Duo-Fine® II Series Filter Cartridges

• Superior Filtration Performance
• More Economical Than Depth Type Cartridges
• Excellent Classifying Filter
• Optional 100% Bubble Point Testing
• Rigid Polypropylene Outer Cage Protects Filter Media in Harsh Operating Environments 
• Available with Extended Core
• Imprinted for Easy Identification
• Excellent Chemical Compatibility
  

Performance Specifications in Compatible Fluids¹

Filter Grades:
0.2, 0.45, 1, 3, 10, 30, 50 micron (µm) (nominally rated)

Maximum Differential Pressure:
75 psid (5.2 bard) @ 68°F (20°C)
40 psid (2.8 bard) @ 150°F (65°C)

Recommended Change Out Differential Pressure²:
35 psid (2.4 bard)

Sterilization:
All Duo-Fine II Series cartridges may be autoclaved for 30 minutes at 250°F (121°C) under no end load conditions.

Product Specifications

Materials of Construction:

Filter Media:
50 µm:	Spunbonded Polyester
All Other Grades:	Borosilicate Microfiberglass with Acrylic Binder
Support Material:	Spunbonded Polyester
Netting:	Polypropylene
Hardware:	Polypropylene
Sealing:	Thermal Bond
Gaskets/O-rings:	Silicone Elastomer, Buna N, Viton3 A, Nordel, FEP Encapsulated Silicone, Expanded PTFE, White Buna N, White Silicone

Dimensions (nominal):

Outside Diameter:	2 3/5" (6.6 cm)
Lengths:	4" (10.2 cm), 9 3/4" (24.8 cm), 10" (25.4 cm), 19 1/2" (49.5 cm), 20" (50.8 cm), 29 1/4" (74.3 cm), 29 1/4" (74.3 cm), 29 1/2" (74.9 cm),  30" (76.2 cm), 39" (99.1 cm), 40" (102 cm)

¹ Compatible fluids are defined as those which do not swell, soften or attack any of the filter components.

 

² Provided that the maximum differential pressure is not exceeded based on temperature limits defined above. 
³ Registered trademark of DuPont Dow Elastomers.

Particle Retention (µm)

	Liquid Service (by ASTM F-795 Test)		Gas Service
Cartridge Designation	90% Efficiency	>99.9% Efficiency	Removal Efficiency By DOP Test
DFNT 0.2	0.2	1	99.999%
DFNT 0.45	0.45	2	99.998%
DFNT 1	1	4	96%
DFNT 3	3	10	-
DFNT 10	10	18	-
DFNT 30	30	45	-
DFNT 50	50	75	-

Liquid removal 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.  

Typical Flow vs. Differential Pressure for Application Sizing

Flow rate is per 10" (25.4 cm) cartridge. For liquids other than water, multiply differential pressure by fluid viscosity (cP).

DFNT  -  U  -   -   (e.g., DFNT 0.2-10UN-M3B-BLK)

Code	Filter Grades
0.2	0.2 µm
0.45	0.45 µm
1	1 µm
3	3 µm
10	10 µm
30	30 µm
50	50 µm

 

Code	Cartridge Lengths (nominal)
4	4"
9.75	9.75"
10	10"
19.5	19.5"
20	20"
29.25	29.25"
30	30"
39	39"
40	40"

 

Code	Gasket/O-ring Materials
S	Silicone
N	Buna N
E	Nordel
V	Viton A
T	FEP Encapsulated Silicone (O-rings)
M	White Silicone
W	White Buna N (gaskets)
X	No O-ring required (M2 style only)
T	Expanded PTFE (gaskets)

 

Code	End Configurations
Blank	DOE with elastomer gasket seals & end caps
1X	DOE 1" (2.54 cm) extended core
M2	SOE flat closed end, fits housings with 020 O-ring post
M3	SOE flat closed end, external 222 O-rings (retrofits other manufacturers’ Code 0)4
M3H	SOE large diameter closed end, external 222 O-rings
M5	DOE, internal 120 O-rings (retrofits 213 O-ring style)4
M6	SOE flat closed end, external 226 O-rings (retrofits other manufacturers’ Code 6)4
M7	SOE fin end, external 226 O-rings (retrofits other manufacturers’ Code 7)4
M8	SOE fin end, external 222 O-rings (retrofits other manufacturers’ Code 5)4
M10	DOE, internal O-rings (fits other manufacturers’ housings)4
M11	SOE flat closed end, internal 120 O-ring (retrofits other manufacturers’ X style)4
M20	SOE, internal O-rings (same as M10), closed end with deep recess

 

Code	Bubble Test Option
Blank	Sample Bubble Tested
B	100% Bubble Test

 

Code	Packaging
Blank	Standard Packaging
-BLK	Bulk Packaging4

⁴ For details, contact Pall.