Enhancing product performance
with innovative filtration technology

Membrane Filtration Media

You run a complex business, and every aspect needs to run smoothly. Our experienced, market-specific specialists are eager to understand your operation, processes, and unique product requirements to help identify the ideal filter membrane solution for your application.
Skilled Collaboration
  • Passion for engineering collaboration and product innovation
  • Eager to explore and invest in custom solutions and opportunities in partnership with you
  • Years of application expertise and problem-solving experience across multiple segments
Performance-Driven Materials
  • Consistent, fully validated materials that meet high-performance requirements with every single order.
  • Innovative solutions engineered and comprehensively tested to your exact requirements.
  • Comprehensive portfolio of standard and customizable solutions featuring our proprietary, industry-leading Tetratex® PTFE membranes.
Unrivaled Customer Support
  • Global manufacturing and distribution capabilities help ensure consistent supply and timely delivery.
  • Experienced regional technical specialists provide strong pre- and post-sale support.
  • Reliable partner with 100+ years of global filtration industry leadership.

Tetratex® ePTFE Membrane

Fully validated filtration media to meet your high-performance requirements.


Fuel Cell Stacks

For light-duty and heavy-duty vehicles as well as green hydrogen production, our broad range of ePTFE structures used as reinforcement for PEM membrane offers:

  • Strong mechanical strength
  • Balanced mechanical strength on machine direction (MD) and transverse direction (TD)
  • Low proton resistance
  • Well-controlled properties, including thickness (density), pore size and porosity, etc.
  • Low-cost solution for fuel cell stack durability
Medical Devices

Donaldson’s technologically advanced enclosure protection vents offer protection against liquids and particulates while delivering maximum performance where it matters most.

  • Our team of experts combines experience with superior technical capabilities to find the best solutions in the most challenging applications, like ostomy bags, syringe filters, and hearing aids.
  • In ostomy bags, for example, Donaldson enclosure protection vents allow air and other gases to vent without allowing passage of liquids or particulates through the vent, and our adsorbent venting solutions diminish unwanted odors, improving wearer comfort.
Reliable Microfiltration

Tetratex ePTFE membrane has a unique microporous structure that delivers a high flow rate, a high number of sterilization cycles, and long life.

  • It performs separation, purification, and sterilization functions in a variety of air and liquid ultra-high purity gas microfiltration systems.
  • Microfiltration applications include pleated cartridge filters, capsule, and point-of-use filters, and laboratory disc filters.
Filter Bags

Tetratex filter media can help enhance the performance of a fabric filter by utilizing surface filtration technology as opposed to traditional depth filtration methods.

  • Tetratex filter media can be laminated to a variety of base substrates to provide a complete range of media including woven and felted textile media for conversion into all types of filter bags as well as pleatable media for cartridge-style elements.
  • The unique structure of Tetratex ePTFE membrane filter media helps prevent the penetration of fine dusts into the supporting substrate and facilitates excellent cleanability due to its nonstick characteristics.



Donaldson Membrane Fuel Cell Solutions

Donaldson Membrane Fuel Cell Solutions

Donaldson’s Tetratex™ expanded PTFE media provides optimal structural support to promote efficient ion transfer and durability within fuel cell electrode assemblies.


Have more questions about how our products benefit your business?