Filter Separator & Coalescer

Filtration is the removal of solids from liquids or gasses by flowing the contaminated liquid or gas through a filter media that will retain the solids and will only let clean product pass through.

Fuels, both liquid and gas, are usually travelling through the system once and are consumed at the end of the line. Since the process stream carries new contamination on a continues basis the amount of solids to be removed can be much higher than in any hydraulic system. The requirements for cleanliness of fuels are part of the fuel specifications and these specifications are met using nominal filtration. (Hydraulic and lubricating oils, which are circulated again and again through the same equipment, require absolute filtration for the best performance of the equipment).

The purpose of the filtration is the protection of the system components further downstream in the system, such as injection pumps, injection nozzles and other engine parts. The contamination consists among others of sand, pipe scale and dust, and are originated from the production process, the transport and the storage.

If liquid fuels are contaminated with water, or gas fuels are contaminated with liquids, the fuel can be treated with a filter water separator or monitor.


The vertical and horizontal two stage liquid filter water separators are specially designed for the removal of free and emulsified water from (aviation) gasoline, jet fuel, diesel fuel, gas oil and other light hydrocarbon products. A two stage filter separator should be used where the highest degree of water removal is required. It also serves as a filter for rust particles and muck from the products, thus delivering a clean, dry fuel into the discharge line. It does so by coalescing the fine droplets of water found in the emulsified state and separating these from the product stream. The process of coalescing is accomplished by flowing the continuous phase of the product through a coalescer media, which has an infinite number of irregular passages of very small diameters. By impingement the emulsion is broken into minute particles of water and as these particles progress through the entire depth of the media, they are coalesced into droplet size.

Due to the extremely small diameter of the irregular continuous passages of the coalescing media, an accessory function of this media becomes one of filtering solid particles.

Liquid/Liquid Filter Separartor

As the product stream flows to the separator outlet, the droplets of water which leave the coalescing media are removed by two methods. One is by utilising the common force of gravity and the coalesced droplets are deposited into the water sump. Furthermore the product stream flows through a separator stage. The separator is provided with a hydrophobic membrane to repel the very fine droplets of water. This second stage media used for repelling droplets of water, also functions as a very efficient back-up or secondary filter element, thereby giving double protection against the transfer of solid contaminant through the separator/filter unit.

Innovative Gas Coalescer

Innovative concept in gas coalescing technology which provides the solids loading capabilities of a filter-separator with the liquid removal efficiency of a vertical coalescer. It can effectively handle higher inlet solid and liquid loads versus conventional coalescing equipment and is designed to remove a wide range of liquid contaminants such as lubricating oils, low surface tension liquids, and aerosol mists.

Two stages of coalescing and separation are contained in a single, easily replaceable cartridge. Eliminating the need for a conventional 2nd stage mist extraction device, such as a vane or cyclotube, means no concerns of plugging, or corrosion.

Gas Filter Separator

The cartridge seats inside the housing via a riser tube with the use of a chevron seal.  The seal provides a separation of the cartridge so that gas entering the housing will flow from outside-to-inside through the front of the cartridge (1st stage) where solids are removed and coalescing is begun.  Once past the chevron seal, the gas will flow inside-to-outside through the back of the cartridge (2nd stage) providing a smooth transition of coalesced liquids from the 1st stage into the 2nd stage. Keeping in mind the importance today’s customer places on minimizing operation and maintenance costs, simple, quick and trouble free operation has been incorporated into the element design.

Gas Coalescer
  • Horizontal configuration
  • Two-stage unit utilizing a single technology cartridge in both stages.
  • Delivers combined function of a filter-separator and vertical coalescer by delivering high contaminant loading and coalescing down to 0.3 microns
  • 28X more liquid capacity and 7X greater solids capacity than a vertical coalescer.
  • 100% turndown
  • User friendly design
  • 6” – 84” diameter; custom designs.