Duo-Fine® II Series Filter Cartridges product photo Primary L

Duo-Fine® II Series Filter Cartridges

Designed to Provide Efficient Particle Removal in Liquid or Gas Systems

  • 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


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Description

Designed to Provide Efficient Particle Removal in Liquid or Gas Systems

  • 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
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, nitrile, fluorocarbon elastomer, hydrocarbon rubber, FEP
encapsulated silicone, expanded PTFE, white nitrile, white silicone

Dimensions (nominal)

Outside diameter 6.6 cm (2.6 in)
Lengths: 10.2 cm (4 in), 24.8 cm (9.75 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), 101.6 cm (40 in)
Performance

Performance Specifications1

Filter grades

0.2, 0.45, 1, 3, 10, 30, 50 μm

Recommended change-out differential pressure2

2.4 bard (35 psid)

Maximum Differential Pressure

4.8 bard (70 psid) @ 20 °C (68 °F)
2.8 bard (40 psid) @ 65 °C (150 °F)

Sterilization

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

Particle Retention (μm)

 
  Liquid Service Gas 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

Typical Flow vs. Differential Pressure for Application

Unit conversion: 1 bar = 100 kPa

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


1 WIth compatible fluids that 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.
Type
Cartridges and Elements
Use
Filtration
Ordering Information

Pall Part Number = DFNT [1] - [2] U [3] - [4] [5] - [6]

Table 1

Code Filter grades (μm)
0.2 0.2
0.45 0.45
1 1
3 3
10 10
30 30
50 50
 

Table 2

Code Cartridge lengths (cm/ in) nominal
4 10.2/4
9.75 24.8/9.75
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
40 101.6/40
 

Table 3

Code Gasket/O-ring materials
S Silicone
N Nitrile
E Hydrocarbon rubber
V Fluorocarbon elastomer
T FEP encapsulated silicone (O-rings)
M White silicone
W White nitrile (gaskets)
X No O-ring required (M2 style only)
T Expanded PTFE (gaskets)
 

Table 4

Code End configurations
Blank DOE with elastomer gasket seals and end caps
1X DOE 2.54 cm (1 in) 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)3
M3H SOE large diameter closed end external
222 O-rings
M5 DOE, internal 120 O-rings (retrofits 213 O-ring
style)3
M6 SOE flat closed end, external 226 O-rings
(retrofits other manufacturers’ Code 6)3
M7 SOE fin end, external 226 O-rings (retrofits other manufacturers’ Code 7)3
M8 SOE fin end, external 222 O-rings (retrofits other manufacturers’ Code 5)3
M10 DOE, internal O-rings (fits other manufacturers’ housings)3
M11 SOE flat closed end, internal 120 O-ring (retrofits other manufacturers’ X style)3
M20 SOE with internal O-rings (same as M10), closed end with deep recess
 

Table 5

Code Bubble test option
Blank Sample bubble
tested
B 100% bubble test
 

Table 6

Code Packaging
Blank Standard
packaging
-BLK Bulk packaging3
 

3 For details, contact Pall Corporation.
Application
Midstream Process Water, Upstream Injection Water & SRU, Upstream Offshore Boiler Water, Upstream Offshore Produced Water, Upstream Onshore Produced Water, Upstream Onshore Surface Discharged Water
Segment
Midstream
Upstream