The Coalescer filter has been specially designed to separate water
from hydraulic fluids, diesel and marine diesel oil.
According to VDMA standard sheet 24568, the amount of water in
HE pressure fluids has to be kept below 1000 ppm (0.1 %). HLP
fluids should not contain any free water at all. Free water always
causes turbidity which can be seen by the human eye. Physically,
turbidity is a two-phase mixture (emulsion) in which small droplets
of water are present in the pressure fluid. For this reason, it is advis-
able to carry out a mechanical separation of these water droplets;
this technique is based on the coalescer - principle. The droplets
are collected in various layers and brought together into larger units.
The water drops thus formed are several milimetres in diameter