String Wound Filter Cartridge


A natural material that is suitable for various industries

Wound Filter Cartridge is also called String Wound Filter Cartridge in Brother Filtration. It is another type of depth cartridge filters and suits for many applications where larger dirt holding capacity is requested.

What is a Wound Filter Cartridge?

Wound Filter Cartridge is capable of eliminating rust, dirt, and other sediments from water by using fibers.The string material can be from nylon, polyester, cotton, etc. It wraps on a center core like stainless steel or polypropylene.

String Wound Filter Cartridges are another effective way of removing sediment particles from your water. These filters are also called depth filters because they use 2 layers of filtration to keep out unwanted particles.

The first layer catches any particles that are the same size or larger than the micron rating, while the inner layer catches smaller particles that slip through the initial filtration. This enhanced filtration comes at the cost of surface area, meaning that depth filters usually need to be cleaned/changed quicker than pleated filters.

What is a cotton string wound filter cartridge?

Cotton String Wound Cartridge is made of cotton yarn wound around a porous inner core precisely to accomplish depth filtration. The different filtration ratings are realized by smart control during the production to form various filtration layer intensities and filtration pore shapes.

Outside filtration layers of the cotton wound filter cartridge are of loose density and coarse pore size. The specifications of the inside filtration layers are of the contrary parameters.

Brother Filtration ProClean Cotton String Wound Cartridge Filter is made on precision-crafted machines in our factory. High dirt-holding and retention capabilities are offered by ProClean Cotton filters, which also have no media migration. They are utilized in a variety of processes, such as aromatic solvent, photographic film, edible oils, water treatment, lubricant, pharmaceuticals, beverage production, and condensation preparation.

When we manufacture cotton string wound cartridges, we don’t use any odor, foaming, or adhesives, so our cotton string wound cartridge is safe for edible oil and beverage industries. And, it has a stable structure and wide chemical compatibility, which enable it to handle many chemical applications.


As a competitive depth filter cartridge product, Brother Filtration ProClean Cotton String Wound Cartridge has various abilities and can handle many different conditions.

  • Without odor, foaming, adhesives
  • No fine fiber drops out
  • Wide chemical compatibility
  • Various cores and end caps, fit for housings
  • Graded honeycomb pore structure provides true depth filtration
  • Optional spiral stainless steel inner core
  • Different lengths and outside diameters are available for different filtration area requests
  • Suitable for various applications

We are confident to recommend this cotton string wound cartridge for you. It would be a great choice for many industries, which have perfect filtration performance with high quality.

  • High flow rates
  • Low differential pressures
  • High dirt-holding capacity
  • High porosity
  • Withstand high temperature and consistency of good performance


Micron Rating 1.0, 3.0, 5.0,10, 20, 30, 50,70,100
Dimensions Length (mm) 10inch, 20inch, 30inch, 40inch, 50inch, 60inch,70inch
OD (mm) 2.4″ (62mm) 2.5″ (64mm) 4.5″ (114mm)
ID (mm) 1.1″ (28mm)
Materials Media Media Cotton Blench Cotton Media
Core Polypropylene/SUS 304/SUS 316
Connection Type DOE/222 Fin/222 Flat/226 Fin/226 Flat
O-ring Material Silicon/Viton/EPDM/BUNA
Maximum Operating Temp: Cotton: SS core <120*C


Rating and flow rate

Micron Rating 1 3 5 10 20 30 50
Maximum flow rate(L/m) 9 12 18 30 37 42 44


1. The measured cartridge length is 250mm.
2. The pressure difference is 0.02MPa.
3. The tested medium is clean water and the temperature is room temperature.
Please use these parameters to deduce the flow rate of other cartridges.

Order Information

BCSW -025 -PP -5 -0100 -E -0 -P
Product Type Material Length Micron Rating O-ring Connection Inner Core
ProClean String Wound Cartridge 025=OD 2.5inch
045=OD 4.5inch
GF=Glass Fiber
5=5 inch
1=222 Flat
2=222 Fin
3=226 Flat
4=226 Fin
P=PP Core
S=SUS 304
U=SUS 316
1 inch =25.4 cm
Notice: Due to the filter having variety in design, please contact BROTHER sales for more information
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