BTM Filters

For bioburden reduction of process gases, non-aqueous liquids and tank vent filtration.

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

PTFEBTM Filters are a family of hydrophobic Polytetrafluoroethylene (PTFE) membrane products.



  • Optimized for flow and throughput
  • Resist wetting by airborne water droplets
  • Each cartridge module is individually tested using the water intrusion method
  • 0.10 to 5.0 micron pore size
Filtration Area

btm filtration area

View Data Sheet for further product information
  • Integrity test specifications
  • Flow rates for all pore sizes
  • Materials of construction
  • Operating parameters
  • Sanitization and sterilization
  • Regulatory & compliance



BTM filters are validated using test procedures that comply with ASTM F 838-15(ae1) protocols for the determination of bacterial reduction in filters used for liquid filtration. The filters are challenged with the organisms listed below.

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

BTM 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. 


Critical Process Filtration black and white capsule with etched logoBTM Cartridges 

Available from 5-40 inches in length with several end connections and O-ring options. 

btm cartridge flowchart        

Critical process black and white capsule with cutout to show cartridge etched logoBTM Capsules

These filters are BTM 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. 

btm capsule flowcharts

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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