms involved can be illustrated using the simple example of fog in ambient air.
Fog is composed of tiny microscopic water droplets approximately 10–40 micrometers (μm) in diameter. As these droplets are collected in the coalescer, they agglomerate and their average size and weight increase. No longer buoyant in air, these larger droplets are separated off downwards by gravity.
The massive problems of glass-fibre media during operation are visible from the photograph above. The structure of the media is quite often collapsing and occurring bypasses, through which particles are easily passing.
Of course glass / synthetic media is theoretically washable. But in praxis washing will damage the media structure which leads to decrease in filter efficiency.