Compressed Air Nozzles – Engineered vs. Commercial vs. Homemade

In the world of compressed air blow off solutions, there are a number of options which customers must consider.  Should the plant maintenance personnel configure something on-site?  Is there a low-cost option available from a catalog warehouse?  Or, is there an engineered solution available – and if there is, what does this even mean?

Blowoff comparison

Ultimately, the exercise in comparing these options will help select the option best for the application and best for the company.  In order to make these comparisons, we will consider each option based on the following attributes:  Force, sound level, safety, efficiency, repeatability, and cost.  These are the factors which impact the ability to perform as needed in the application, and effect the bottom line of the company

Force

How much force do you need in your application?

Blow off applications require a certain amount of force in order to perform the desired task.  If the blow off is in a bottling line, for example, we will aim for a lesser force than if blowing off an engine block.  But, no matter the application need, we will want to consider the ability of the solution to provide a high force, high impact blow off.  Homemade and commercially mass-produced nozzles produce low-to-mid level forces, which translates to a need for more compressed air to complete a task.  Engineered nozzles produce high forces, minimizing compressed air use.

Sound level

Have you ever been to a concert and felt your hearing reduced when you left?  This can be the case for personnel in industrial environments with unregulated noise levels.  Homemade or non-engineered blow off solutions carry the risk of increased sound levels which are outside of the acceptable noise level limits.  EXAIR engineered nozzles, however, are designed to minimize sound level for quiet operation and continual use.

Safety

All EXAIR products meet or exceed OSHA Standard 29 CFR 1910.242(b)

Workplace safety is a serious matter for everyone from shop floor personnel to executive management.  Whether you’re working with or near a compressed air operated device, or your making decisions for your company which have to do with the compressed air system, safety is undoubtedly a priority.  Unfortunately, homemade and commercially available nozzles normally fail to meet OSHA standards for dead-end pressure requirements (OSHA Standard 29 CFR 1910.242(b)).  This means that these solutions can pose a risk of forcing compressed air through the skin, resulting in an embolism which can cause severe harm or even death.

EXAIR nozzles, however, are designed to NEVER exceed dead-end pressure limits and to provide an escape path for airflow in the even the nozzle is blocked.  This safety aspect is inherent in ALL EXAIR designs, thereby adding safety to an application when an EXAIR product is installed.

Efficiency

EXAIR Super Air Nozzle entrainment

Compressed air is the most expensive utility in any facility.  Energy enters as an electrical source and is converted into compressed air through a compressor where up to 2/3 of this energy is lost as heat.  The resulting 1/3 of converted energy is then piped throughout a facility as compressed air, where up to 1/3 of the air is lost to leaks.  With this in mind, maximizing the efficiency of a nozzle solution becomes imperative.  A homemade solution or commercial nozzle does not maximize the use of the compressed air.  The result is a need to increase flow or increase pressure, both of which result in higher energy costs.

EXAIR nozzles are designed for maximum force per CFM.  This means that any of our nozzles will produce the highest force at the lowest possible compressed air consumption.  This, in turn, reduces demand on the compressed air system and allows for a lower energy requirement.  Less energy demand means less energy costs, which goes straight to the bottom line of your company.

Repeatability

The EXAIR family of nozzles

When installing a nozzle solution, it is important to have the same force and flow from each unit.  If a solution needs to be replicated, balanced, or adjusted in any way, having various forces and flows from a homemade setup will induce difficulty and could make changes impossible.  Line speed or volume increases may not be possible due to variance in the output flow and forces from homemade setups, but an engineered solution will produce the same output every time.  This means you can adjust the nozzles as needed to achieve the perfect solution in your application.

Cost

For many customers and businesses, the most important aspect of any solution comes down to cost.  Will the solution work?  And, how much does it cost?  When it comes to a homemade or commercial blow off solution, it may or may not work, and it will have a low purchase cost.  But, the purchase price isn’t the whole story when working with compressed air.  The real cost of an item is in the operation and use.  So, while a homemade solution will be cheap to make and install, it will be EXPOENTIALLY more expensive to operate when compared to an engineered solution.  An excellent example is shown above.  An open copper tube is compared to an EXAIR model 1102 Mini Super Air Nozzle.  The copper tube cost only a few dollars to install, many times less than the EXAIR nozzle, but it costs almost two THOUSAND dollars more to operate in a year.  Translation:  Install a cheap blow off solution and pay for it in utility costs.

EXAIR nozzles and blow off solutions are engineered for maximum force, lowest possible noise level, OSHA safety compliance, maximum efficiency, and maximum repeatability.  These factors allow for options which not only solve application problems, but also do so with the lowest total cost possible.  If you have an application in need of a blow off solution, feel free to contact our Application Engineers.  We’ll be happy to help.  And, if your curious about the benefit of our products in your application, consider our Efficiency Lab.  We will test your existing setup next to our recommended EXAIR solution and provide the impact to your bottom line.

Lee Evans
Application Engineer
LeeEvans@EXAIR.com
@EXAIR_LE