Maximize Efficiency and Safety with HEPA Vacuum for Walnut Shell Blasting Recovery

Turn Your Blasting Cleanup into a Competitive Advantage

Walnut shell blasting is widely recognized as one of the safest and most environmentally friendly methods for cleaning delicate surfaces. From aerospace components to automotive engines, it delivers powerful results without damaging underlying materials.

But there is one challenge many operations still face: efficiently recovering blasting media while maintaining a clean, safe workspace.

The solution? Heavy-duty HEPA vacuum systems designed specifically for blasting media recovery.

The Hidden Cost of Inefficient Media Recovery

Without the right recovery equipment, walnut shell blasting can quickly lead to:

  • Excessive material waste
  • Increased labor time for cleanup
  • Airborne dust exposure
  • Cross-contamination in sensitive environments

Over time, these issues translate into higher operational costs, safety risks, and reduced productivity.

A smarter recovery strategy does not just solve these problems—it transforms your entire process.

Why HEPA Vacuums Are a Gamechanger

A Heavy Duty HEPA vacuum is more than just a cleanup tool. It is an essential part of a modern, efficient blasting operation.

● Capture More, Waste Less

High-performance suction allows you to recover walnut shell media quickly and efficiently, making reuse possible and reducing overall consumption.

● Protect Your Workforce

Advanced HEPA filtration captures fine dust particles, improving air quality and helping create a safer working environment for your team.

● Maintain Clean, Controlled Workspaces

Whether you are working on a shop floor or a highly regulated facility, HEPA vacuums help prevent contamination and maintain compliance.

● Reduce Downtime

Faster cleanup means less interruption between blasting cycles—keeping your operations running smoothly.

Built for Demanding Industrial Environments

Not all vacuums are created equal. Heavy Duty HEPA systems designed for blasting applications offer:

  • Industrial-strength construction for durability in harsh environments
  • High-capacity collection systems to handle large volumes of media
  • Multi-stage filtration for superior dust containment
  • Strong airflow and suction power for dense material recovery

These features ensure consistent performance even in the most demanding conditions.

Ideal for a Wide Range of Applications

Industries that rely on walnut shell blasting can benefit immediately from improved recovery solutions:

  • Aerospace – Maintain strict cleanliness standards while protecting sensitive components.
  • Automotive – Safely remove carbon buildup and contaminants.
  • Power Generation – Control dust and maintain operational efficiency.
  • Manufacturing – Support cleaner for high concentrations of fine dust material.

Improve Sustainability While Cutting Costs

Recovering and reusing walnut shell media is not simply good practice, it is good business.

With the right HEPA vacuum system, you can:

  • Reduce material waste.
  • Lower disposal costs
  • Minimize environmental impact.
  • Support corporate sustainability goals.

It is a simple upgrade that delivers measurable returns on investment.

The Bottom Line: Smarter Recovery Starts Here

If walnut shell blasting is part of your operation, your recovery system should work just as hard as your blasting equipment.

A Heavy Duty HEPA vacuum solution gives you the ability to:

►Improve efficiency
►Enhance workplace safety
►Reduce operating costs
►Maintain compliance

Take Control of Your Blasting Process

Do not let cleanup slow you down or cut into your margins. Upgrade to a heavy-duty HEPA vacuum system and turn media recovery into a powerful advantage for your business.

Neal Raker, Application Engineering Manager
nealraker@exair.com

Informal Video: How to Change the HEPA Filter on an EXAIR Heavy Duty HEPA Vac

The HEPA filter inside the Heavy Duty HEPA Vac System has a 99.97% efficiency at 0.3 micron. It will contain very fine dust inside the drum and not back into the atmosphere. When the filter gets plugged, you will need to change it. In this video, I go through the steps for installing a new HEPA filter.

John Ball
Application Engineer
Email: johnball@exair.com
Twitter: @EXAIR_jb

Dynamic Viscosity and Kinematic Viscosity

Dynamic viscosity is the frictional force between the liquid layers.  It is measured with a viscometer that uses mechanical rotational resistance to discs that are placed in the fluid.  They have the units of Centipoise (cP) or Pascal-second (Pa-s).  Kinematic Viscosity removes the density to see how the behavior of the fluid flows.  This type of viscosity is measured with funnels or tubes to see how long gravity will pull the fluid through under its own weight.  The units for this type of viscosity are Centistokes (cSt) or M2/sec. Both types of viscosities are easily changed with temperature.  To convert the kinematic viscosity to dynamic viscosity, you only need to divide the dynamic viscosity by the fluid’s density in grams per cubic centimeter (g/cm³), reference Equation 1.  Because the density changes with temperature, the conversion is fluid specific.  Why do I bring this up?  If you are looking to transfer different fluids, EXAIR has a solution for you.    

Equation 1:

Kinematic Viscosity = Dynamic Viscosity / density

Not all liquid vacuums are the same.  Have you seen motor burnout, loud noises, single directional flow, and potential electrical hazards?  EXAIR manufactures a pneumatic venturi pump to remove all those issues, the High Lift Reversible Drum Vac System.  It does not have any moving parts to wear; a two-way action to fill or expel liquid from standard drums; and is quiet.  They only use compressed air to generate a powerful vacuum to lift liquid into a drum; and with a simple twist of the knob, it will push the liquid out.  And by using compressed air, no electricity is required, making it safe to use.  They work great for fluid transfers or liquid spills, and the High Lift Reversible Drum Vac can fill a 55-gallon (208L) drum in 85 seconds from 15 feet of lift.  And with the powerful vacuum pressure, it can move thick liquid with viscosity up to 1400 Cp through 20 feet (6m) of hose.  How can this product be useful for you?  If you work with liquids in a cistern, underground tanks, higher viscous fluids, or pits, EXAIR has a product for you; the High Lift Reversible Drum Vac System.  They are reliable and simple to use, and that is why it was awarded the 2015 Product of the Year by Plant Engineering.  In this blog, I will go over the specifications and packages that EXAIR offers.

The High Lift Reversible Drum Vac pump has stainless steel construction for corrosion resistance.  It comes with a built-in safety relief valve to avoid over pressurizing and an internal float to stop any over-filling of the drum.  The air consumption is only 43 SCFM (1,218 SLPM) at 80 PSIG (5.5 Bar), and it has a quiet noise level of only 83 dBA.  Systems are available in 30-, 55- and 110-gallon capacities (114L, 208L, and 418L respectively) in different packages.

The standard package will include the two-way pump assembly, shutoff valve, 20′ (6m) vacuum hose, a 90° quick release elbow, a standpipe, and an aluminum chip wand.  The standpipe is cut to length for the properly sized drum (the drum is not included in this option).  The standpipe extends inside the drum to remove as much liquid as possible when emptying. 

The Deluxe package will include all the items shown above in the Standard package and adds a drum dolly, ABS spill recovery kit, (2) extension wands, crevice tool, skimmer tool and a magnetic toolholder.

The Premium package will include all the items in the Standard package and adds the drum with lock ring and lid, drum dolly, ABS spill recovery kit, (2) different lengths, aluminum crevice tools, skimmer tool, a magnetic toolholder and a 20′ (6m) compressed air hose.

With the relationship between dynamic and kinematic viscosities, you can determine the best EXAIR Industrial Housekeeping Product to transfer or discard.  If you have any questions about the High Lift Reversible Drum Vac System, you can contact an Application Engineer at EXAIR.  We will be happy to help you.

John Ball
Application Engineer
Email: johnball@exair.com
Twitter: @EXAIR_jb

The Ultimate Guide to the EXAIR Heavy Duty HEPA Vac

In high-dust industrial environments, ordinary electric shop vacs often fall short. They clog quickly, motors burn out from constant use, and they can even return fine particles back into your breathing air. The EXAIR Heavy Duty HEPA Vac offers a rugged, air-powered alternative designed specifically for these harsh conditions.

What is the EXAIR Heavy Duty HEPA Vac?

The EXAIR Heavy Duty HEPA Vac is a powerful industrial vacuum that turns an ordinary 30, 55, or 110-gallon open-top drum into a high-capacity HEPA-grade cleaning system. Unlike standard vacuums, it has no moving parts and uses only compressed air to generate a powerful vacuum, reaching levels of -60” H2O at 80 PSIG.

Key Benefits for Industrial Cleanup

  • Maintenance-Free Durability: With no motors to wear out or bearings to fail, this system is built to last for years rather than months. Its hardened steel alloy construction specifically resists abrasion from heavy materials.
  • Certified HEPA Filtration: Every filter is tested to meet HEPA standards, capturing 99.97% of particles as small as 0.3 microns. This ensures that fine dust and contaminants stay in the drum and out of the air.
  • Safety First: Operating on compressed air eliminates the risk of electric shock. It also includes a static-resistant hose to prevent painful shocks when handling dry, dusty materials.
  • Quiet Operation: At only 82 dBA, it is roughly half as loud as many electric vacuums, creating a safer and more comfortable work environment.

Popular Applications

This vacuum is ideally suited for:

  • Abrasive Media: Handling shot blast media, sand, and steel shot without internal wear.
  • Fine Dust Control: Ideal for drywall refinishing, pulverizer maintenance, and mold removal.
  • Critical Cleaning: Removing allergens, industrial contaminants, and irritants from shop floors.

Available Systems

EXAIR offers three main system configurations to suit your facility’s needs:

  • Standard System: Includes the vacuum generator, lever lock lid, filters, and hoses.
  • Deluxe System: Adds a drum dolly and a variety of heavy-duty aluminum cleaning tools like wands and floor tools.
  • Premium System: Includes everything from the Deluxe package plus a 30, 55, or 110-gallon drum.

Pro Tip: To extend the life of your HEPA media, consider the optional Model 901373 filter protector, which slides over the filters to trap larger particles before they reach the main media.

If you would like to discuss whether EXAIR’s Heavy Duty HEPA Vac would be a good fit for your application, give us a call!

Al Wooffitt
Application Engineer

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