S.E.W North Filtration A/S

PP Wounded Cartridges | Blue North


Wounded water cartridge

Hydrowound Filter Cartridges

Hydrowound filter cartridges manufactured by Filtration are the result of years of experience, as well as extensive research & development and state of the art manufacturing technology. They are designed to meet a variety of industrial processing needs and provide an exceptional quality media filter option. Hydrowound filter cartridges will revolutionize filtration with a superior technology that overcomes the limitations and drawback s of other cartridge filters.

Hydrowound filter cartridges are manufactured with increased filtration capacity, longer lifetime and higher performance that reduce overall costs. They have higher structural integrity combined with lower pressure drop, much improved dirt holding capacity and efficiency compared to other filter cartridges. Hydrowound filters are made of FDA grade Polypropylene yarn, a recognized environmentally safe and recyclable material for purity and ease of disposal.

Stringent lab tests are conducted and material test certificates are obtained to demonstrate our commitments towards meeting internationally recognized standards in regards to materials, designs, construction and performance. 

How it work

In Hydrowound filter cartridge, each of the filaments continues, without a break, throughout the length of the yarn, making the cartridge free from any media migration problem. There are no short fibers that can come loose and migrate, a common problem with conventional string-wound filters. Each yarn also traps the randomly protruding short loops of adjacent yarns resulting in a highly stable media structure providing an excellent knife-edge sealing property to the cartridge. Under conditions of varying flow and pressure fluctuations, the new cartridge is more resistant to particle unloading.

Finally, through improved winding technology, the pitch, number of crossings and space between each yarn is continuously varied and controlled from start to finish in making the cartridge. The inner layers of the yarns are wound close together and the space between yarns is gradually increased towards the outer layers, while the yarns remain locked together because of the random protruding loops. The winding technology gives improved true density grading, trapping coarser particles in the outer layers and finer particles in the inner layers. By maintaining the same winding tension, the structure has the same firmness throughout the depth of the cartridge, giving more consistent and better performance.


  • External Diameter: 63 mm ± 1 mm
    Internal Diameter: 27 mm ± 0.5 mm
  • Length: 10”, 20”, 30”, 40”
  • Micron Rating: 0.5, 1, 5, 10, 25, 50, 75 and 100
  • Media: Polypropylene, Cotton, Polyester, Glass Fiber
  • Core: PP, TS, SS

Flow rate of the liquid is dependent on raw water characteristics and micron size of the Hydrowound.


  • A broad range of media providing    excellent chemical compatibility
  • Polypropylene is FDA grade and acceptable for potable and edible liquid contact
  • Multiple length cartridges minimize change out time, eliminates spacers and are available to fit competitive
    filter vessels
  • Very effective in low viscosity solutions
  • Can withstand operating temperature up to 160ºF (70ºC)
  • Filtration of organic acids, alkalis, solvent and many other


Chemically compatible with:
  •  Aqueous Solutions
  •  Petroleum Oil & Lubes
  •  Animal & Vegetable Oils
  •  Micro Organisms / Bacteria
  •  Mineral Acids
  •  Alkaline Solutions
  •  Oxidizing Agents
  •  Organic Acids


Hydrowound cartridges are individually shrink-wrapped in a polyethylene tube, which is treated to minimize static build-up. The cartridges are then packed into cardboard cartons.

No. of cartridges available per carton:
  • 10” cartridges: 30 nos. box 385/330/265
  • 20” cartridges: 15 nos. box 515/330/185
  • 30” cartridges: 15 nos. box 772/330/185
  • 40” cartridges: 15 nos. box 1025/330/185




 DATA SHEETS | pdf files

Efficenvt performance PP Wounded  Cartridges
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S.E.W. North Filtration A/S • Vesterbrogade 1, Section C • DK 4930 Maribo • Denmark • TEL: +45 54 60 20 80 • FAX: +45 54 60 20 81 • E-mail: info@northfiltration.com • CVR/VAT no. DK33492871