Sebastian Berger, International Sales Manager

Sebastian Berger
International Sales Manager

telefon +49.7121.894-275

Filter Elements made from Porous PTFE Permeaflon®

Filter Elements

We are producing symmetrical porous Permeaflon® filter elements made from pure PTFE granulate using a press-sinter process. Therefore, our filter elements combine the outstanding characteristics of the material PTFE and a good mechanical inherent strength. This is why we are able to process them into a variety of specific filter elements with our highly modern machinery. The special feature of Permeaflon® filter elements: Their homogeneous, adjustable porosity results in an ideal gas permeability and a hydrophobic and anti-adhesive behaviour at the same time. Moreover, our filter elements are chemically inert and highly thermally resistant. Thus, they can even be used in industry sectors with highest requirements.


  • Filter elements made from porous PTFE; sintered for highest mechanical inherent stability
  • Self-supporting and self-sealing
  • Isostatically molded, for homogeneous porosity
  • Adjustable pore size between ~1 and 100 µm
  • Standard filtering degrees: 2 and 20 μm nom.
  • Extremely hydrophobic und optionally oleophobic
  • Highest chemical resistance
  • Physiologically harmless, suitable for food contact


Berghof manufactures self-supporting and self-sealing Permeaflon® filter tubes in different wall thicknesses and porosities for installation in filter housings. The main applications of Berghof’s filter elements are as so-called diaphragms or HPLC filters in the analysis technology. Their high purity provides contamination-free measurement results and their adjustable porosity ensures optimal response times of gas sensors. Furthermore, our filter tubes serve as standard filters at gas filtration, even for highly aggressive gases. In this case, their task is to filter smallest particles and aerosoles during the process. Another typical application: our hydrophobic filters ensure consistent gassing of liquids in gas-liquid-separation processes or aerators, for example in the chemical or food industry.


Berghof’s specialty: we combine virginal, massive with porous PTFE for filter elements with integrated threaded connectors. They can be screwed comfortably and self-sealing. The main use of hydrophobic and gas-permeable sensor protection caps by Berghof is the environmental metrology, where they protect the delicate sensors of measuring instruments from unintentional access and weather related impacts.