Air Compressor Intake Filters vs Inline Filters

Intake Filters

Intake filters (also called inlet filters) filter the ambient air before it goes through the compression process. This filter is the first piece of your compressor that will encounter the air. Because of this, the rest of the compressor system relies on it to be able to pull the air in and pull out the larger pieces of particulate that may try to sneak in. This helps to clean the air prior to compression and helps protect the internal components of your compressor. Most models come with an intake filter already installed, but if you find that your compressor is missing one, it is essential to get an intake filter installed immediately.

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Inline Filters

Inline filters are used after the compression process to remove particles, aerosols, oil vapors, and other contaminants before the pressurized air is released for use. These filters are used to ensure no contaminants enter your production process. Inline filters must be purchased separately and added to your compressed air system, positioned after the air compressor itself. There are multiple kinds of inline filters you can purchase dependent on the contaminants that need to be removed and your applications. Below are the three most common inline filters:

• Particulate Filters

  • Particulate filters remove the larger, coarse, solid particles from the air. Examples of contaminant they remove include dirt, pollen, metallic elements, cottonwood, and dust. This is done by filter material trapping and holding the particulate as the air passes through. Because it holds onto the particulate, this filter element must be replaced every few months.

• Coalescing Filters

  • Coalescing filters attack the finer particles that are a single micron in size or smaller. In general, they can filter out water, oil, aerosols, and other fluids but cannot stop vapors. Instead of the filter material trapping these particles, the filter material causes the small liquid droplets to stick together and form larger drops. These larger drops fall to the bottom of the filter where they are drained out. These filter elements should also be changed every few months due to some excess solid particles slipping through and building up, causing a block to the clean air flow.

•  Activated Carbon Filters

  • Activated carbon filters utilize adsorption to remove gases and vapors from the compressed air stream. Adsorption utilizes a specific media filter that encourages the vapors to bond and stick together, catching them as the air gets cleaned and passes through. These filters use activated carbon or charcoal to collect and remove the contaminants. These filters also need to be replaced every few months due to some of the finer charcoal particles eventually coming loose and causing risk of entering the clean airstream.

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Inline filters protect systems and equipment from damage by removing harmful particles, contaminants, and debris from the media that passes through them. Ideal for applications that require a compact filter size and direct flow capabilities, these filters maintain the purity of liquid and have varying filtration levels for application-specific needs.

Inline Air Filters

No matter the application, clean air is important to maintain safe and efficient processes. Though inline air filters are available in sizes ranging from miniature to extra large, at Air Logic, we specialize in miniature and small filters. As contaminants like pollen, dust, machining chips, and Teflon tape enter the system, they are captured by the inline filter, and clean air can be used in the system.

Our filters are suitable for use within devices or in single-use applications, particularly those requiring direct flow through the filter or compact filter sizes. For critical device components, inline filters can be used in conjunction with larger filters, providing finer debris filtration to protect important components.

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Benefits of an Inline Air Filter

Air Logic inline filters offer safety, efficiency, and convenience to applications in a range of industries. Our filters don’t require mounting, allowing for quick, simple installation.

They also provide the following additional benefits:

• Improved product quality: For manufacturing processes that require consistently clean air, inline air filters make this possible. Specifically, these filters protect against certain fine particles and debris that might otherwise damage systems such as semiconductors or contaminate medical devices or life science systems.
• Removal of airborne leftovers: Certain airborne leftovers produced during manufacturing processes may cause harm to critical system components, processes, employees, and operations. Inline air filters can remove these leftovers to create a safer environment, a more reliable device, and reduce premature product failure.
• Protection for tools: Dirty air has the potential to cause damage to critical equipment, resulting in delayed production times and customer dissatisfaction. Air filters help maintain compressed air tools, ensuring they stay in good working condition by protecting them from potential contaminants that could otherwise cause damage to tools.

Industry Uses of Inline Air Filters

Many industries use inline air filters for their systems. Air Logic offers a range of filters suitable for the following industries:

• Military Industry
• Energy Industry
• Food & Beverage Industry
• Petrochemical Industry
• Pharmaceutical Industry
• Medical Device Industry
• Life Sciences (including certain medical devices)

Inline Filter Specifications

To suit the requirements of a diverse range of applications, our inline filters are available with barbed or threaded connections and feature varying specifications. These include:

Filter Size (µm)

• 5
• 25
• 43
• 73

Tubing Inside Diameter (ID) (in)

• 0.170
• 1/16
• 1/8

Wetted Materials

• Polysulfone (PSU)
• Stainless Steel (SS)

Inline Air Filters from Air Logic

At Air Logic, we carry a wide variety of inline filters for the dental industry and many others. Some of the specific types of inline filters we carry include:

• Barbed Inline Filters: Air Logic offers a selection of barbed inline filters  that are low profile, lightweight, and capable of fitting into the tightest design envelopes.
• Threaded Inline Air Filters: These inline filters provide protection for sensitive devices against contamination in liquid or pneumatic circuits.

Determining the appropriate filtration solution relies heavily on the unique needs of your equipment and processes. Contact us today for filtration samples or assistance in designing your next project using compressed air systems.

Get Top-Quality Inline Filters and More at Air Logic

For reliable inline filters and other filtration equipment, Air Logic has the solution for nearly any application. In addition to high-quality inline filters, we offer a range of flow controls, check valves, fittings, and more, along with custom products based on your needs.

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