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.
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).
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
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 |
| ||
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 |
Earn 10% off* your next order online by leaving a review of this product. Please login to your account to leave a review. We appreciate and value your feedback.
*Subject to Terms and Conditions.
