Plate pack scheme

This kind of internal is commonly used to separate a liquid-liquid mix exploiting the different densities of the two liquids. They are often used in many three-phase separators where the flow is composed by gaseous phase, heavy liquid phase (ex. water) and light liquid phase (ex.: oil).


The plate pack coalescer is composed by canals between long parallel plates at a fixed angle. Passing through this canals with correct velocity is possible to obtain the separation of the light phase(for ex. oil) and the heavy phase (for example water). At the exit of the pack the light liquid is placed above the heavy phase and can be separated using a weir (see the scheme).

plate pack 2 1
plate pack drawing 1
plate pack 1 3
Two samples in our workshop and a rendering of different models of calming baffle
Comparing with a common gravity separator the main advantagies are:
- smaller separated droplets with higher efficiency of separation process
- reduction of the dimensions of the vessel because with this coalescer is possible to obtain the same separation in a shorter space
- decreasing of residence time in the vessel with an important increasing of the production.