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Filter Cartridge Information

Filter Cartridge Retention

Retention is expressed in microns (μm); 1 micron = 1/1000 (0.001) millimeters.

 

Filter Cartridge Efficiency

Eaton filter cartridges are offered in two efficiencies, "nominal" and "absolute %":

 

 

Beta Ratio is established via laboratory testing and is the number of particles up-steam divided by the number of particles down stream for the targeted particle size. Therefore a Beta ratio of 5000 means that for every particle of a given size that bypasses the filter cartridge, there were 4999 that did not. The math follows:

 

 

The testing used for the Beta Ratios we refer to are based upon a "single-pass test method" using ambient water at a flow rate of 2.5 GPM for a 10" length cartridge.  The type of particles used during testing were latex beads and special "coarse and fine test dust" (imagine that, "test dust"!). The removal efficiencies were determined using multiple laser particle counters - the most sophisticated and effective method of counting "dust".

 

The actual efficiency for your application will differ due to operating conditions such as pressure fluctuations, differences in temperature and viscosity.

 

It is important not to confuse filtration efficiency with particle retention capacity; they are unrelated.  The total volume of particles that can be retained within a cartridge and how the rate of increase in efficiency due to reduction of the open area available are not reflected in the Beta Ratio and testing.

 

Much of the performance advantages we offer are based upon the technology and design of the filter cartridge to provide higher volume of particle retention at relatively low differential pressures without sacrificing retention efficiency.

 

Filter Cartridge SizesWe offer the four most common "industry standard" filter cartridge sizes, referred to by their nominal length of 10", 20", 30" and 40"; sometimes slightly shortened versions are required and that's not an issue, it does not affect pricing.  Often 20"+ sizes consist of multiple 10" cartridges.  We can offer custom length cartridges, just let us know what you need by lengths. When in doubt, please contact us.

 

Filter Cartridge Designs & Applications

There are over (20) Eaton Filter cartridges designs, many were designed for a specific type of application.  These (20) cartridges are comprised of (5) categories, following is a quick reference chart for common application categories.

 

TYPE SERIES Ultrapure Water DI Water RO pre-Filter Acids & Bases Beverages Pharmaceutical Cosmetics Lubricants and Coatings
Membrane Cartridges: LOFMEM X X   X X    
Pleated Cartridges: LOFPLEAT     X   X X X  
Melt Blown Cartridges: LOFTREX     X   X X X  
Rigid Resin Bonded Cartridges: LOFCLEAN               X
Titanium Porous Metal Cartridges: LOFMET       X