Tailored solutions for sustainable water

About Duraflow

Duraflow is a global leader in the design, engineering, and manufacture of high-quality tubular membrane filters for industrial wastewater treatment. Their products are developed to help companies increase their competitiveness, improve plant performance, and protect the environment.

The company is headquartered in Tewksbury, Massachusetts, USA. Their fundamental business focus is providing quality products and service. They continually invest in research and development to improve product functionality and longevity while reducing energy consumption. 

Duraflow has met demands for worldwide expansion by establishing distribution and service networks at strategic locations across the globe, including South Africa. Their global infrastructure and uncompromising commitment to product quality and development has earned Duraflow its reputation for supplying world-class membrane technology around the world.

Tubular membranes

Crossflow tubular membranes

Duraflow builds specialty crossflow tubular membranes for industrial wastewater treatment. Duraflow’s membranes have the high flux rate of a microfilter and provide complete suspended solids removal and fine filtration of an ultrafilter.

Duraflow manufactures the membranes in a tubular configuration capable of handling high solid concentrations. The membranes, made of PVDF, are cast on the surface of 2.54 cm diameter porous polymeric tubes to produce a nominal pore size of 0.1 micron. The extraordinary chemical resistant property of PVDF allows the use of a wide range of chemicals – acids, bases, and oxidizers – for cleaning of the persistent fouling substances.


Applications of crossflow tubular membranes 

  • Metal finishing
  • Photovoltaic
  • Power generation
  • Printed circuit board
  • Semiconductor
  • Steel
  • General industry

Specific treatment processes

  • Softening
  • Sulfate removal
  • RO brine recovery
  • Side stream management
  • Process water purification

Advantages of crossflow tubular membranes 

  • Uniform pore size produces consistent high filtrate quality
  • High-porosity substrate yields high flux
  • Strong membrane-to-substrate composition extends filter service life
  • Low-fouling tubular configuration provides high-solid tolerance (2-3 wt % TSS)
  • Chemical-resistant PVDF membrane can be cleaned effectively with strong chemicals
  • Extended module train design results in energy cost savings and foot print reduction

Duraflow Micro Filtration Membranes