Author: Jordan T Shouse

How the Coanda Profile Drives Efficiency in EXAIR Products

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In compressed air applications, efficiency often comes down to how effectively you use the air you already have. One of the most important aerodynamic principles that allows modern air-powered devices to operate efficiently is the Coanda Effect. This phenomenon is the foundation behind several EXAIR engineered products, enabling powerful airflow while minimizing compressed air consumption.

Understanding how the Coanda profile works can help engineers and plant managers optimize processes such as drying, cooling, cleaning, and conveying.

Compressed air flows through the inlet (1) to the Full Flow (left) or Standard (right) Air Knife, into the internal plenum. It then discharges through a thin gap (2), adhering to the Coanda profile (3) which directs it down the face of the Air Knife. The precision engineered & finished surfaces optimize entrainment of air (4) from the surrounding environment.

What Is the Coanda Effect?

The Coanda Effect describes the tendency of a fluid streamโ€”such as airโ€”to follow along a nearby curved surface instead of continuing in a straight line. As the air travels along this surface, it pulls surrounding air into the stream, creating a region of low pressure and dramatically increasing total airflow.

In simple terms:

  1. Compressed air exits a small opening.
  2. The air adheres to a curved surface (the Coanda profile).
  3. This creates a low-pressure area.
  4. Surrounding air is entrained, or pulled into the airflow.

The result is a much larger volume of moving air than the compressed air supply alone would create.

This principle was originally studied by aeronautical engineer Henri Coandฤƒ in the early 1900s while researching airflow over aircraft surfaces.

EXAIR Products That Use the Coanda Profile

EXAIR incorporates this aerodynamic design into several of its Intelligent Compressed Air Productsโ„ข.

1. Air Knives

EXAIR Air Knives use a Coanda profile to create a wide, high-velocity sheet of air across the entire length of the unit.

Examples include:

  • EXAIR Standard Air Knife
  • EXAIR Full-Flow Air Knife
  • EXAIR Super Air Knife

Inside these units, compressed air enters a plenum chamber and exits through a narrow slot. The air then follows the curved Coanda surface, turning approximately 90ยฐ and flowing down the face of the knife.

As the air moves along the profile, it entrains large volumes of surrounding airโ€”up to 30-40 parts ambient air for every 1 part of compressed air.

Common applications include:

  • Parts drying after washing
  • Conveyor cleaning
  • Web or sheet drying
  • Cooling components
  • Pre-paint blowoff

2. Air Amplifiers

Another product that relies heavily on the Coanda profile is the Air amplifier.

Super Air Amplifier Family

Example:

  • EXAIR Super Air Amplifier
  • EXAIR Adjustable Air Amplifier

Instead of producing a flat airflow like an air knife, air amplifiers generate a conical air stream. Compressed air flows across a circular Coanda profile that draws in large amounts of surrounding air.

This creates amplification ratios up to 25:1, meaning the airflow produced is far greater than the compressed air supplied.

Typical uses include:

  • Cooling hot parts
  • Ventilating smoke or fumes
  • Circulating air in enclosures
  • Removing heat from equipment

3. Air Wipes

EXAIR also applies the Coanda profile in a circular configuration for drying or cleaning cylindrical materials.

Super (left) and Standard (right) Air Wipes come in sizes from 1/2″ to 11″.

Example:

  • EXAIR Air Wipe
  • EXAIR Super Air Wipe

These devices create a 360-degree ring of air that surrounds rods, tubes, wires, or cables. As air follows the Coanda profile around the ring, it entrains surrounding air and produces a strong, uniform drying or blowoff action.

Applications include:

  • Drying wire or cable
  • Removing coolant from tubing
  • Cleaning rods or extrusions

The Coanda Effect might seem like a theoretical concept, but it has a very practical impact on industrial operations. By carefully designing curved surfaces that guide airflow and entrain surrounding air, EXAIR products turn a small supply of compressed air into a powerful and efficient airflow solution.

Whether drying parts, cooling electronics, or removing debris from a conveyor, the Coanda profile allows EXAIR products to deliver maximum performance with minimal energy use.

Jordan Shouse, CCASS

Application Engineer / Sales Operations Engineer

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EXAIR Industrial Housekeeping Product Line: A Complete Guide to Cleaner, Safer Facilities

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Maintaining a clean, safe, and productive industrial environment is critical to operational efficiency. From managing metal chips on the shop floor to recovering liquids from pits and reservoirs, effective housekeeping directly impacts worker safety, equipment longevity, and overall plant performance.

EXAIRโ€™s Industrial Housekeeping product line is engineered to meet these challenges using compressed airโ€“powered solutions that are rugged, reliable, and designed specifically for industrial environments.

Industrial facilities generate a wide range of wasteโ€”dust, debris, metal chips, coolants, and liquidsโ€”that must be removed quickly and safely. Poor housekeeping can lead to:

  • Slip, trip, and fall hazards
  • Equipment damage or contamination
  • Reduced productivity
  • Increased maintenance costs
  • OSHA and safety compliance risks

Industrial Pneumatic Vacuums

At the core of the line are EXAIRโ€™s air-powered vacuum systems, which use the Venturi principle to create strong suction with no motors or moving parts. This reduces maintenance while allowing safe use around liquids.

Key systems include:

  • EasySwitchยฎ Wet-Dry Vac โ€“ Quickly converts between liquid and solid cleanup; ideal for coolant recovery and spills.
  • Chip Vacโ„ข โ€“ Designed for machining environments to collect chips directly from mills and CNCs.
  • Heavy Duty Dry Vacโ„ข โ€“ Handles abrasive materials like steel shot, sand, and sawdust.
  • Heavy Duty HEPA Vacโ„ข โ€“ Provides 99.97% filtration for fine or hazardous dust.
  • High Lift Chip Trapperโ„ข – Systems recover coolant while filtering out chips. They can lift liquids from pits or tanks, helping extend coolant life and reduce disposal costs.
  • Chip Trapperโ„ข – Systems recover coolant while filtering out chips, helping extend coolant life and reduce disposal costs.
  • Reversible Drum Vacยฎ โ€“ A two-way liquid transfer system that can fill or empty a 55-gallon drum in under two minutes using compressed air. Ideal for coolant pits, wastewater, spills, and liquid transfer without pumps or electricity.

EXAIRโ€™s Industrial Housekeeping line delivers rugged, low-maintenance solutions for removing chips, dust, and liquidsโ€”helping facilities operate cleaner, safer, and more efficiently. They all deliver several key benefits: safer cleanup without electricity, minimal maintenance (no motors or impellers), fast debris and liquid removal, coolant recovery and cost savings, OSHA-compliant safety and noise levels.

If you think an EXAIR vacuum can help your facility but don’t know which one, give me a call. I’d be happy to help get the right solution pick out with you.

Jordan Shouse, CCASS

Application Engineer / Sales Operations Engineer

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Compressed Air Is Powering the Energy Transition โ€” Not Just Manufacturing

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A major breakthrough just hit the industry: researchers unveiled the worldโ€™s most powerful single-unit compressed air energy storage (CAES) compressor, rated at 101 MW.

  • Achieves ~88% efficiency at max discharge pressure
  • More than doubles the power of prior single-unit CAES compressors
  • Designed to store energy by compressing air for later electricity generation

This positions compressed air not just as a plant utilityโ€”but as a grid-scale energy storage solution.

From Shop Air to Grid Power

For decades, compressed air has been known as the โ€œfourth utilityโ€ of manufacturingโ€”powering tools, automation, conveying systems, and production lines across nearly every industrial sector.

But today, compressed air is stepping into a much larger role.

Recent breakthroughs in compressed air energy storage (CAES) technology are transforming compressed air from a plant-floor necessity into a grid-scale energy solution. Massive new compressor systems are now capable of storing surplus renewable energy and releasing it back into the electrical grid when demand spikes.

In other words, compressed air isnโ€™t just powering production anymoreโ€”itโ€™s helping power the future of energy.

What Is Compressed Air Energy Storage (CAES)?

Compressed Air Energy Storage is a method of storing energy for later useโ€”similar in purpose to batteries, but very different in scale and operation.

Hereโ€™s how it works:

  1. Energy Capture
    Excess electricityโ€”often from renewable sources like wind or solarโ€”is used to power large compressors.
  2. Air Compression & Storage
    The compressed air is stored in underground caverns, tanks, or geological formations.
  3. Energy Release
    When electricity demand rises, the stored air is released, heated, and expanded through turbines to generate power.

Why CAES Matters

Renewable energy plays a critical role in the global shift toward sustainability, but it comes with a fundamental challenge: intermittency. Solar power only generates electricity during daylight hours, wind output fluctuates based on weather conditions, and grid demand changes constantly throughout the day. This mismatch between energy production and consumption creates reliability challenges for utilities. Compressed Air Energy Storage (CAES) helps solve this issue by capturing excess energy when supply is high and releasing it when demand spikes. The technology provides long-duration energy storage, supports grid stabilization, helps meet peak demand, and reduces reliance on fossil fuel peaker plants. While lithium-ion batteries currently dominate short-term storage solutions, compressed air stands out for its ability to store massive volumes of energy over longer periodsโ€”making it especially well suited for utility-scale applications.

A Breakthrough Moment for Compressed Air

Recent advancements in high-capacity compressors designed specifically for energy storage are pushing the boundaries of what compressed air technology can achieve. These next-generation systems deliver unprecedented compression power, achieve significantly higher efficiency levels, and are engineered to support renewable energy integration at grid scale. By reducing energy loss during compression and discharge cycles, they make large-scale air storage more practical and economically viable than ever before. This innovation marks a turning point for the industry: compressed air is no longer confined to manufacturing facilitiesโ€”it is now being positioned as a core component of national energy infrastructure planning and the broader transition to renewable power.

Jordan Shouse, CCASS

Application Engineer / Sales Operations Engineer

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Schematic of the compressed air energy storage method courtesy of (Image: https://voltatechnique.com/technology/) Creative Commons License

Cold Guns vs. Coolant: Choosing the Right Cooling Solution for Your Machining Application

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In machining environments, temperature control isnโ€™t optionalโ€”itโ€™s essential. Excess heat reduces tool life, warps materials, slows production, and increases scrap rates. Traditionally, shops have relied on liquid coolant systems to manage these challenges. But as processes evolve and industries push for cleaner, safer, and more efficient operations, EXAIR Cold Guns have become a compelling alternative.

So how do Cold Guns stack up against traditional coolant? Letโ€™s break it down.

What Makes an EXAIR Cold Gun Different?

An EXAIR Cold Gun uses a vortex tube to convert compressed air into a focused stream of cold air. There are no moving parts, no chemicals, and no maintenance-heavy equipment like pumps or filters. Once installed, it simply delivers reliable coolingโ€”often dropping air temperatures as low as 20ยฐFโ€”to keep tools and work pieces from overheating.

The appeal is simplicity: clean, dry cooling without the mess that comes with managing coolant.

Cooling Performance: Cold Air vs. Liquid Coolant

Liquid coolant still holds an advantage in applications that rely heavily on lubrication. Operations like deep pocket milling, tapping, or cutting difficult metals benefit from the coolantโ€™s ability to both cool and lubricate the cut.

Cold Guns excel where pure cooling is the priority. For grinding, engraving, routing, plastics machining, and many dry-cutting processes, the Cold Gun delivers consistent, targeted cooling that improves tool life and part finish without introducing moisture or chemical residue. For many shops, that alone makes it a better fitโ€”especially when contamination is a concern.

Cleanliness, Maintenance, and the Work Environment

Coolant brings with it a certain level of maintenance. Tanks have to be cleaned, concentration levels must be monitored, and filters, pumps, and lines require regular attention. On top of that, coolant mist can create slippery floors and lingering odors and can irritate skin or eyes.

A Cold Gun eliminates these issues entirely. The cooling air is clean, dry, and chemical-free. Thereโ€™s no mist to manage, nothing to wipe down, and no system to maintain. For applications involving electronics, wood, plastics, food-grade parts, or any material sensitive to contamination, this alone often decides the debate.

Cost of Ownership and Long-Term Value

Coolant systems can become expensive over timeโ€”not necessarily because of the initial installation, but because of everything required to keep them running. Disposal costs, replacement fluid, lost production during cleaning, and equipment upkeep all add up.

Cold Guns, by comparison, have almost no ongoing costs. They simply run on compressed air. With no moving parts to wear out and virtually no maintenance, they offer a predictable and low-cost long-term solution.

Every machining process is different, and choosing between a cold gun and coolant often comes down to the details of your setup. If youโ€™d like help evaluating your application, reach out anytime.

Jordan Shouse, CCASS

Application Engineer / Sales Operations Engineer

Send me an email
Find us on the Web