3M MICRO-KLEAN RP Specifications

Micro-Klean
RP Series

All-polypropylene Rigid Graded Porosity Cartridge Filters

Cleaner, Faster Flowing, Longer Lasting -

advancing depth filtration through technological innovation. 3M Purification
Inc. Micro-Klean™ RP Series filters are manufactured using proprietary rigid
extrusion bonded technology. These all-polypropylene depth filter cartridges offer
premium benefits compared to competitive filters. These benefits include:

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Increased surface area for extended filter life

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Low initial pressure drop for enhanced flow

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High particle removal efficiencies at high flow rates (flux)

The filter’s extended service life results in fewer filter change-outs, while its
enhanced flow characteristics can typically reduce the number of filters required
to achieve a given flow rate. These combined features of Micro-Klean RP Series

filters can significantly reduce total filtration cost.

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Features & Benefi ts

Advanced graded porosity design

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Longer service life

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Fewer fi lter change-outs

Rigid depth fi lter construction

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Helps protect against unloading of particles during service life

Grooved cartridge with extended surface area

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Promotes fuller utilization of the depth-matrix

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Longer fi lter life

All-polypropylene construction

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Compatibility in a wide range of applications and operating conditions

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Cleaner design with no adhesives, binders, surfactants, or lubricants

Materials of construction listed in FDA 21 CFR

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Complies with regulations for food & beverage contact

Core-less fi lter structure

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Ease of disposal

Continuous integral length fi lter element (up to 40” length)

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No bond joints to break

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Easy to install

Applications

Micro-Klean RP Series fi lters are suitable for a
wide range of particle control and equipment
protection applications in the Food & Beverage
and Pharmaceutical industries. 3M Purifi cation
recommends testing under actual application
conditions to determine the right product and
retention rating.

Beverages Bottled Water, Ready-to-

Drink Beverages, Dairy
Products, Juices, Soft Drinks,
Process & Blending Water

Pharmaceuticals Pre-Reverse Osmosis, Bulk

Chemicals, Rinse Water,
Active Pharmaceutical Ingre­dients

The unique manufacturing process of Micro-Klean RP Series filters
combines superior process control with the quality assurance of an
ISO-certified quality system to provide consistent product per­formance. This exclusive manufacturing process provides a high
degree of fiber-to-fiber thermal bonding, without the use of bind­ers, to produce a rigid, core-less, filter structure with the following
properties:

◊ Does not unload contaminants as differential pressure

increases; a performance f law in meltblown filters

◊ Allows grooves to be machined into the upstream surface,

without tearing or melting the filter structure, providing
more than double the effective surface area

◊ Exhibits exceptionally low differential pressure for a given

filter rating

Consistent filtration throughout the service life of a depth-style filter
depends on how well the filter’s structure tolerates fluctuations in
operating conditions - including contaminant loading and differen­tial pressure.

Flexible structures, such as those found in meltblown and string-wound filters, tend to compress and change porosity with increased
pressure, while rigid structures do not (see photo, “Compressible vs. Rigid Structures @ 35 psid”). Media compression can result in
short filter life because the pores collapse and ultimately close. Media compression can also cause the filter to release already held par­ticles. The robust Micro-Klean RP filter captures and retains contaminant within its rigid filter matrix, even under increasing differen­tial pressure.

In addition to enhanced filtration efficiency and contaminant retention over the service life of the Micro-Klean RP filter, the unique
depth filter structure provides greater flow at a given pressure. The Micro-Klean RP filter is self-supporting, unlike soft meltblown and
wound filters that require core support, and is grooved to provide greater than twice the surface area. The increase in surface area pre­vents premature blinding of the outer surface by large particles and gels and promotes fuller utilization of the depth-matrix. The result is
significantly longer life than competitive cartridges.

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Ungrooved

Surface

Grooved

FLUIDFLUID FLUID

Surface

Original

Micro-Klean III

Grooved

Micro-Klean RP

Graded Porosity

Micro-Klean RP Series filters use a graded porosity design that
effectively traps larger particles toward the outer diameter of the
filter structure and progressively smaller particles toward the
inner diameter of the filter. This allows for even particle loading
throughout the depth of the filter and helps to maximum filter
service life.

Surface

New

Micro-Klean

™

RP Series

All-polypropylene Rigid Graded Porosity Cartridge Filters

Increased Surface Area

The Micro-Klean RP Series filter is designed with
deeper and more numerous grooves compared to the

standard Micro-Klean Series filters, resulting in 34%
more surface area. Compared to a conventional un­grooved filter, the surface area increase is 140%. This
new design results in greater capacity and longer service
life, driving down operating costs.

Increased Capacity

When compared to conventional polypropylene “melt
blown” and string-wound filters, Micro-Klean RP Series
filters exhibit significantly greater particle capacity. In
the graph at left, the capacity of the five micron nomi­nally rated Micro-Klean RP Series filter was tested
against comparably rated melt-blown and string-wound
filters. The test was conducted using standardized test
dust at a common concentration and flow rate. The test
was concluded when the pressure drop reached 35 psid
and the total captured particle weight per filter type was
determined. As the graph shows, the Micro-Klean RP
Series offers significantly greater capacity, resulting in
longer filter service life.

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