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Nexis® A Series Filter Cartridges for Ink Jet Ink Formulation

Overview
Performance
Additional Information
Ordering Information
BROCHURE
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High Performance, Absolute-Rated Depth Filter for Ink Jet Ink Filtration

The Pall® Nexis A filter cartridge is a high performance depth filter and an essential part of many ink jet ink formulation applications. This all-polypropylene filter features proprietary CoLD (Co-located Large Diameter) fiber technology to enhance the filters’ strength and resist contaminant unloading. In addition, this filter has been optimized with a graded pore structure for outstanding dirt holding capacity and long service life.

Pall Nexis A filters are an ideal choice for a wide variety of ink jet ink formulation applications, including solvent, aqueous and UV curable ink jet formulations.

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

Features and Benefits:

  • Pall NEXIS A Series filters are high efficiency depth filters with all-polypropylene construction.Four nominal filter lengths are available: 254 mm/10 in., 508 mm/20 in., 762 mm/30 in., and 1016 mm/40 in.
  • Pall NEXIS A filters for ink jet ink formulation filtration are available in key removal ratings from 0.5 to 10 µm absolute (coarser grades are available for other applications).
Features Advantages Benefits
All-polypropylene   construction Excellent compatibility with   most ink systems One filter can be utilized   across a wide range of   ink families
Continuous gradient pore   structure Prefiltration section and final filtration capability in   one filter Longer service life and   lower cost per gallon   for filtration
Proprietary CoLD fiber technology Enhanced filter structural   strength Resist contaminant unloading even at high differential pressures
Free of adhesives, binders, resins and silicone Very low extractables in   most ink jet systems Filter will not impact critical ink properties
Absolute rated at >99.9% efficiency High efficiency contaminant   removal, even at finer levels  Excellent protection of   downstream final filter
Wide array of sizes and   configurations available Can be used in a variety of   filter housings and applications Easily retrofitted into current systems and flexible   for future expansion 
Microprocessor-controlled,   continuous manufacturing   process Maximum filter consistency   from lot-to-lot Ink will meet quality criteria on a consistent basis

Graded Pore Structure Micrographs of Nexis Series Filter Cartridges (magnification x 75)

Outer Pre-Filtration Zones

Intermediate Pre-Filtration Zones

Intermediate Pre-Filtration
Zones with CoLD fibers

Final Filtration Zone: Micro-Thin
Fibers interwoven with CoLD fibers

Products in this datasheet may be covered by one or more patents, including EP 830,191; US 5,591,335; US 5,653,833; US 5,681,469; US 5,690,782; US 5,730,820; US 5,733,581; US 5,741,395; US 5,783,011.

Performance

Typical Liquid Flow Rate
versus Differential Pressure

3 Flow rate is per 10 in. / 254 mm. For liquids with viscosities differing from water, multiply the pressure drop by the viscosity in centipoise (cP).

Additional Information

Materials of Construction

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

Operating Conditions2

Maximum operating differential pressures and temperatures in compatible fluids:

Operating Temperature Maximum Differential Pressure
86 °F/30 °C 60 psid/4.1 bard
150 °F/66 °C 25 psid/1.7 bard
180 °F/82 °C 15 psid/1.0 bard

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

Ordering Information

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

Table 1

Code Absolute Removal Rating4
0.5 <0.5 µm
1 0.95 µm
3 2.8 µm
5 4.1 µm
10 9.5 µm

4 Based on >99.9% Retention Rating by ASTM F-795 Test

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 End Configuration
No Code Double Open
End (DOE) Industrial
(no endcaps)
H21 DOE, 'Santoprene'
Gasket Seal Endcaps
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 5

Code Gasket/O-ring Material
No Code None
E EPDM (standard)
V 'Viton' A
N Buna N

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