Nexis® A Series Filter Cartridges
Nexis A filter cartridges are high performance melt blown depth filters ideal for use in rigorous food and beverage clarification and particle removal applications.
Nexis A series high efficiency depth filter cartridges are constructed using an advanced, microprocessor-controlled CoLD Melt™ production process that permits the creation of multiple filtration zones within a single filter cartridge. The multi-zone design produces a gradient pore structure which effectively captures larger particles in the outer sections of the filter cartridge while providing highly efficient and consistent removal of smaller particles in the inner sections.
Interlocking and thermally bonded large diameter support fibers combined with ultra-thin filtration fibers create a rigid filter matrix that withstands dynamic operating conditions. A high internal void volume enables the capture of more contaminant than conventional melt-blown, string wound or molded filter cartridges.
The result is a high performance, low cost of ownership cartridge characterized by robustness in operation, long service life, and excellent removal efficiency
| Features | Benefits |
| Fixed fiber matrix with interlocking, thermally bonded support and filtration fibers |
|
| Micro-thin fibers with continuous graded pore structure provide pre- and fine filtration in the same cartridge |
|
| Proprietary high strength center core | Reliable even under high differential pressure conditions |
| All polypropylene construction without adhesives, binders, resins or silicone | Broad chemical compatibility, suitable for use in a variety of fluids |
Materials of Construction
| Component | Description |
| Filter Medium | Polypropylene |
| Core, Fin End and End Cap | Polypropylene |
| SOE Style Cartridges only | |
| Adaptor | Polypropylene |
| O-Ring Seal | Silicone Elastomer Ethylene Propylene Rubber |
Quality
- Cartridges produced in a controlled environment
- Manufactured within a Quality Management System certified to ISO 9001:2008
Food Contact Compliance
Please refer to the Pall website for a Declaration of Compliance to specific National Legislation and/or Regional Regulatory requirements for food contact use.Technical Information
Operating Characteristics in Compatible Fluids1
| Maximum Differential Pressure2 | Operating Temperature |
| 1.03 bard (15 psid) | 82 °C (180 °F) |
| 1.72 bard (25 psid) | 66 °C (150 °F) |
| 4.14 bard (60 psid) | 30 °C (86 °F) |
1 Fluids which do not swell, soften or adversely affect any of the filter components
2 Recommended change-out differential pressure is 2.4 bard (35 psid), provided the maximum differential pressure (based on temperature) is not exceeded.
Sterilization and Sanitization
- Single open end (SOE) cartridges may be autoclaved for 30 minutes at 121 °C (250 °F) under no end load conditions. Cartridges should be cooled to system operating temperatures prior to use.
- In situ steam sterilization is not recommended.
Flow Rates3
3 Typical initial clean Δp for a 254 mm (10 inch) cartridge, clean water at 20 °C (68 °F).
For liquids with viscosity greater than 1 cp, multiply the Δp by the viscosity.
Figure 1: Cutaway view of a Nexis filter, illustrating unique, proprietary CoLD Melt fiber technology for highly efficient contaminant removal, longer service life, and improved strength
Part Number: NXA [Table 1] [Table 2] U [Table 3] W [Table 4] 480
Example Part Number: NXA1030UM7WS480
See bold reference codes in tables.
Table 1: Removal Rating4
| Code | Description |
| 5 | 5 μm |
| 10 | 10 μm |
| 20 | 20 μm |
| 30 | 30 μm |
4 Nexis A filters provide a removal efficiency of >99.9% at the stated rating in compatible fluids. Particulate removal rating is determined by a single pass test based on ASTM F-795 (see Pall Technical Bulletin 1903-*T, latest revision)
Table 2: Length
| Code | Description |
| DOE Style only: | |
| 10 | 254 mm (10") |
| 20 | 508 mm (20") |
| 295 | 749 mm (29.5") |
| 30 | 762 mm (30") |
| SOE Style only: | |
| 10 | 254 mm (10") |
| 20 | 508 mm (20") |
| 30 | 762 mm (30") |
| 40 | 1016 mm (40") |
Table 3: Adaptor
| Code | Description |
| blank | DOE with no endcaps |
| M3 | SOE - single open end with flat closed end and external 222 O-rings |
| M7 | SOE - single open end with fin end, 2 locking tabs and external 226 O-rings |
| M8 | SOE - single open end with fin end and external 222 O-rings |
Table 4: O-ring Seal Material5
| Code | Description |
| S | Silicone Elastomer |
| E | Ethylene Propylene Rubber |
