3M RW User Manual

™

Micro-Klean
RW Series

Micro-Klean™ RW Series Advanced Cartridge Filter Technology For Optimum RO
Membrane System Protection

3M Purication Inc. has developed a line of lter cartridges, the Micro-Klean™
RW series, specically designed for greater protection of RO membrane systems.
Micro-Klean RW series cartridges, manufactured using 3M Purication’s rigid
extrusion bonded technology, are all-polypropylene depth lters offering the
following premium features:

• Consistent particle reduction efciencies throughout the lter’s life

• Increased surface area for extended lter life

• Low initial pressure drop for enhanced ow

Superior Contaminant Holding Capacity = Longer Service Life = Fewer
Filter Change-outs

3M Purication’s manufacturing process allows grooves to be machined into the
upstream lter surface, without tearing or melting the lter structure, providing for
more than double the effective surface area than non grooved lters. Also, unlike
soft melt blown and string­wound lters that require core
support, the Micro-Klean RW
series lter is self-supporting.
The increase in surface area
prevents premature blinding
of the outer surface by large
particles and promotes fuller
utilization of the depth matrix,
resulting in signicantly longer
life than competitive lters
(see graph).

Life Comparison of Micro-Klean™ RT Series

100

75

RT

™

50

Features & Benefits

Rigid depth filter construction



Reduced possibility of filter unloading at higher

differential pressures



Improved protection of downstream RO membranes

Enhanced contaminant holding capacity



Fewer filter change-outs, reduced manpower

requirements

Core-less filter structure



Ease of disposal via incineration or shredding

All-polypropylene construction



Approved for use in potable water applications

(ANSI/NSF Standard 61 certified)

2.5" outer diameter specification



Fits through mid-plates used in large horizontal filter

housings

Consistent Particle

Percent (%) of Micro-Klean

Series Filter Life

25

Reduction Efficiency =
Improved RO Membrane
Protection

The rigid Micro-Klean
RW series structure resists
deformation, lter by-pass,
compression, and particle
unloading. This allows Micro-Klean RW series lters to achieve excellent ltration
efciency up to a differential pressure of 35 psid while other “exible” competitive
melt blown and string wound lters exhibit signicant drops in reduction efciency
at much lower differential pressures (10 psid).

1

0

Micro-Klean™ RT Series Meltblown 1
Meltblown 2 Wound Filter
Meltblown 3

Lower Initial Differential Pressure = Smaller Filter
Housing Requirements

The unique design and construction of the Micro-Klean™
RW series lter results in signicantly lower pressure drop
when compared to competitive lters. For a given differential
pressure, Micro-Klean RW series lters yield ows up to
ten times that of competitive melt blown and string wound
lters. When sizing a system for a given process ow rate, this
translates into lower capital investment for lter housings and
fewer cartridges to purchase.

Specifically For Use in Pre-RO Systems

Micro-Klean RW series cartridges are specically designed for
use in large industrial lter housings typically used for pre­treatment before RO membrane systems. The outer diameter
specication of 2.5" ensures that lers will comfortably t
through support mid plates frequently used in large horizontal
housings. Micro-Klean RW series cartridges are available
in double open end (DOE) and single open end (SOE)
congurations. The SOE congurations include plastic at end
cap and integral plastic spring cap versions for effective sealing
of the cartridges in the housings.

Micro-Klean RW series lter cartridges are certied to ANSI/
NSF Standard 61 making their use acceptable for use in
probable water systems.

Table 1. – Micro-Klean RW™ Series Filter Specifications*

Construction

Filter Media, End Connectors Polypropylene

Gaskets & O-ring Options Nitrile

Operating Conditions

Maximum Opening Temperature 176 °F (80 °C)

Maximum Differential Pressure 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)

Recommended Change-out Differential

Pressure

Cartridge Dimensions

Inside Diameter (nominal) 1.1" (28 mm)

Outside Diameter (maximum) 2.5" (64 mm)

Length (nominal) see ordering guide 30" - 40" (762 - 1016 mm)

Materials used in the manufacture of Micro-Klean RW series filters meet the requirements
of USFDA 21 CFR for food and beverage contact. Micro-Klean RW series filters have been
certified to ANSI/NSF Standard 61

35 psid @ 68 °F (2.4 bar @ 20 °C)

Regulatory

* For more information on Micro-Klean RT series filter

cartridges, please consult the Micro-Klean R T series

brochure (Literature # LITCPOLYK LN).

Micro-Klean™ RW Series Filter Cartridge Ordering Guide

Ca r tridge Type Length

RW -

Micro-Klean RW

Series

30 - 30 inches

40 - 40 inches

Grade

(Microns)

Y - 1

B - 5

Material Surface Packaging Ring Support End Modification

17 - Polypropylene G - Grooved 2 - Bulk 0 - None

2

This Micro-Klean RT series
series filter is tested and certi­fied by WQA against NSF/ANSI
Standard 61
For Material Requirements Only

NN - None

FD - 222 O-ring (Nitrile) &

Flat Cap

1D - 222 O-ring (Nitrile) &

Spring Cap

RN - Spring Cap