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. 

Filter Cartridges
Filter Cartridges

Order Products

Gasket / O-Ring Material

Fluorocarbon Elastomer

Duo-Fine®, Filter Cartridges, Removal Rating 3 μm, Length 19.5 Inches, Fluorocarbon Elastomer, Blank - DOE with elastomer gasket seals & end caps

Product ID: DFN3195AV
Unit of Measure
12/EA
Min Order Qty
12
Removal Rating
3 µm
Cartridge Length (Imperial)
19.5 in
Cartridge Length (Metric)
495 mm
Cartridge Length (Metric)
49.5 cm
Gasket / O-Ring Material
Fluorocarbon Elastomer
End Configuration
Blank - DOE with elastomer gasket seals & end caps
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Duo-Fine® , Filter Cartridges, Removal Rating 3 μm, Length 39 Inches, Fluorocarbon Elastomer, Blank - DOE with elastomer gasket seals & end caps

Product ID: DFN339AV
Unit of Measure
12/EA
Min Order Qty
12
Removal Rating
3 µm
Cartridge Length (Imperial)
39 in
Cartridge Length (Metric)
991 mm
Cartridge Length (Metric)
99.1 cm
Gasket / O-Ring Material
Fluorocarbon Elastomer
End Configuration
Blank - DOE with elastomer gasket seals & end caps
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Duo-Fine® , Filter Cartridges, Removal Rating 3 μm, Length 29.25 Inches, Fluorocarbon Elastomer, Blank - DOE with elastomer gasket seals & end caps

Product ID: DFN32925AV
Unit of Measure
12/EA
Min Order Qty
12
Removal Rating
3 µm
Cartridge Length (Imperial)
29.25 in
Cartridge Length (Metric)
743 mm
Cartridge Length (Metric)
74.3 cm
Gasket / O-Ring Material
Fluorocarbon Elastomer
End Configuration
Blank - DOE with elastomer gasket seals & end caps
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Duo-Fine® , Filter Cartridges, Removal Rating 0.2 μm, Length 30 Inches, Fluorocarbon Elastomer, Blank - DOE with elastomer gasket seals & end caps

Product ID: DFNT0230UV
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
Fluorocarbon Elastomer
End Configuration
Blank - DOE with elastomer gasket seals & end caps
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Duo-Fine® II, Filter Cartridges, Removal Rating 0.45 μm, Length 20 Inches, Fluorocarbon Elastomer, SOE flat closed end external 222 O-rings

Product ID: DFNT04520UVM3
Unit of Measure
12/EA
Min Order Qty
12
Removal Rating
0.45 µm
Cartridge Length (Imperial)
20 in
Cartridge Length (Metric)
508 mm
Cartridge Length (Metric)
50.8 cm
Gasket / O-Ring Material
Fluorocarbon Elastomer
End Configuration Code
M3
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Duo-Fine® II, Filter Cartridges, Removal Rating 0.45 μm, Length 10 Inches, Fluorocarbon Elastomer, SOE flat closed end external 222 O-rings

Product ID: DFNT04510UVM3
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
Gasket / O-Ring Material
Fluorocarbon Elastomer
End Configuration Code
M3
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Duo-Fine® II, Filter Cartridges, Removal Rating 10 μm, Length 29.25 Inches, Fluorocarbon Elastomer, Blank - DOE with elastomer gasket seals & end caps

Product ID: DFNT102925UV
Unit of Measure
12/EA
Min Order Qty
12
Removal Rating
10 µm
Cartridge Length (Imperial)
29.25 in
Cartridge Length (Metric)
743 mm
Cartridge Length (Metric)
74.3 cm
Gasket / O-Ring Material
Fluorocarbon Elastomer
End Configuration
Blank - DOE with elastomer gasket seals & end caps
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Duo-Fine® II, Filter Cartridges, Removal Rating 10 μm, Length 30 Inches, Fluorocarbon Elastomer

Product ID: DFNT1030UVM3
Unit of Measure
12/EA
Min Order Qty
12
Removal Rating
10 µm
Cartridge Length (Imperial)
30 in
Cartridge Length (Metric)
762 mm
Cartridge Length (Metric)
76.2 cm
Gasket / O-Ring Material
Fluorocarbon Elastomer
End Configuration Code
M3
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Duo-Fine® II, Filter Cartridges, Removal Rating 10 μm, Length 40 Inches, Fluorocarbon Elastomer

Product ID: DFNT1040UVM18
Unit of Measure
12/EA
Min Order Qty
12
Removal Rating
10 µm
Cartridge Length (Imperial)
40 in
Cartridge Length (Metric)
1016 mm
Cartridge Length (Metric)
101.6 cm
Gasket / O-Ring Material
Fluorocarbon Elastomer
Change Out Differential Pressure
2.4 bard
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Duo-Fine® , Filter Cartridges, Removal Rating 1 μm, Length 20 Inches, Fluorocarbon Elastomer

Product ID: DFNT120UV
Unit of Measure
12/EA
Min Order Qty
12
Removal Rating
1 µm
Cartridge Length (Imperial)
20 in
Cartridge Length (Metric)
508 mm
Cartridge Length (Metric)
50.8 cm
Gasket / O-Ring Material
Fluorocarbon Elastomer
End Configuration
Blank - DOE with elastomer gasket seals & end caps
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Duo-Fine® , Filter Cartridges, Removal Rating 1 μm, Length 30 Inches, Fluorocarbon Elastomer

Product ID: DFNT130UV
Unit of Measure
12/EA
Min Order Qty
12
Removal Rating
1 µm
Cartridge Length (Imperial)
30 in
Cartridge Length (Metric)
762 mm
Cartridge Length (Metric)
76.2 cm
Gasket / O-Ring Material
Fluorocarbon Elastomer
End Configuration
Blank - DOE with elastomer gasket seals & end caps
See All Attributes

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

Product ID: DFNT3030UVM3
Unit of Measure
12/EA
Min Order Qty
12
Removal Rating
30 µm
Cartridge Length (Imperial)
30 in
Cartridge Length (Metric)
762 mm
Cartridge Length (Metric)
76.2 cm
Gasket / O-Ring Material
Fluorocarbon Elastomer
End Configuration Code
M3
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213 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.