Engineered Depth Filters

Our unique depth filter elements provide the most “state of the art” axial filtration in the industry with the ability to remove and retain up to 1 gallon of water and not ounces but pounds of contaminants.

This water and contaminant removal ability makes our filter elements ideal for any oil filtration applications, especially for those that rely on precision and high reliability.

Our filters come in various medias and flow depths so for virtually any type of fluid, you can achieve your desired cleanliness level. The more dense the media and the deeper the flow path, the higher the efficiency rating will be.

To determine the best filter for your application, you need to know the type and viscosity of the fluid you are filtering and the desired cleanliness.

 

Filter Media	Como Filter #	Uses	Micron Level	Flow Depths	Capabilities
#1 & 1A	6514, 6516, 6518	Water and water-based liquids such as water glycol hydraulic fluids and machine tool coolants	1-10	2-5 in	Excellent dirt removal
#2	6522, 6524, 6526	Light viscosity fluids such as solvents, kerosene, gasoline, diesel fuel	1-5	3-5 in	Excellent water removal
#3	6532, 6534, 6534-X, 6536, 6536-X	Hydraulic oil, viscosities from 100-500 SUS at 100°F	1-10	3-10 in	Most efficient media, water removal
#4	6542, 6544, 6544-X, 6544, 6546-X, 6548	Lube oils such as engine oil, gear oil with temps less than 270°F, machine tool cutting oils, quench oils	5-10	2-10 in	Contaminant and water removal
#5	6552, 6554, 6556, 6558	Water and water-based liquids such as HWB hydraulic fluids, rinse water, cooling tower water	1-10	2-5 in	Contaminant and water removal
#6	6564, 6564-X, 6566, 6566-X, 6568, 6568-X	Very thick and very contaminated oils such as gear oil, die lube oil	10-30		Very low delta-P

What is Depth Filtration?

Depth Filtration is one of the most efficient methods of filtration since the fluid is filtered throughout the axial length of the media rather than just on the surface of the media. The integrity of the filter element is maintained even as it loads up with contamination and the delta-P (pressure across the filter) goes up.

The hydraulic pressure of the fluid compresses the layers of media together and prevents a channel from forming that could allow unfiltered fluid to pass through the element. There are several numerous advantages over standard filters including:

Dirt-Holding Capacity

In typical oil filtration applications, depth filter elements have dirt-holding capacities of several pounds.

Water Absorbency

Depth filters have excellent water absorption qualities; in many applications, they can absorb enough water to keep water contamination in oil to 30 ppm or below.

Beta Ratio

Filtration beta ratios are a measure of the filtration efficiency for particles of all different sizes. Beta ratios are standardized, allowing you to compare filtration performance from one filter to another. However, when using beta ratios to compare filter performance, you must take into consideration the differences between standard filters and depth filters. Standard filters often have high beta ratios; however, they quickly load with contaminant, causing a spike in differential pressure which leads to short element life. On the other hand, depth filters have both high beta ratios and larger dirt holding capacities, which allows for continued performance over a longer period.

Flow Rate

The recommended flow rate will vary based on the viscosity, temperature, and cleanliness level of the fluid being filtered. In most applications, a slower rather than faster rate yields the best results. Selecting a combination of filters and flow rates to yield startup-pressures in the 15-30 psi range will result in maximum filter life.

*Ultimate dirt and water holding-capacity changes based upon specific applications, individual results may vary.

COMO 6534 Filter Element

The 6534 filter element is one of our most popular filter elements. It is constructed of cellulose, making it ideal for hydraulic filtration systems, especially for dirt and moisture intolerant servo, precision, and high-reliability hydraulic systems.

The 6534 filter has a nominal filtration rating of 1 micron. Typical applications would involve oils with a viscosity ranging from 30 to 100 cSt at temperatures up to 270 °F.

Dirt-Holding Capacity

In typical oil filtration applications, the Como 6534 element has dirt-holding capacities of several pounds.

Water Absorbency

The COMO 6534 filter element has excellent water absorption qualities, and can keep water contamination to 30 ppm or below*. In most applications, the COMO 6534 filter element can remove and retain up to two quarts (½ gallon) of water over its lifetime—and up to one gallon, under the right circumstances*.

Flow Rate

The recommended flow rate for the COMO 6534 filter element is 2.5 GPM in light hydraulic oil. In heavier oils, flow may be 0.5-1.5 GPM. In very light oils, such as fuel oils, the filter may be used at flow rates as high as 5 GPM.

*Contaminant and water holding-capacity changes based upon specific applications, individual results may vary.