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:

■

Increased surface area for extended filter life

■

Low initial pressure drop for enhanced flow

■

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.

™

Features & Benefi ts

Advanced graded porosity design

■

Longer service life

■

Fewer fi lter change-outs

Rigid depth fi lter construction

■

Helps protect against unloading of particles during service life

Grooved cartridge with extended surface area

■

Promotes fuller utilization of the depth-matrix

■

Longer fi lter life

All-polypropylene construction

■

Compatibility in a wide range of applications and operating conditions

■

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

Materials of construction listed in FDA 21 CFR

■

Complies with regulations for food & beverage contact

Core-less fi lter structure

■

Ease of disposal

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

■

No bond joints to break

■

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.

2

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.

3

Greater Effi ciency

When compared to conventional polypropylene pleated and string­wound filters, Micro-Klean RP Series filters exhibit significantly
greater particle trapping efficiency. In the graph at right, the ef­ficiency of the nominally rated five micron Micro-Klean RP Series
filter was tested against comparably rated pleated and string-wound
filters. The test was conducted using standardized test dust with
particles between 10 and 15 microns at the same concentration and
flow rate. Particle counts were taken upstream and downstream of
the filters and the efficiencies were calculated using the following
formula:

(

x 100

Efficiency % =

Particles upstream - Particles downstream

(

Particles upstream

As the Cartridge Effi ciency graph shows, the Micro-Klean RP series offers
signifi cantly better effi ciency, resulting in superior particle control.

Flow Rates

The unique design and construction of the Micro-Klean RP Series filter allows for significantly lower pressure drop when compared to
competitive elements. The Flow Chart below clearly demonstrates the Micro-Klean RP series flow advantage when compared to other
five micron rated competitive melt-blown and string wound cartridge filters. For a given differential pressure, Micro-Klean RP Series
filters yield flows up to ten times that of competitive filters, a significant advantage when sizing a system for a given process flow rate.
Flow rate advantage translates into lower capital investment for filter housings and fewer cartridges to purchase. As shown in Table 1,
a process with a water flow rate of 180 gpm and a maximum clean pressure drop of 0.5 psid, a Micro-Klean RP Series filter system
requires significantly fewer cartridges and smaller filter vessels (compared to competitive filters) for greatly reduced capital costs.

5.0

GE Osmonics Hytrex filters
Parker Fulflo Honeycomb Wound
PolyPropylene filters

4.0

3.0

2.0

Differential Pressure (psid)

1.0

Pall Claris filters
Micro-Klean™RP Series filters

0.3

0.2

0.1

Table 1. Comparison of 5 Micron Filters in a Water System

30” Filters Re­quired for a 180

Filter

gpm fl ow rate*
with a clean
pressure drop of

0.5 psid

Micro-Klean RP Filters 12 12

Parker Fulflo
Honeycomb™ Wound

Differential Pressure (bar)

Polypropylene Filters

®

29 20

Housing Diameter
(Inches) Required for
30” Double Open End
Filters

0

02 46810

gal/min gal/min gal/min gal/min gal/min gal/min

0 40

L/min L/min L/min L/min L/min

4

10 20 30

Water Flow

0.0

Osmonics Hytrex
Filters

Pall Claris

*Based on the manufacturers’ literature piece specifications as of 6/09

®

®

Filters 24 16

60 30

Micro-Klean
RP Series

Filter System Sizing

To size a system of Micro-Klean RP Series filters, flow vs. differential pressure data is provided in Table 2.

Table 2. Micro-Klean RP Specific Pressure Drop (SPD)

All-polypropylene Rigid Graded Porosity Cartridge Filters

™

Nominal Rating (µm)

50.035 0.637
25 0.018 0.328
50 0.010 0.182

To calculate a filter’s clean pressure drop for Newtonian fluids, use the following formula in conjunction with the Specific Pressure Drop
Values. The Specific Pressure Drop values may be effectively used when three of the four variables (Viscosity, Flow, Differential Pres­sure, and Cartridge Grade) are set. Care must be taken when sizing Micro-Klean RP Series filtration systems. Select a filter housing that
will accept at least the required number of 10-inch filter elements, and ensure that the total system f low does not exceed the maximum
housing flow rating.

Filter Cartridge Specifi cations

Table 3. Micro-Klean RP Filter Specifications

Construction

Filter Media Polypropylene

Operating Conditions

Maximum Operating Temperature 176° F (80°C)

Specific Pressure Drop Per 10” Filter

psid [mbar]
clean

(psid/gpm-Cp)

Total system Viscosity in SPD Value

(

gpm [lpm] CP from Table 2

=

Equivalent number of 10-inch
cartridges within housing

(

(

Specific Pressure Drop per 10” filter

(

(mbar/lpm-Cp)

(

(

Maximum Differential Pressure

Recommended Change-out Differential Pressure 35 psid @ 68°F ( 2.4 bar @ 20°C)

Cartridge Dimensions

Inside Diameter (nominal) 1.1” (28 mm)

Outside Diameter (nominal) 2.6” (66 mm)

Length (nominal) see ordering guide 9.75” - 40” (248 - 1016 mm)

Regulatory

Micro-Klean RP filters meet the requirements of USP for the Biological Test for Plastics, Cla ss VI-70°C.
Materials used in the manufacture of Micro-Klean RP filters meet the requirements of United States FDA 21 CFR for food a nd beverage contact

15 psid @ 176°F (1.0 bar @ 80°C)
25 psid @ 140°F (1.7 bar @ 60°C)
60 psid @ 68°F (4.1 bar @ 20°C)

5

Chemical Compatibility

The 100% polypropylene construction provides excellent chemical compatibility in many demanding process f luid applications. Com­patibility is influenced by process operating conditions. Micro-Klean RP Series cartridges should be tested under actual conditions to
determine compatibility.

Table 4. Fluid Compatibility

Chemical Temperature Chemical Temperature Chemical Temperature

Acetic Acid 20% 160°F (71°C) Hydrogen Peroxide 100°F (38°C) Sodium Carbonate 160°F (71°C)

Bleach 5.5% 120°F (49°C) Nitric Acid 20% 120°F (49°C)

Sulfuric Acid 70%

160 °F (71°C )

Potassium Hy-

droxide

140°F (60°C)

Scientifi c Applications Support Services (SASS)

Dedicated technical support teams comprised of 3M Purification scien­tists and engineers are available to provide application specific recom­mendations for the most effective and economical filtration system. In
addition to comprehensive testing and analyses conducted in advanced
laboratories at 3M Purification, the SASS staff can also perform on site
testing at customer’s facilities. Contact your 3M Purification Distributor
for more information.

Service Worldwide

3M Purification is a U.S. based multinational company with distribution
and manufacturing sites worldwide. Global manufacturing sites together
with trained stocking distributors and state of the art laboratory facilities
bring quality solutions to challenging filtration applications.

Sodium Hydroxide

70%

Sulfuric Acid 20%

160 °F (71°C )

160 °F (71°C )

6

Micro-Klean
RP Series

All-polypropylene Rigid Graded Porosity Cartridge Filters

™

3M Purifi cation Filter Housings

3M Purification manufactures a full line of industry standard filter housings to meet most application requirements. Models are available
for both gas and liquid service in a wide range of construction materials, from plastics to ASME Code with 316L stainless steel, to suit a
variety of application needs. For more information about 3M Purification filter housings, please visit us at www.3Mpurification.com, or
consult your local 3M Purification distributor.

Express Series Housing

• Maximum design fl exibil­ity for a wide variety of
system requirements

• ASME Code

• Choice of carbon steel,
304L or 316L stainless
steel

SS Housing

• Availabile in a variety of
sizes

• Accepts both single &
double open end car­tridges

• 316L stainless steel

CT Series

• Available in a variety of
sizes & materials

• Mounting bracket avail­able

AL Series

• Rugged economical de­sign in cast iron & steel

• Easy assembly

CTG-Klean Filter System

• Enclosed system

• Uses disposable fi lter pack

• Easy-to-use, housing clean-up
minimized

1BD Housing

• Available in cast iron & steel, or
304 stainless steel

• Built-in valve for duplex or single
operation

VC Series

• Polyvinylchloride construction

• Available for 2- or 3-high car­tridges

PC Housings

• Feature a removable cartridge
pack for rapid change-out and easy
cleaning

• ASME code

DC Series

• Available in a wide variety of sizes

• 304L stainless steel construction

• Accepts both DOE & SOE car­tridges

1B Housing

• Available in cast iron & steel, or
304 stainless steel

• Choice of 1- or 2-high cartridge
models

1M Housing

• Lightweight plastic construction

• Choice of 1- or 2-high cartridge
models

1H Housing

• Ideal for high pressure applications

• Durable steel construction

ES Series Housing

The ES series filter housing is a durable high volume filter housing constructed from 316L or 304L stainless steel , or carbon steel. With
a cartridge capacity from 12- to 480- 10 inch filter elements, the ES filter housing can accommodate a wide range of flow requirements.

AL and CT Filter Housings

AL and CT filter housings offer a wide range of sizes from one cartridge to eighteen cartridges.

DC & SS Filter Housings

DC and SS filter housings offer a low cost alternative for low volume filtration. Constructed from reliable 304L stainless steel (Model
DC) or 316L stainless steel (Model SS), these housings are available for a wide range of flow rates and applications.

7

Micro-Klean™ RP Series Ordering Guide

Cartridge

type:

RP Series

RP

Length Grade Material Surface Packaging

09-9 ¾”
10–10”
19–19 ½”
20–20”
29-29 ¼”
30-30 ”
39-39 ”
40-40”

B–5µm
F–25µm
L–50µm

18-Polypropylene

G­Grooved

2-bulk O-none N- none N- none

Ring

Support

End Modi-

fication

Gasket/

O-ring

Important Notice
3M Purifi cation Inc. MAKES NO WARRANTIES, EXPRESS OR IMPLIED, INCLUDING, BUT NOT L IMITED TO, ANY IMPLIED WARRANTY OF MERCHANTABILIT Y OR FITNESS FOR A PART ICULAR PURPOSE .
Since a var iety of factors can affect the use and performance of a 3M Purifi cation Inc. product in a particular application, some of which are uniquely within the user’s knowledge and control, user is
responsible for determining whether or not the 3M Purifi cation product is fi t for a particular purpose and suitable for user’s method of application.

Limited Warranty
3M Purifi cation Inc. warrants it this product to be free from defects in material and workmanship during normal use for a period of one (1) year from the date of shipment from the factory. If the
Product(s) is (are) defective within this warrant y period, your exclusive remedy and 3M Purifi cation Inc.’s sold obligations shall be, at 3M Purifi cation Inc.’s option, to replace or repair the Product(s)
or refund the original purchase price of the Product(s) This warranty does not apply to f ailures that result from abuse, misuse, alternation or damage not caused by 3M Purifi cation Inc. or failure to prop­erly follow installation and use ins tructions.

Limitation of Liability: 3M Purifi cation Inc. will not be liable for any loss or damage arising from the use of the Product(s), whether direct, indirect, special, incidental, or consequential, regardless of the
legal theory asser ted, including warranty, con tract, negligence or str ict liabilit y. Some states do not allow the exclusion or limitation of incidental or consequential damages, so the above limit ation may
not apply to you.

This warranty gives you specifi c legal right s and you may have other rights which vary from state to state, or country to country.

Your Local Distributor:

3M Purification Inc.

400 Research Parkway
Meriden, CT 06450 U.S.A.
[phone]
[phone]
Fax [phone]

www.3Mpurifi cation.com

8

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Micro-Klean is a trademark of 3M Company used under license.
Please recycle. Printed in U.S.A.
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