GENERAL

Coalescent cartridge filters are designed to specially separate particles and liquids dragged by gas flow, although they also retain solids.
This kind of filters is specially applied for the protection of regulation and measurement stations, valve stations, gas transfer, etc. They are particularly useful for operations in which liquid or humidity is transported by the gas, thus potentially damaging the installation. They are used, for example, in turbines or air/gas compression units, chemical industry processes, in the food industry, etc. Coalescent cartridges are rechangeable.

WORKING PRINCIPLE

This kind of recipient usually has a deflector installed in its inlet which means gas enters the recipient, it crashes into it and reduces speed, so the biggest particles are deposited by gravity at the bottom. Filtering elements (cartridges) guarantee the separation of liquids dragged by gas flow to obtain maximum efficiency. The gas vein always flows from inside to outside the coalescent element. If there are no solid particles, the change of elements is greatly enlarged. Pressure drop of this kind of filters is
relatively low. Filtering elements are manufactured using micro fibres mixtures
(polypropylenes, nylon, etc.) which form stretches inside their bodies where liquid particles are retained. As these particles get enlarged with others, they flow by gravity to the recipient’s bottom.
There are different kinds of filter according to the desired efficiency. Later we detail these efficiencies to help in the choice of the most suitable element for each service.

VESSEL MATERIALS

The standard materials are carbon steel and stainless steel.

FILTERING CARTRIDGES

Construction materials are the appropriate for the fluid to be filtered and the filtration level wished. They have different dimensions that enable to cover the needs of the process and design the smallest recipient possible.

PRESSURE DROP

The design of this kind of filters normally works with a pressure drops between 0.5 and 2 bar, aprox.