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

Cartridge Length (Imperial)

4 in

Poly-Fine® XLD Filter Cartridges, Removal Rating 3 μm, Polypropylene, Length 4 inches, EPDM, SOE flat closed end external 222 O-rings

Product ID: XLD34UEM3
Unit of Measure
1/EA
Min Order Qty
1
Removal Rating
3 µm
Membrane Material
Polypropylene
Cartridge Length (Imperial)
4 in
Cartridge Length (Metric)
102 mm
Cartridge Length (Metric)
10.2 cm
Gasket / O-Ring Material
EPDM
See All Attributes

Nexis® T Filter Cartridges, Removal Rating 5 μm, Polypropylene, Length 4 inches, DOE Santoprene gasket seal

Product ID: NXT54UH21
Unit of Measure
60/EA
Min Order Qty
60
Removal Rating
5 µm
Membrane Material
Polypropylene
Cartridge Length (Imperial)
4 in
Cartridge Length (Metric)
102 mm
Cartridge Length (Metric)
10.2 cm
Gasket / O-Ring Material
NA
See All Attributes

Nexis® T Filter Cartridges, Removal Rating 20 μm, Polypropylene, Length 4 inches, EPDM, SOE flat closed end external 222 O-rings

Product ID: NXT204UM3E
Unit of Measure
30/EA
Min Order Qty
30
Removal Rating
20 µm
Membrane Material
Polypropylene
Cartridge Length (Imperial)
4 in
Cartridge Length (Metric)
102 mm
Cartridge Length (Metric)
10.2 cm
Gasket / O-Ring Material
EPDM
See All Attributes
Poly-Fine® II, Filter Cartridges, Removal Rating 0.8 μm, Polypropylene, Length 4 Inches, Expanded PTFE gaskets FEP encapsulated silicone Orings product photo

Poly-Fine® II, Filter Cartridges, Removal Rating 0.8 μm, Polypropylene, Length 4 Inches, Expanded PTFE gaskets FEP encapsulated silicone Orings

Product ID: PFT084UTM3
Unit of Measure
1/EA
Min Order Qty
1
Micron
0.8 µm
Poly-Fine® II, Filter Cartridges, Removal Rating 0.2 μm, Highly Asymetric Polysulfone, Length 4 Inches, EPDM, SOE flat closed end external 226 O-rings product photo

Poly-Fine® II, Filter Cartridges, Removal Rating 0.2 μm, Highly Asymetric Polysulfone, Length 4 Inches, EPDM, SOE flat closed end external 226 O-rings

Product ID: PFT024UEM6
Unit of Measure
1/EA
Min Order Qty
1
Micron
0.2 µm
Poly-Fine® II, Filter Cartridges, Removal Rating 0.8 μm, Polypropylene, Length 4 Inches, silicone product photo

Poly-Fine® II, Filter Cartridges, Removal Rating 0.8 μm, Polypropylene, Length 4 Inches, silicone

Product ID: PFT084USM3
Unit of Measure
1/EA
Min Order Qty
1
Micron
0.8 µm

This product is currently not available. Please contact us for more information.

Nexis® A Series Filter Cartridges, Removal Rating 50 μm, Polypropylene, Length 4 inches

Product ID: NXA504U
Unit of Measure
30/EA
Min Order Qty
30
Removal Rating
50 µm
Membrane Material
Polypropylene
Cartridge Length (Imperial)
4 in
Cartridge Length (Metric)
102 mm
Cartridge Length (Metric)
10.2 cm
Gasket / O-Ring Material
NA
See All Attributes
Poly-Fine® II, Filter Cartridges, Removal Rating 0.2 μm, Highly Asymetric Polysulfone, Length 4 Inches, EPDM, SOE flat closed end external 222 O-rings product photo

Poly-Fine® II, Filter Cartridges, Removal Rating 0.2 μm, Highly Asymetric Polysulfone, Length 4 Inches, EPDM, SOE flat closed end external 222 O-rings

Product ID: PFT024UEM3
Unit of Measure
1/EA
Min Order Qty
1
Micron
0.2 µm
Poly-Fine® II, Filter Cartridges, Removal Rating 10 μm, Polypropylene, Length 4 Inches, EPDM, DOE industrial product photo

Poly-Fine® II, Filter Cartridges, Removal Rating 10 μm, Polypropylene, Length 4 Inches, EPDM, DOE industrial

Product ID: PFT104UE
Unit of Measure
1/EA
Min Order Qty
1
Micron
10 µm

Nexis® T Filter Cartridges, Removal Rating 40 μm, Polypropylene, Length 4 inches

Product ID: NXT404U
Unit of Measure
30/EA
Min Order Qty
30
Removal Rating
40 µm
Membrane Material
Polypropylene
Cartridge Length (Imperial)
4 in
Cartridge Length (Metric)
102 mm
Cartridge Length (Metric)
10.2 cm
Gasket / O-Ring Material
NA
See All Attributes
Poly-Fine® II, Filter Cartridges, Removal Rating 3 μm, Polypropylene, Length 4 Inches, EPDM product photo

Poly-Fine® II, Filter Cartridges, Removal Rating 3 μm, Polypropylene, Length 4 Inches, EPDM

Product ID: PFT34UEM3
Unit of Measure
1/EA
Min Order Qty
1
Micron
3 µm

Discontinued

This part is no longer available. Please contact us for more information.
NXA 1-4U-M3S product photo

Nexis, NXA, 1 μm, 10.2 cm (4 in), SOE flat closed end, external 222 O-rings (retrofits other manufacturers’ Code 0), Silicone gasket

Product ID: NXA14UM3S
Unit of Measure
1/EA
Min Order Qty
1
Micron
1 micron
40 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.