PRISM® Membrane Separators

Your clear choice when you need a reliable, mobile, and low-maintenance membrane separator for your product line of gas systems. PRISM Membrane Separators consist of thousands of hollow fibers that act as a molecular filter to separate compressed gases into individual elements, including nitrogen or hydrogen.

Whether you’re separating air for a nitrogen supply or upgrading biomethane, Air Products Membrane Solutions’ portfolio of PRISM Membrane Separators can deliver a pure, dry gas stream that is ready to use.

Our Offerings


PA Membrane Family

Commonly used for nitrogen
or oxygen enrichment
atmosphere (OEA) generation.

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PB Membrane Family

Commonly used for high
pressure applications such
as biogas upgrading.

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Dehydration Membranes

Commonly used to remove
water vapor from compressed
air streams.

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The benefits of PRISM Membranes

Field-proven in a wide variety of applications

Significant savings vs. other technologies

Easily expandable systems

Lightweight and compact

Minimal maintenance on membranes and systems

No moving parts

Ideal for remote locations

Long-lasting performance

How Membrane Separators Work

Each membrane separator contains thousands of asymmetric hollow fibers that act as a molecular filter. When high-pressure gas mixtures enter the separator, the gas components divide as a result of selective permeation. Fast gases (such as oxygen) permeate easily through the membrane wall and exit the side port. Slow gases (such as nitrogen) have a difficult time passing through the membrane wall and travel the bore of the fiber exiting through the port at the end of the shell.

Building Membrane Systems?

Our expert engineers can help you identify, design, and implement the optimal membrane separation system for your process or application.

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