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WATER-FINE Filter Cartridges for Ink Jet Ink Formulation

Overview
Specifications
Performance
Additional Information
Ordering Information
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Long Life Membrane Filtration for Aqueous Ink Jet Inks

The Pall® WATER-FINE filter is a highly asymmetric membrane filter designed for filtration of aqueous fluids, including ink jet inks. The patented polysulfone membrane features a tapered pore structure for high flow rates and long on-stream life.

The WATER-FINE filter is an excellent choice where fine filtration to 0.2μm is required, but with the economy of an industrial filter cartridge. This filter is ideal for final filtration of most office printing ink jet inks and will help assure printer performance.

Reference Pall literature publication 1254-B "Filtration Solutions for Ink Jet Ink Formulation" for specific recommendations.

Features

  • Pall WATER-FINE filters are pleated polysulfone membrane filters with polypropylene hardware.
  • Four nominal filter lengths are available:
    • 254 mm/10 in.
    • 508 mm/20 in.
    • 762 mm/30 in.
    • 1016 mm/40 in.
  • Pall WATER-FINE filters for aqueous ink filtration are available in removal ratings of 0.1 μm, 0.2 μm and 0.45 μm absolute (complimentary grades are available for other applications).
Features Advantages Benefits
  • Filter utilizes a highly asymmetric polysulfone membrane
  • Absolute removal ratings of 0.1 μm, 0.2 μm and 0.45 μm
  • Hydrophilic filter media
  • Ink Jet Specification option
  • Wide array of configurations available
  • Large media effective filter area
  • Upstream section is a prefiltration zone
  • Consistently high efficiency filtration
  • Easily wets out with most aqueous inks
  • Optimized filter media for ink jet ink formulation
  • Can be used in a wide variety of filter housings
  • Low pressure drop
  • Longer service life
  • Meets or exceeds ink quality requirements for thermal ink jet printing
  • No need for prewetting
  • Maximum flow performance and economy of operation
  • Easily retrofitted into current systems and flexible for future expansion
  • High flow rates for fast ink production

Specifications

Materials of Construction

Filter Media Highly Asymmetric Polysulfone Membrane
Core, Cage and Endcaps Polypropylene
Gaskets/O-Rings Ethylene Propylene (EPDM)1

1 Please contact Pall for other available materials

Operating Conditions2

Maximum operating differential pressures and temperatures in compatible fluids:

Operating Temperature Maximum Differential Pressure
68 °F/20 °C 80 psid/5.5 bard
203 °F/95 °C 20 psid/1.4 bard

2 Fluids that do not soften, swell or adversely affect the filter or materials of construction

Performance

Typical Liquid Flow Rate versus Differential Pressure3

3 For liquids with viscosities differing from water, multiply the pressure drop by the viscosity in centipoise (cP)

Additional Information

Typical Media Structure Cross Section Photomicrograph

Ordering Information

This is a guide to part number structure only. For availability of specific options, please consult Pall

W F N [1] [2] [3] [4] [5] [6]

Table 1

Code Absolute Removal Rating4
0.1 0.1 μm
0.2 0.2 μm
0.45 0.45 μm

4 Based on >99.9% Retention Rating by Standard Latex Bead Challenge

Table 2

Code Cartridge Length
10 10 in.
20 20 in.
30 30 in.
40 40 in.

Table 3

Code Hardware
U Polypropylene

Table 4

Code Gasket/O-ring Material
E EPDM (standard)
V 'Viton' A
N Buna N

Table 5

Code End Configuration
No Code Double-Open End (DOE)
M3 SOE, flat closed end, external 222 o-rings
M7 SOE, fin end, external 226 o-rings
M8 SOE, fin end, external 222 o-rings

Table 6

Code Special Ink Jet Specification
147 Preflushed cartridge and Ink Jet optimized media

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