Manager Sales and Marketing

Jonas Nicoll
Manager Sales and Marketing

telefon +49 7121 894-181

Venting Elements made from Porous PTFE Permeaflon®

Venting Elements Permeaflon®

In the interior of hermetic housings and in headlamps or batteries changes in temperature or differences in height cause substantial variations in the internal pressure. Permeaflon® venting elements from Berghof compensate for differences in pressure and prevent penetration by water, dust, grime and even oils. The venting elements therefore guarantee the reliable functioning of components in the vehicle over their long life cycle. Thanks to its stable shape Permeaflon® venting elements can be supplied as backing-free film membranes in the form of reel packaging and also as precisely fitted stamped and turned parts in accordance with customers’ specifications. 


Permeaflon® pressure compensation units consist of pure, porous PTFE and are therefore resistant to all media. Berghof porous PTFE is sintered at over 300 °C, providing the Permeaflon® pressure compensation units with maximum thermal and dimensional stability. This makes it possible to realize even the most demanding applications (such as those involving direct contact with the engine for instance) without difficulty. In addition, the film membranes require no backing material, thus eliminating the risk of functional failure by delamination.

Material Porous PTFE

The right venting element for your housing

As the specialist in ventilation and airextraction products Berghof offers individually customized venting element. As a competent partner Berghof provides its customers with assistance right from the very first stage of development, accompanying the developmental process from evaluation of the required performance as regards airflow rate and water retention, right through to the geometry and assembly for optimal integration in the customer’s structural component.


  • High water retention capacity

  • IP54 to IP68 feasible

  • Porosity adjustable for highest air flow

  • Continuous venting

  • Burstable (emergency degassing)

  • Easy processing: welding and bonding possible

  • Customized membranes for various applications

  • Manufacturing as per IATF 16949:2016 (automotive standard)

  • 100% airflow testing and camera inspection (pin-hole, impurity) on membranes

Resistance/Testing Methods

  • DIN EN 60068-2-2 B dry heat (high temperature)

  • DIN EN 60068-2-14 N temperature changes

  • DIN EN 60068-2-60 corrosion testing with flowing mixed gas

  • DIN EN 60068-2-67 humid heat 

  • DIN EN 60068-2-78 humid heat, constantly

  • ISO 16750-5 chemical stess 

  • IEC 60068-2-11 salt fog

  • Customized testing: several weeks of impinging with urea solution AdBlue® (no penetration of crystals through the membrane)


  • Brake systems

  • Batteries and high-voltage batteries

  • Control housings

  • Tank ventilations

  • Lamps and lighting systems

  • Sensor housings

  • Control cabinet venting

  • Packaging

  • Electronic devices

  • Sensors for gas measurement technology
  • Filtration technology


Membrane Testing TOM

(pdf | 338 KB)