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. 

Depth Filter Cartridges
Depth Filter Cartridges
Pleated Depth Filter Cartridges
Pleated Depth Filter Cartridges
Pleated Filter Cartridges
Pleated Filter Cartridges

Order Products

Brand

Poly-Fine®

Cartridge Length (Metric)

508 mm

Poly-Fine® II Filter Cartridge, PFT520USM7W480 product photo

Poly-Fine® II Filter Cartridge, PFT520USM7W480

Product ID: PFT520USM7W480
Unit of Measure
1/EA
Min Order Qty
1
Micron
5 µm

Poly-Fine® XLD Filter Cartridges, Removal Rating 10 μm, Polypropylene, Length 20 inches, silicone, DOE industrial

Product ID: XLD1020US
Unit of Measure
1/EA
Min Order Qty
1
Removal Rating
10 µm
Membrane Material
Polypropylene
Cartridge Length (Imperial)
20 in
Cartridge Length (Metric)
508 mm
Cartridge Length (Metric)
50.8 cm
Gasket / O-Ring Material
Silicone
See All Attributes

Poly-Fine® XLD Filter Cartridges, Removal Rating 20 μm, Polypropylene, Length 20 inches, Expanded PTFE gaskets FEP encapsulated silicone Orings, DOE industrial

Product ID: XLD2020UT
Unit of Measure
1/EA
Min Order Qty
1
Removal Rating
20 µm
Membrane Material
Polypropylene
Cartridge Length (Imperial)
20 in
Cartridge Length (Metric)
508 mm
Cartridge Length (Metric)
50.8 cm
Gasket / O-Ring Material
Expanded PTFE (gaskets) FEP encapsulated silicone (O-rings)
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Poly-Fine® XLD Filter Cartridges, Removal Rating 1.5 μm, Polypropylene, Length 20 inches, Nitrile, DOE industrial

Product ID: XLD1520UN
Unit of Measure
1/EA
Min Order Qty
1
Removal Rating
1.5 µm
Membrane Material
Polypropylene
Cartridge Length (Imperial)
20 in
Cartridge Length (Metric)
508 mm
Cartridge Length (Metric)
50.8 cm
Gasket / O-Ring Material
Nitrile
See All Attributes

Poly-Fine® XLD Filter Cartridges, Removal Rating 4.5 μm, Polypropylene, Length 20 inches, EPDM, SOE fin end external 226 O-rings

Product ID: XLD4520UEM7
Unit of Measure
12/EA
Min Order Qty
12
Removal Rating
4.5 µm
Membrane Material
Polypropylene
Cartridge Length (Imperial)
20 in
Cartridge Length (Metric)
508 mm
Cartridge Length (Metric)
50.8 cm
Gasket / O-Ring Material
EPDM
See All Attributes

Poly-Fine® XLD Filter Cartridges, Removal Rating 3 μm, Polypropylene, Length 20 inches, silicone, SOE fin end external 226 O-rings

Product ID: XLD320USM7
Unit of Measure
1/EA
Min Order Qty
1
Removal Rating
3 µm
Membrane Material
Polypropylene
Cartridge Length (Imperial)
20 in
Cartridge Length (Metric)
508 mm
Cartridge Length (Metric)
50.8 cm
Gasket / O-Ring Material
Silicone
See All Attributes

Discontinued

This part is no longer available. Please contact us for more information.

Poly-Fine® XLD Filter Cartridges, Removal Rating 1.5 μm, Polypropylene, Length 20 inches, EPDM

Product ID: XLD1520UENET
Unit of Measure
1/EA
Min Order Qty
1
Removal Rating
1.5 µm
Membrane Material
Polypropylene
Cartridge Length (Imperial)
20 in
Cartridge Length (Metric)
508 mm
Cartridge Length (Metric)
50.8 cm
Gasket / O-Ring Material
EPDM
See All Attributes

Poly-Fine® XLD Filter Cartridges, Removal Rating 3 μm, Polypropylene, Length 20 inches, FEP encapsulated fluorocarbon elastomer Orings, SOE fin end external 226 O-rings

Product ID: XLD320UFM7B229
Unit of Measure
1/EA
Min Order Qty
1
Removal Rating
3 µm
Membrane Material
Polypropylene
Cartridge Length (Imperial)
20 in
Cartridge Length (Metric)
508 mm
Cartridge Length (Metric)
50.8 cm
Gasket / O-Ring Material
FEP encapsulated fluorocarbon elastomer (O-rings)
See All Attributes

Discontinued

This part is no longer available. Please contact us for more information.

Poly-Fine® II, Filter Cartridges, Removal Rating 0.8 μm, Polypropylene, Length 20 Inches, Expanded PTFE gaskets FEP encapsulated silicone Orings, SOE fin end external 226 O-rings

Product ID: PFT0820UTM7
Unit of Measure
1/EA
Min Order Qty
1
Removal Rating
0.8 µm
Membrane Material
Polypropylene
Industry-Specific Certification
General Use
Cartridge Length (Imperial)
20 in
Cartridge Length (Metric)
508 mm
Cartridge Length (Metric)
50.8 cm
See All Attributes
Poly-Fine® II, Filter Cartridges, Removal Rating 0.25 μm, Polypropylene, Length 20 Inches, Silicone Elastomer product photo

Poly-Fine® II, Filter Cartridges, Removal Rating 0.25 μm, Polypropylene, Length 20 Inches, Silicone Elastomer

Product ID: PFT02520USM7W480
Unit of Measure
12/EA
Min Order Qty
12
Micron
0.25 µm
Poly-Fine® II Filter Cartridge, PFT1020USM7W480 product photo

Poly-Fine® II Filter Cartridge, PFT1020USM7W480

Product ID: PFT1020USM7W480
Unit of Measure
1/EA
Min Order Qty
1
Micron
10 µm

Poly-Fine® XLD Filter Cartridges, Removal Rating 1.5 μm, Polypropylene, Length 20 inches, EPDM, DOE industrial

Product ID: XLD1520UE
Unit of Measure
1/EA
Min Order Qty
1
Removal Rating
1.5 µm
Membrane Material
Polypropylene
Cartridge Length (Imperial)
20 in
Cartridge Length (Metric)
508 mm
Cartridge Length (Metric)
50.8 cm
Gasket / O-Ring Material
EPDM
See All Attributes
36 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.