• our science our science Our Science
    • By Industry

      • Bioprocessing

        • Upstream

        • Downstream

        • Fill/Finish

        • Oligonucleotides

      • Cell and Gene Therapy

        • Upstream

        • Downstream

        • Fill/Finish

        • Oligonucleotides

      • Pharmaceutical

        • Oligonucleotides

        • Small Molecule

    • By Application

      • Buffer Prep

        • Chemical and Bioprocessing Containers

        • Filtration and Purification

        • Mixing Systems

        • Tubing and Pipe

        • Tube Sets and Manifolds

        • 2D and 3D Bags

        • Cynergy® Fittings

        • Cynergy® Valves

        • Custom Dip Tubes, Tanks, and Containers

        • NOWPak® Liner Based Systems

      • Bulk Fill

        • 2D and 3D Bags

        • Tube Sets and Manifolds

      • Cell Growth

        • Motion Bioreactor Bags

        • 2D and 3D Bags

        • Tubing and Pipe

        • Tube Sets and Manifolds

      • Cell Separation

        • Filtration and Purification

        • Tube Sets and Manifolds

        • Tubing and Pipe

        • 2D and 3D Bags

        • Microcarrier and Cell Separation Systems

      • Facilities/Bulk Chemicals

        • Chemical and Bioprocessing Containers

        • 2D and 3D Bags

        • NOWPak® Liner Based Systems

        • Tube Sets and Manifolds

      • Fill/Finish

        • Tube Sets and Manifolds

        • 2D and 3D Bags

      • Freezing

      • Media Prep

        • 2D and 3D Bags

        • Filtration and Purification

        • Mixing Systems

        • Tube Sets and Manifolds

        • Tubing and Pipe

      • Medical Devices

        • Dental

        • Eye Care

        • Implantable Devices

        • Medical Ultrasound

        • Wound Care

      • Quality Control

        • Particle Characterization

      • RNA and DNA Solutions

        • Oligonucleotides

      • Small Molecule

        • Liquid Filters

        • Catalysts

        • Ligands

        • Organophosphorus Compounds

        • Filtration and Purification

      • Storage

        • Chemical and Bioprocessing Containers

        • 2D and 3D Bags

        • Tubing and Pipe

        • Tube Sets and Manifolds

        • NOWPak® Liner Based Systems

    • By Location

      • Hangzhou Facility

      • Life Sciences Technology Center

  • product catalog product catalog Product Catalog
    • Single-Use Assemblies

      • 2D and 3D Bags

      • Mixing Systems

      • Motion Bioreactor Bags

      • Microcarrier and Cell Separation Systems

      • Tube Sets and Manifolds

      • Secondary Containment

    • Filtration and Purification

      • Liquid Filters

      • Vent Gas Filters

    • Fluid Management

      • Tube Sets and Manifolds

      • Cynergy® Valves

      • Cynergy® Fittings

      • Custom Dip Tubes, Tanks, and Containers

      • Tubing and Pipe

    • Process Monitoring

      • Particle Characterization

    • Chemical Packaging

      • FluoroPure® HDPE Blowmolded Drums

        • FluoroPure® Trilayer HDPE Blowmolded Drums

        • FluoroPure® Advantage Trilayer HDPE Blowmolded Drums

      • NOWPak® Liner-Based Systems

      • FluoroPure® Composite Drums

      • FluoroPure® Intermediate Bulk Containers

      • Sentry® Quick Connect Systems

    • Specialty Chemicals

      • Catalysts

      • Ligands

      • Organophosphorus Compounds

      • Siloxanes

      • Specialty Acrylates and Methacrylates

      • Specialty Additives

    • Premium Graphite

      • Life Sciences Graphite Grades

      • Premium Graphite Components

      • Graphite Processing Options

  • resources resources Resources
    • Industry Insights

      • Aramus™ Shaped 2D Single-Use Bags

      • Cell and Gene Therapy

      • Cold Chain Bioprocessing

      • Filter Bag Assembly

      • High-Density Cell Banking

      • Life Sciences Filtration

      • Low-Temperature Bioprocessing

      • Nanoparticles

      • Pandemic Response

      • Particle Characterization

      • Single-Use Solutions for Bioprocessing

      • USP Subvisible Particulate Testing

      • Cell Expansion and Cryogenic Banking

    • Reference Materials

    • Technical Information

      • Material Properties and Safety

      • Particle Characterization Applications

      • Chemical Compatibility

    • Entegris Blog

  • about us about us About Us
    • Corporate Overview

    • Corporate Social Responsibility

    • Careers

    • Events

    • Investor Relations

    • Legal/Trademark Notices

    • Locations

    • News Releases

    • Media Coverage

    • Entegris Blog

Expanded Capabilities for Filtration Through new Filter Bag Assembly, Offering Comprehensive Upstream and Downstream Operational Solutions


After decades as a leading filtration supplier to the demanding semiconductor market, Entegris has applied our uncompromising commitment to quality and purity to helping customers in bioprocess manufacturing. The addition of a single-use, sterilizing grade, PES filter into our life sciences portfolio perfectly complements our existing single-use bioprocess assemblies.

With this portfolio expansion, we now leverage quick-turn design and custom assembly capabilities alongside filtration expertise to provide customers a comprehensive bioprocess solution for upstream and downstream operations.

Entegris offers filtration implementation and on-going support by helping select filters, troubleshoot, and/or scale bioprocessing steps. We are committed to providing continuous support for your single-use needs and integration into critical processing step.

We offer a variety of bag assemblies, manifolds, and tube sets to fit perfectly into your process, with consistently fast development and delivery times.


Pharmsteri™ II PES 0.22 Buffer Capsule Filter


Our Pharmsteri II PES 0.22 buffer capsule filter is a PES 0.22 µm filter that offers customers superior flow performance. It maximizes throughput performance, enhances flow rates, provides adequate chemical compatibility, and is high quality for integration into single-use systems. These properties enable customers to decrease the frequency of filter changeouts, eliminate process interruptions, and improve filter lifespan. The filter is designed for the sterile filtration or bioburden reduction of process fluids in biopharma and pharma processes, including buffers, media, intermediates, and other non-fouling applications.

  • The asymmetric PES membrane is sterilizing grade and meets bacterial retentiveness per ASTM F838-20, to ensure that microorganisms, such as bacteria, are removed from the fluid stream.
  • Cutting-edge filter design has been optimized for pleat geometry and performance, thereby delivering superior flow rates in a broad range of chemical conditions.
  • Gamma-stable materials of construction with 1.5” sanitary Tri-Clamp® connections allows easy integration into any customer-specific, single-use assembly.
  • Comprehensive field and application support capabilities in Billerica, MA, Logan, UT, and Hangzhou, China.
  • Autoclavable materials allow users to integrate filters in situ to meet their own specific templates and needs.

Manufacturing Process


Throughout the manufacturing process, Entegris has applied a high level of quality controls to ensure the production of each device with top-tier quality.

Pharmsteri™ II PES 0.22 buffer capsule filters provide high throughput performance with excellent biocompatibility during upstream or downstream bioprocesses wherever sterile filtration is needed.

We offer best-in-class lead times, meaning we can have a filter at your door in a matter of days or weeks.