Filtration Systems/

Coalescing Filter

Coalescing filters are specialized filter media designed to collect and remove oil and other vapors or mists from process air streams. Similar to mist collectors or eliminators, coalescing filtration systems force air or gas through a series of fibrous panels or films. While the air or gaseous material can permeate the tangle, vapors and other particles adsorb or collect on its surface. These fine particulates merge and drain away.

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Precision Filtration Products
Philadelphia, PA
888-679-6645
We aim to serve any filtration needs at Precision Filtration Products, no matter ho difficult the solution may seem. Are you looking for an old or rare filter element? Do you need help designing an entire system? Would you like to customize a coalescing filter to meet your specifications? Feel free to contact us anytime and our friendly customer service team will assist you.
 
Eaton Filtration
Iselin, NJ
800-859-9212
We supply high-quality systems, parts and services, including coalescing filters, to a variety of key markets and are expanding our global footprint with initiatives in the Americas, EMEA and Asia Pacific. Eaton's Filtration business has led the way with technology that meets the growing and rigorous demands of vital industrial sectors. Give us a call today!
 
Filter Specialists Inc.
Michigan City, IN
800-348-3205
An important factor in our competitive edge is that we maintain complete control over the entire manufacturing process: Filter Specialists Incorporated extrudes fiber, needles, spins yarn, mold injects plastic components, sews/welds filter bags and manufactures a complete cartridge line. In addition, we engineer and fabricate ASME-code filter housings and equipment, like coalescing filters.
 
Rosedale Products, Inc.
Ann Arbor, MI
800-821-5373
Over the last 25 years, our engineering achievements at Rosedale Products Inc. have produced an exceptional product line that includes high performance filtration solutions such as coalescing filters for multiple industries. Our combination of technology and industry expertise makes Rosedale the most cost-effective solution available to customers today. Give us a call!
 
SERFILCO®, Ltd.
Northbrook, IL
800-323-5431
At SERFILCO®, our mission is to be a proactive partner with our customers and the industries we serve. To this end, we will continue to develop and manufacture state-of the-art filtering, liquid handling and waste treatment equipment and accessories, such as coalescing filters, to help achieve the product integrity, quality and cost savings to be competitive in the market place.
 
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Coalescing Filter


Common contaminants removed by coalescing filters include condensed water droplets, liquid oil and oil vapor, dust, rust and other ambient air particles. If not removed, these particulates can block valves and passageways, cause seals to swell, corrode piping and result in the overall mechanical failure of pneumatic manufacturing equipment. Predominantly used in compressed air applications, coalescing-type filters are essential to refrigerant, automotive, ventilation, heating and cooling, transportation, pharmaceutical, food processing and natural gas filtration industries. To accommodate the needs of such a variety of industries, coalescing filters are available in sizes as small as 0.18" inside diameter and as large as 22" outside diameter. With efficiencies ranging from 93% to 99.9999% particulate removal at the 0.3 micron range and similar at the 0.01 micron range, filtering systems such as these not only purify process streams, but they also minimize pollution and downstream corrosion as well as operating and maintenance costs while promoting worker health and safety.

The basic design and operation of coalescing filters is similar to various other air filtration systems. The air sample passes through a filter panel or cartridge. These consist of two or more layers of an extremely fine mesh-like substance. The inner capture layer is a coalescing layer, while the outer layer, made of coarser fibers, is used predominantly for drainage. The fine inner layer collects the droplets and vapors before forcing them to the secondary layer where they merge. The growing matter becomes increasingly heavy and is eventually pulled down by gravity. These contaminants are manually or automatically retrieved from the collection bowl located below the coalescing panel. In some applications this byproduct is disposed of while in others it is valuable liquids that are retrieved and therefore it is recycled back into processing to increase throughput. When valuable oils or aerosols are to be collected, a third layer is used in the coalescing filter. An inner layer made of fine materials is positioned between the two outer layers, which trap dust and other solids, ensuring that the coalesced material is itself fairly pure. In any event, coalescing filter panels or cartridges are made up of fibrous materials that form a complex matrix or lattice. Examples include borosilicate microglass, fiberglass, closed cell foam or other durable and chemically resistant latticed materials.