Nexis® A Series Filter Cartridges

Features and Benefits

• Rated at >99.9% efficiency¹ with retention ratings from 0.5 to 120 µm
• Proprietary CoLD Melt™ fiber technology
• Resists contaminant unloading even at high differential pressures
• Micro-denier melt blown filtration fibers
• Media manufactured with a continuous gradient pore structure
• All-polypropylene construction
• Free of adhesives, binders, resins, and silicone
• Proprietary center core for added strength (0.5 - 20 µm)
• Fast rinse-up to 18 Megohm-cm
• Certification of conformance including lot identification

¹>99.9% retention rating by ASTM F-795 test.

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 Specifications

Filter Grades

• 0.5, 1, 3, 5, 10, 20, 30, 40, 50, 70, 90, 120 μm

Maximum Differential Pressure

• 0.5-20 μm:
  • 1.03 bard @ 82 °C (15 psid @ 180 °F)
  • 1.72 bard @ 66 °C (25 psid @ 150 °F)
  • 4.14 bard @ 30 °C (60 psid @ 86 °F)
• 30-120 μm:
  • 1.72 bard @ 60 °C (25 psid @ 140 °F)
  • 3.45 bard @ ambient (50 psid @ ambient)

Recommended Change-Out Differential Pressure²

2.4 bard (35 psid)

Food and Water Contact Use

Please contact Pall Corporation to verify that the product conforms to your national legislation and/or regional regulatory requirements for water and food contact use.

Purity

Nexis A series filter cartridges are free of adhesives, binders, resins, and silicone.

Rinse-up

Rinse-up to 18 Megohm-cm with a minimum of throughput.

Autoclaving

Single-open-end Nexis A series filter cartridges can be autoclaved for 30 minutes at 121 °C (250 °F) under no end load conditions. However, filter cartridges should be allowed to cool to normal system operating temperatures prior to use.

Steam sterilization

Not recommended.

Product Specifications

Materials of Construction

• Filter media: Polypropylene
• Hardware: Polypropylene
• Gaskets/O-rings: Silicone elastomer, EPDM, nitrile, fluorocarbon elastomer, Santoprene³ (DOE only), FEP, FEP encapsulated silicone, FEP encapsulated fluorocarbon elastomer

Dimensions (Nominal)

• Outside diameter: 6.4 cm (2.5 in.)
• Lengths: 10.2 cm (4 in.), 12.7 cm (5 in.), 24.8 cm (9.75 in.), 25.1 cm (9.875 in.), 25.4 cm (10 in.), 49.5 cm (19.5 in.), 50.8 cm (20 in.), 74.3 cm (29.25 in.), 76.2 cm (30 in.), 99.1 cm (39 in.), 100.3 cm (39.5 in.), 102 cm (40 in.)

² Provided that the maximum differential pressure is not exceeded based on temperature limits defined above.
³ Registered trademark of Advanced Elastomer Systems.

Particle Removal Ratings (μm)⁴

Cartridge Designation	99.9% Efficiency	90% Efficiency
NXA 0.5	0.5	<0.5
NXA 1	0.95	0.65
NXA 3	2.8	1.5
NXA 5	4.1	3.4
NXA 10	9.5	4.7
NXA 20	18.5	13
NXA 30	27	18
NXA 40	36	20
NXA 50	46	27
NXA 70	65	42
NXA 90	85	55
NXA 120	105	65

⁴>90% and 99.9% retention ratings by ASTM F-795 test.

 

Typical Flow vs. Differential Pressure for Application Sizing⁵

⁵Flow rate is for a 25.4 cm (10 in) cartridge. For liquids other than water, multiply differential pressure by fluid viscosity (cP).

Unit conversion: 1 bar = 100 kPa

This information is a guide to the part number structure and possible options. For availability of specific options and housing details, please contact Pall.

Part Number = NXA <Filter Grades (µm) Code from Table 1> - <Cartridge Lengths (cm/in.) nominal Code from Table 2> U- <End Configurations Code from Table 3> <Gasket/O-Ring Materials Code from Table 4>
Example Part Number: NXA 0.5 - 4 U- 1X S (See bold references in tables below)

Table 1 - Filter Grades (µm)

Code	Filter Grades (µm)
0.5	0.5
1	1
3	3
5	5
10	10
20	20
30	30
40	40
50	50
70	70
90	90
120	120

Table 2 - Cartridge Lengths (cm/in.) nominal

Code	Cartridge lengths (cm/in.) nominal
4	10.2 / 4
5	12.7 / 5
9.75	24.8 / 9.75
9.875	25.1 / 9.875
10	25.4 / 10
19.5	49.5 / 19.5
20	50.8 / 20
29.25	74.3 / 29.25
30	76.2 / 30
39	99.1 / 39
39.5	100.3 / 39.5
40	102 / 40

Table 3 - End Configurations

Code	End configurations
1X	DOE, 2.54 cm (1 in) extended core
M3	SOE flat closed end, external 222 O-rings (retrofits other manufacturers’ Code 0)6
M3H	SOE large diameter closed end, external 222 O-rings
M4	SOE fin end, external 222 O-rings with locking tabs (silicone and EPDM O-rings only)
M5	DOE, internal 120 O-rings (retrofits 213 O-ring style)6
M6	SOE flat closed end, external 226 O-rings (retrofits other manufacturers’ Code 6)6
M7	SOE fin end, external 226 O-rings (retrofits other manufacturers’ Code 7)6
M8	SOE fin end, external 222 O-rings (retrofits other manufacturers’ Code 5)6
M10	DOE, internal O-rings (fits other manufacturers’ housings)6
M11	SOE flat closed end, internal 120 O-ring (retrofits other manufacturers’ X style)6
M18	SOE flat closed end, external 222 O-ring
M20	SOE with internal O-rings (same as M10), closed end with deep recess
DOE	DOE with elastomer gasket seals and end caps
H21	DOE, Santoprene gasket seal
XK	SOE plastic spring assembly, saw cut end
SI	SOE metal spring/polypropylene cap, saw cut end

Table 4 - Gasket/O-Ring Materials

Code	Gasket/O-ring materials
S	Silicone
N	Nitrile
E	EPDM
V	Fluorocarbon elastomer
T	Expanded PTFE (gaskets) FEP encapsulated silicone (O-rings)
F	FEP encapsulated fluorocarbon elastomer (O-rings)
Y	Santoprene

⁶For details, contact Pall Corporation.