String-wound Depth Filter Cartridges

A Long Service Life and High Contaminant Loading Capacity 

Pall’s string-wound depth filters are designed for advanced and efficient particulate removal performance and high contaminant holding capacity. Compared to traditional polypropylene or polyester materials, these filter cartridges use woven media yarn around the core and have high chemical, temperature, and process fluid compatibility. Available with 10+ different medium options these cartridges are also an economical low-cost choice compared to depth and pleated style filters. 

Pleated Filter Cartridges
Pleated Filter Cartridges

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Brand

Duo-Fine®

Industries

Industrial Manufacturing

Availability

In Stock

Duo-Fine® II, Filter Cartridges, Removal Rating 0.2 μm, Length 30 Inches, silicone, SOE fin end external 226 O-rings

Product ID: DFNT0230USM7B334
Unit of Measure
12/EA
Min Order Qty
12
Removal Rating
0.2 µm
Cartridge Length (Imperial)
30 in
Cartridge Length (Metric)
762 mm
Cartridge Length (Metric)
76.2 cm
Gasket / O-Ring Material
Silicone
End Configuration Code
M7
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Duo-Fine®, Filter Cartridges, Removal Rating 3 μm, Length 20 Inches, FluorocarbonElastomer

Product ID: DFPT320EV
Unit of Measure
1/EA
Min Order Qty
1
Removal Rating
3 µm
Cartridge Length (Imperial)
20 in
Cartridge Length (Metric)
508 mm
Cartridge Length (Metric)
50.8 cm
Gasket / O-Ring Material
Fluorocarbon Elastomer
Change Out Differential Pressure
2.4 bard
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Duo-Fine® II, Filter Cartridges, Removal Rating 0.45 μm, Length 10 Inches, Blank - DOE with elastomer gasket seals & end caps

Product ID: DFNT04510UE
Unit of Measure
30/EA
Min Order Qty
30
Removal Rating
0.45 µm
Cartridge Length (Imperial)
10 in
Cartridge Length (Metric)
254 mm
Cartridge Length (Metric)
25.4 cm
End Configuration
Blank - DOE with elastomer gasket seals & end caps
Change Out Differential Pressure
2.4 bard
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Duo-Fine® , Filter Cartridges, Removal Rating 3 μm, Length 30 Inches, Fluorocarbon Elastomer, SOE flat closed end external 222 O-rings

Product ID: DFNT330UVM3
Unit of Measure
12/EA
Min Order Qty
12
Removal Rating
3 µm
End Configuration
SOE flat closed end, external 222 O-rings
Change Out Differential Pressure
2.4 bard

Duo-Fine® II, Filter Cartridges, Removal Rating 0.45 μm, Length 4 Inches

Product ID: DFNT0454UN
Unit of Measure
12/EA
Min Order Qty
12
Removal Rating
0.45 µm
Cartridge Length (Imperial)
4 in
Cartridge Length (Metric)
102 mm
Cartridge Length (Metric)
10.2 cm
Gasket / O-Ring Material
Nitrile
End Configuration
Blank - DOE with elastomer gasket seals & end caps
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Duo-Fine® II, Filter Cartridges, Removal Rating 3 μm, Length 40 Inches, Nitrile, SOE flat closed end external 222 O-rings

Product ID: DFNT340UNM3
Unit of Measure
12/EA
Min Order Qty
12
Removal Rating
3 µm
End Configuration
SOE flat closed end, external 222 O-rings
Change Out Differential Pressure
2.4 bard

Duo-Fine® II, Filter Cartridges, Removal Rating 0.45 μm, Length 30 Inches, silicone, SOE flat closed end external 222 O-rings

Product ID: DFNT04530USM3B334
Unit of Measure
12/EA
Min Order Qty
12
Removal Rating
0.45 µm
End Configuration
SOE flat closed end, external 222 O-rings
Change Out Differential Pressure
2.4 bard
Bubble Test Option
100% bubble test

Duo-Fine® II, Filter Cartridges, Removal Rating 0.45 μm, Length 20 Inches, Expanded PTFE gaskets FEP encapsulated silicone Orings, SOE flat closed end external 222 O-rings

Product ID: DFNT04520UTM3
Unit of Measure
12/EA
Min Order Qty
12
Removal Rating
0.45 µm
End Configuration
SOE flat closed end, external 222 O-rings
Change Out Differential Pressure
2.4 bard

Duo-Fine® II, Filter Cartridges, Removal Rating 10 μm, Length 9.75 Inches, Nitrile, Blank - DOE with elastomer gasket seals & end caps

Product ID: DFNT10975UN
Unit of Measure
30/EA
Min Order Qty
30
Removal Rating
10 µm
Cartridge Length (Imperial)
9.75 in
Cartridge Length (Metric)
248 mm
Cartridge Length (Metric)
24.8 cm
Gasket / O-Ring Material
Nitrile
End Configuration
Blank - DOE with elastomer gasket seals & end caps
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Duo-Fine® , Filter Cartridges, Removal Rating 3 μm, Length 20 Inches, Blank - DOE with elastomer gasket seals & end caps

Product ID: DFN320UE
Unit of Measure
12/EA
Min Order Qty
12
Removal Rating
3 µm
Cartridge Length (Imperial)
20 in
Cartridge Length (Metric)
508 mm
Cartridge Length (Metric)
50.8 cm
End Configuration
Blank - DOE with elastomer gasket seals & end caps
Change Out Differential Pressure
2.4 bard
See All Attributes

Duo-Fine® II, Filter Cartridges, Removal Rating 3 μm, Length 30 Inches

Product ID: DFNT330UN
Unit of Measure
12/EA
Min Order Qty
12
Removal Rating
3 µm
Cartridge Length (Imperial)
30 in
Cartridge Length (Metric)
762 mm
Cartridge Length (Metric)
76.2 cm
Gasket / O-Ring Material
Nitrile
End Configuration
Blank - DOE with elastomer gasket seals & end caps
See All Attributes

Duo-Fine® , Filter Cartridges, Removal Rating 10 μm, Length 10 Inches, silicone, SOE flat closed end external 222 O-rings

Product ID: DFN1010USM3
Unit of Measure
30/EA
Min Order Qty
30
Removal Rating
10 µm
End Configuration
SOE flat closed end, external 222 O-rings
Change Out Differential Pressure
2.4 bard
92 Items

Description

String-wound filter cartridges are a type of depth filter cartridge that is made by weaving yarn (cotton, glass fiber, polypropylene, polyester, nylon, and polyphenylene sulfide (PPS))around a core usually of 304 SS or 316 SS. 

Product Highlights:
  • High chemical and temperature compatibility
  • 10+ different medium options 
  • Economical choice

Specifications

Product Attributes Values
String-Wound Filters Filter Medium
  • Bleached cotton
  • Standard cotton
  • Natural cotton
  • Glass fiber
  • Heat purified glass fiber
  • Premium polypropylene
  • Standard polypropylene
  • Rayon
  • Polyester
  • Nylon
  • Acrylic
  • Polyphenylene sulfide (PPS)
  • Polytetrafluoroethylene (fluoropolymer)

Filter Grade Range

 0.5 μm to 350 μm
Length 10.2 cm (4 in.) to 127 cm (50 in.)

Applications/Uses

Pall’s string-wound filter cartridges are used for a variety of applications, including chemicals and polymer, oil and gas, and microelectronics.

Chemicals and Polymer

  • Midstream Process Water 
  • Poly Commodity Raw Material (Fluids)
  • Poly Commodity Intermediates (Fluids)
  • Poly Engineered & Special Raw Material (Fluids)
  • Poly Engineered & Special Intermediate (Fluids)

Oil and Gas

  • Upstream Offshore Boiler Water
  • Upstream Offshore Produced Water
  • Upstream Onshore Produced Water
  • Upstream Onshore Surface Discharged Water
  • Midstream Process Water
  • Upstream Injection Water & SRU

Microelectronics

  • Acid etch systems - including Piranha Etch Solvent Strip applications
  • Most aggressive and/or high temperature acids or solvents

Chemicals

  • Polishing of chemical solutions
  • Bulk industrial chemicals
  • Solvents
  • Acids
  • Bases
  • Monomers
  • Process and cooling water

Magnetic Coatings

  • Audio
  • Video & computer tape
  • Floppy discs
  • Computer hard discs
  • Solvents

Photographic

  • Photo emulsions
  • Chemicals
  • Wash & rinse water

Oil Production

  • Well completion fluids
  • Water flood

Air & Gas

  • Compressed air
  • Instrument air
  • Nitrogen
  • Hydrogen
  • Helium
  • Freon
  • Most corrosive gases

Other

  • Solution mining
  • Deep well disposal
  • Paint
  • Ink & coatings
  • Lubricating oils
  • Electropolishing solutions
  • Plating solutions
  • Pigments & dyes
  • Cleaning fluids
  • Adhesives

FAQs

1. Which are the two series that Pall offers for string-wound filters?

Pall offers string-wound filters in the DFT Classic and Encore Series.

 

2. Why choose Pall’s string-wound depth filters?

Pall’s string-wound depth filters are designed for advanced and efficient particulate removal performance and high contaminant holding capacity. These filter cartridges have high chemical, temperature, and process fluid compatibility compared to traditional polypropylene or polyester materials and come with 10+ different medium options.