PTM Sterilizing Filters

For the sterilizing filtration of gases and non-aqueous liquids.

  • Compressed Air
  • Pressurized Gases
  • Fermentation Air
  • Solvents
  • Tank Vents
Features and Benefits

PTFEPTM Filters are a family of validated Polytetrafluoroethylene (PTFE) membrane products for the sterilization of process gas applications and tank vents.


  • Hydrophobic - filters resist wetting by airborne water droplets, making them ideal for air and gas applications
  • Broad chemical compatibility
  • Well suited for aggressive solvents and other non-aqueous liquids
  • Pore sizes range from 0.10 to 5.0 micron 
Filtration Area

PTM filtration area

For the following product information, click on the datasheet below:
  • Integrity test specifications
  • Flow rates for all pore sizes
  • Materials of construction
  • Operating parameters
  • Sanitization and sterilization
  • Regulatory & compliance

PTM Filters

PTM Mini-Capsules

PTM/HA Filters

PTM/HT Filters


PTM filters are validated using test procedures that comply with ASTM F 838-15(ae1) protocols for the determination of bacterial retention in filters used for liquid filtration. The challenge level is a minimum of 107 organisms per cm2 of filter media. CPF filters have > 7-log removal when challenged with the organisms (0.10µm and 0.22µm meets the FDA definition of sterilizing grade filters).

  • 0.10µm: Brevundimonas diminuta
  • 0.22µm: Brevundimonas diminuta
  • 0.45µm: Serratia marcescens

Validation Guides available upon request.

Quality Assurance

PTM filters are 100% integrity tested. CPF filters are developed and manufactured under an ISO 9001:2015 certified Quality Management System and designed to be used in cGMP-compliant processes. 

Black and white cartridge etched logo-png-2PTM Cartridges 

Available from 5-40 inches in length with several end connections and O-ring options. For applications using elevated temperatures, PTM/HT Cartridges can be used in processes up to 221°F. 


Black and white capsule etched logo-pngPTM Capsules

These filters are PTM cartridges encapsulated in a polypropylene shell to minimize exposure to process fluids. A popular choice for single-use applications and can be disposed of easily. Sizes range from 2-30 inches in length. 

Black and white minicapsule etched logo-pngPTM Mini-Capsule

Mini-capsules are designed for lab scale testing, process development and small batch production with a filtration area of 500 cm2

Why Choose Critical Process Filters?

Quality & Performance
  • Over 20 years of engineering and manufacturing the finest filters for critical applications. 
  • Compliance with industry standards required for your operation
  • Product optimization to meet your performance goals
  • ISO 9001:2015 certified Quality Management System
  • Appropriately rated clean room environment
  • Proven success in pharmaceutical and bioprocessing applications
Price Advantage

It's simple. Our products are very competitively priced. Learn more

Services & Support
  • Presales evaluations/recommendations by highly experienced Application Engineers 
  • Post sales support and trouble shooting
  • Testing & Analysis services (our site or yours)
  • Validation Services

Made in USA 800   90012015Large-(1)

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