WMT Drum Filters

Putting Experience Into Action

State-of-the-art microscreen filters for water treatment.

A breakthrough in reliability and operating efficiency. The new WMT Drumfilter: enhancing a well-known and proven design in several significant aspects.

Innovative features deliver enhanced performance and reliability.

The new WMT Drumfilter is built on all the well-known and proven  benefits of the microscreen drumfilter used extensively today. However, the WMT Drumfilter goes further in enhancing several significant aspects.

The WMT Drumfilter is a mechanical, self-cleaning microscreen filter designed for high performance in water-treatment systems where it’s essential to minimize particle break-up. It’s ideal for use in aquaculture applications as well as industrial and municipal water and waste-water treatment. The filter design ensures careful handling of  solids, essential to achieve the high filtration efficiency required in many applications.

WMT drumfilter models

WMT Drumfilter Features:

  • Improved Structural Integrity
  • Increased Submergence (Up to 65%)
  • Non-Metallic Chain Drive
  • Two Styles of Filter Elements (PG or MR)
  • No Lubrication Required
  • Moving Spray Bar

Technical Specifications:

Model Range

  • Freestanding stainless steel tank version. (A)
  • Stainless steel frame version. (B)
  • GRP tank version. (C)

Size Range

  • 2000 mm diameter:Sizes: 5, 6, 7, 8, 9 and 10 sections
  • 1600 mm diameter:Sizes: 4, 5, 6, 7, 8, 9 and 10 sections
  • 1200 mm diameter:Sizes: 1, 2, 3, 4, 5, 6, 7 and 8 sections
  • 800 mm diameter: Sizes: 1, 2, 3 and 4 sections
  • 500 mm diameter: Sizes: 1 section only

Re-Inventing Water Treatment

It all started in 1984, when CEO Nils-Åke Persson was a consultant engineer, designing solutions for fish farms. However, the available filtration technology wasn’t adequate, and Mr. Persson had a vision for how he could improve it. To make this vision a reality he founded Hydrotech, and just a year later his first microscreen filter became an instant success in the fish farm industry. Five years later he released the drumfilter, which became equally successful. In 1995 the company released its next innovation, the game-changing discfilter microscreen, mainly targeting the municipal water treatment market.

Finally, after almost 20 years of successful innovation, Nils-Åke Persson sold his company to the American group US Filter in 2002. Two years later he left the company and his position as CEO.

In 2013, Nils-Åke Persson and his partners returned, founding NP Innovation, and reclaiming their position in the field of microscreen filter development.

The WMT Drum Filter Brochure is available for preview and download here.