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. 

String-wound Cartridge Filters

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Brand

DFT Classic®

DFT Classic®, Filter Cartridges, Removal Rating 25 μm, Polypropylene, Length 40 Inches product photo

DFT Classic®, Filter Cartridges, Removal Rating 25 μm, Polypropylene, Length 40 Inches

Product ID: P025AW40A
Unit of Measure
10/EA
Min Order Qty
10
Packaging
Bulk
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P150A10U product photo

P150A10U

Product ID: P150A10U
Unit of Measure
30/EA
Min Order Qty
30
Packaging
Bulk
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PERMI-L 70-RT-A-S 569 product photo

PERMI-L 70-RT-A-S 569

Product ID: PERMIL70RTAS569
Unit of Measure
110/EA
Min Order Qty
110
Packaging
Bulk
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PERMI-L 57-U-A-R 624 product photo

PERMI-L 57-U-A-R 624

Product ID: PERMIL57UAR624
Unit of Measure
272/EA
Min Order Qty
272
Packaging
Bulk
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PERMI-L 57-U-A-SM product photo

PERMI-L 57-U-A-SM

Product ID: PERMIL57UASM
Unit of Measure
272/EA
Min Order Qty
272
Packaging
Bulk
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PERMI-L 7.68-U-VENT-P product photo

PERMI-L 7.68-U-VENT-P

Product ID: PERMIL768UVENTP
Unit of Measure
1/EA
Min Order Qty
1
Packaging
Bulk
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PERMI-L 70-U-A-S product photo

PERMI-L 70-U-A-S

Product ID: PERMIL70UAS
Unit of Measure
12/EA
Min Order Qty
12
Packaging
Bulk
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PERMI-L SM VENT FILTER product photo

PERMI-L SM VENT FILTER

Product ID: PERMILSMVENTFILTER
Unit of Measure
1/EA
Min Order Qty
1
Packaging
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DFT Classic®, Filter Cartridges, Removal Rating 1 μm, Length 19.5 Inches, 304 stainless steel product photo

DFT Classic®, Filter Cartridges, Removal Rating 1 μm, Length 19.5 Inches, 304 stainless steel

Product ID: C001AW195A
Unit of Measure
1/EA
Min Order Qty
1
Packaging
Bulk
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DFT Classic®, Filter Cartridges, Removal Rating 1 μm, Length 10 Inches, 316 stainless steel, with Core Cover product photo

DFT Classic®, Filter Cartridges, Removal Rating 1 μm, Length 10 Inches, 316 stainless steel, with Core Cover

Product ID: C001A10SC
Unit of Measure
30/EA
Min Order Qty
30
Packaging
Bulk
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C001AW20U product photo

C001AW20U

Product ID: C001AW20U
Unit of Measure
1/EA
Min Order Qty
1
Packaging
Bulk
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DFT Classic®, Filter Cartridges, Removal Rating 1 μm, Length 20 Inches, Polypropylene

Product ID: C001AW20U1PK
Unit of Measure
10/EA
Min Order Qty
10
Removal Rating
1 µm
Cartridge Length (Imperial)
20 in
Cartridge Length (Metric)
508 mm
Cartridge Length (Metric)
50.8 cm
Cartridge Outer Diameter (OD) (Imperial)
2.5 in
Cartridge Outer Diameter (OD) (Metric)
6.4 cm
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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.