EPS Filters

For removing fine and ultrafine particles from aqueous liquids.

  • UPDI Water
  • Acids & Bases
  • Etch Baths
  • Solvents
  • Bulk Chemicals
  • Plating Solutions
Features and Benefits

PES SymmetricEPS is a family of single layer Polyethersulfone (PES) filters. 


  • Low extractables for fast rinse-down to resistivity and TOC limits
  • Deliver high flow and throughput
  • Chemical compatibility across a wide pH range
  • Pulse power flushed until the rinse effluent reaches 18+ Megohm-cm and less than 3ppb TOC
  • Pore sizes range from 0.02 to 0.45 micron
Filtration Area
wps filtration area
View Data Sheet for further product information:
  • Integrity test specifications
  • Materials of construction
  • Operating parameters
  • Sanitization and sterilization
  • Regulatory & compliance

EPS Filters

EPS Mini-Capsules

EPS/HT Filters

EPS/HA Filters

Quality Assurance

EPS 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. 

EPS Cartridges 

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

EPS cartridge        Critical Process Filtration black and white capsule with etched logo 

EPS Capsules

These filters are EPS cartridges encapsulated in a polypropylene shell to minimize exposure to process fluids. Sizes range from 2-30 inches in length. 

EPS capsule        Critical process black and white capsule with cutout to show cartridge etched logo 

EPS Mini-Capsule

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

eps mini capsule-1     Critical Process black and white mini capsule with etched logo

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 electronics 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)

Let's start a conversation today!

See our Privacy Policy.