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 %":
Nominal Efficiency is a manufacturer defined efficiency and for Eaton filter cartridges nominal rated filter cartridges are typically 70% efficient unless otherwise specified. Therefore, with a new, clean filter cartridge, ≥70% of the particles of the stated retention will be retained by the filter cartridge. As particles become trapped within the filter cartridge media, the open area available decreases and thereby increases the efficiency of the filter cartridge. Nominal rated filter cartridges are usually the relatively inexpensive versions used for non-critical applications. They are also used as "pre-filters" to reduce the loading on the more expensive "absolute" efficiency cartridges.
"Absolute" Efficiency refers to a laboratory defined retention efficiency, often expressed with a Beta value or a Beta Ratio. Most of our filter cartridges have a Beta Ratio Chart expressing their efficiency based upon a stated particle size at the bottom of each filter cartridge webpage and the second page of their corresponding PDF datasheet.
Example: our LOFPLEAT-HF 1.0 micron filter cartridges have a Beta 1000 or 99.90% retention efficiency for particles ≥ 1.0 microns. They are also Beta 100 (99%) efficient for retention of particles ≥ 0.60 microns AND Beta 50 (98%) efficient for retention of particles ≥ 0.30 microns.
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:
Beta 5000 = 4999 particles retained from a total of 5000 ∴4999/5000 = 99.98% efficiency.
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
Filter Cartridge Designs & Applications
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|
|Melt Blown Cartridges:||LOFTREX||X||X||X||X|
|Titanium Porous Metal Cartridges:||LOFMET||X|