Materials of construction
Filter media: Borosilicate micro fiberglass with acrylic binder
Hardware: Polypropylene end caps and outer netting
Support material: Spunbonded polyester
Gaskets: EPDM, fluorocarbon elastomer, nitrile
Sealing: Thermal bond
Dimensions (nominal)
Outside flange diameter: Five flange options are available . Contact Pall for information on sizes.
Outside filter diameter: 15.2 cm (6 in.)
Lengths: Size 1, Size 2, Size 4 - 101.6 cm (40 in.)
Performance Specifications:
Filter grades
1.5, 3, 10, 20, 40 micron (µm)
Maximum operating differential pressure
- to 2.9 bard @ 20°C (42 psid @ 68°F)
- to 1.0 bard @ 79°C (15 psid @ 175°F)
NOTE: Stainless steel flange is recommended for temperatures in excess of 43 °C (110 °F).
Recommended change-out differential pressure1
2.4 bard @ up to 54°C (35 psid @ up to 130°F)
Particle Removal Ratings2 (µm)
Cartridge Designation |
90% Efficiency |
≥ 99.9% Efficiency |
DFNM 1.5 |
0.9 |
1.6 |
DFNM 3 |
1 |
1.9 |
DFNM 10 |
2.8 |
9.3 |
DFNM 20 |
9.5 |
17 |
DFNM 40 |
17 |
37 |
Typical Flow
Filter Grade |
mbard/lpm (psid/gpm) Water @ 20 °C (68 °F) |
Size 1 |
Size 2 |
40 in. |
1.5 |
0.21 -0.011 |
0.09 -0.005 |
0.05 -0.003 |
3 |
0.09 -0.005 |
0.04 -0.002 |
0.02 -0.001 |
10 |
0.06 -0.003 |
0.03 -0.001 |
0.02 -0.001 |
20 |
0.04 -0.002 |
0.02 -0.001 |
0.02 -0.001 |
40 |
0.04 -0.002 |
0.02 -0.001 |
0.02 -0.001 |
NOTE: For kPa, multiply mbard/lpm by 0.1.
1 Provided that the maximum differential pressure is not exceeded based on temperature limits defined above.
2 Marksman DFN series filter cartridge retention ratings are based on Pall’s Dynamic Efficiency test protocol. This single-pass, destructive challenge test is based on ASTM F-795 test procedures for determining the performance of a filter medium. Fine test dust is used as the test contaminant for filters in the 1 to 20 micron range. Coarse test dust is used for micron ratings above 20 microns. Additional information can be obtained by contacting Pall Corporation.