Air-Oil Separators

For AOS, choose Ashra.

Precision-cleaned air. Reduced oil loss.

Lower oil carryover, cleaner downstream air, and more efficient compressor performance across demanding industrial applications. Ashra’s Sepracore Engineered Air Oil Separation Systems remove oil aerosols from compressed air using coalescing micro-glass fiber layers, effective down to sub-micron levels.

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Air-Oil Separators

For AOS, choose Ashra.

Precision-cleaned air. Reduced oil loss.

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A legacy of AOS excellence.

In 1985, Ashra became the first in India to indigenize and introduce air/oil separators, supplying them to Ingersoll Rand, Bengaluru.

A legacy of AOS excellence.

In 1985, Ashra became the first in India to indigenize and introduce air/oil separators, supplying them to Ingersoll Rand, Bengaluru.

AOS products by Ashra:

Engineered to fit your operation realities

Different compressors and operating conditions demand different separation designs. Ashra offers multiple AOS
formats optimized for airflow, pressure drop, service life, and fitment across screw-type and sliding vane compressors.

Wrapped AOS

Designed for outside-to-inside flow, this style eliminates oil aerosols from compressed st... Designed for outside-to-inside flow, this style eliminates oil aerosols from compressed steam, dust, and other airborne contaminants before they reach the downstream system, extending equipment life and reducing maintenance costs.

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Depth AOS

Built for higher oil aerosol loads in outside-to-inside flow and suitable for all versi... Built for higher oil aerosol loads in outside-to-inside flow and suitable for all versions of screw-type and sliding vane compressors. Multiple grades of glass fiber layers enable higher airflow capacity compared to wrapped and pleated versions, while maintaining low initial pressure drop and residual oil content, within a compact footprint.

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Pleated AOS

Pleating the filter media during manufacture increases surface area for improved sep... Pleating the filter media during manufacture increases surface area for improved separation and longer service intervals. On average, these variants handle up to twice the airflow versus conventional wrapped separators, without compromising oil carryover control.

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Spin-on AOS

An economical, easy-to-maintain separator option for systems with lower line press... An economical, easy-to-maintain separator option for systems with lower line pressure and minimal surges. The design, with a head mounted directly in-line with the piping and a cartridge containing a filter element, seals securely to prevent leakage and supports quick replacement with no special tooling.

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Select the right AOS format

Products at a glance

Format

Best for

Flow direction

Key advantage

Why buyers choose it

Wrapped

Standard performance + consistent separation

Outside → inside

Stable performance across applications

Reliable service life with strong oil aerosol removal

Depth

Higher oil aerosol load + compact design

Outside → inside

Higher airflow capacity

Handles heavier conditions while maintaining low pressure drop

Pleated

Higher airflow demand + longer intervals

(Application-specific)

Increased surface area

Up to 2× airflow capacity vs. conventional wrapped designs

Spin-on

Low pressure systems + easy service

Inline head + cartridge

Quick replacement

Economical option with no special tooling

*Note: Compatible across screw-type and sliding vane compressors depending on application/fitment.

Reasons to Choose Ashra Air-Oil Separator Filters

Sub-micron level coalescence separation

Micro-glass fiber coalescing media reduces oil aerosols and vapors, keeping compressed air cleaner and oil loss under control.

Application-fit designs for real compressors

Wrapped, depth, pleated, and spin-on options support screw-type and sliding vane compressors so you don’t force-fit generic separators.

Optimized airflow with low pressure

Especially in depth and pleated variants, engineered for higher airflow capacity while maintaining low initial restriction.

Protection for downstream systems

Reduced oil carryover means cleaner air networks, improved efficiency, and reduced risk of contamination-related equipment issues.

Made with engineering control and validation

Manufactured with in-house expertise and supported by Ashra’s R&D and 40+ year filtration legacy, built to deliver consistent, repeatable performance.

Check Out Our Product Literature

Air-oil separator filters for Cummins

Air-oil separator elements exploit the phenomenon of coalescence, using micro-glass fibre layers to remove droplets of oil from the compressed air. This filtration process is effective right down to the sub-micron range, to keep oil consumption and oil entrainment into the compressed air networks to a minimum.

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Ashra Air-Oil Separator Technology

Air Cleaner Options for Cummins engines

Air Cleaners suitable for off-highway applications

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FAQs on Ashra’s AOS

What is a Sepracore Engineered AOS System and why is it used?

A Sepracore Engineered AOS System removes oil aerosols and vapours from compressed air after compression. It helps reduce oil carryover into air networks, improves air cleanliness, and lowers compressor oil consumption.

What filtration principle do Ashra Sepracore Engineered AOS Systems elements use?

Ashra Sepracore Engineered AOS Systems elements use coalescence, where oil droplets merge within micro-glass fibre media and separate from the compressed air stream, enabling fine separation down to sub-micron levels.

Which compressors are Ashra Sepracore Engineered AOS Systems filters compatible with?

Ashra Sepracore Engineered AOS Systems filters are suitable for screw-type and sliding vane compressors, with multiple AOS variants designed to match different flow directions and operating requirements.

What’s the difference between wrapped, depth, and pleated Sepracore Engineered AOS Systems elements?

Wrapped elements use a tightly wrapped coalescence media structure with consistent pore sizing, designed for stable separation performance across a wide range of standard operating conditions. They’re a strong all-round choice for reliable efficiency and service life.
Depth elements use multiple grades/layers of glass fibre media built into a deeper structure. This design holds more oil aerosols and contaminants within the media while maintaining a low initial pressure drop, making it well-suited for heavier oil aerosol loads and compact fitment needs.
Pleated elements add pleating to the media during manufacturing, increasing the available surface area. More surface area supports higher airflow handling and extended service intervals without compromising separation performance, especially in applications with higher air demand.

Why is low pressure drop important in a Sepracore Engineered AOS System filter?

Low initial pressure drop reduces restriction in the compressor system, supporting better airflow efficiency and helping maintain stable system performance over the service life of the separator.

How do I choose the right Sepracore Engineered AOS System element for my compressor?

Selection depends on compressor type, flow rate, pressure conditions, aerosol load, and operating environment. Ashra can recommend the right AOS configuration based on your compressor model and application.

Want to know the right Sepracore Engineered AOS Systems for your compressor?

Share your compressor model and operating conditions to get the right AOS recommendation.

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order online.

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Our Products

Industries we serve

Our Products

Industries we serve

For AOS, choose Ashra.

For AOS, choose Ashra.

A legacy of AOS excellence.

A legacy of AOS excellence.