Improve Noise Exposure with EXAIR Flat Super Air Nozzles

EXAIR manufactures a variety of nozzles that are OSHA safe, high quality, and very efficient.  They are engineered to entrain the “free” ambient air into the air stream to create a powerful force while reducing compressed air usage.  Thus, saving you money.  With a multitude of blow-off applications like clearing small holes to quickly cleaning gantries on CNC tables, EXAIR has the nozzles for you.  In this blog, I will discuss the features and benefits of the EXAIR Flat Super Air Nozzles.    

The EXAIR Flat Super Air Nozzles are manufactured to blow a wide forceful stream of air.  Their patented design creates a high velocity, laminar air stream with minimal air consumption and low noise.  They come in two widths; 1” (25mm) and 2” (51mm).  EXAIR offers a standard Flat Super Air Nozzle and a High Power Flat Super Air Nozzle in two different materials, zinc-aluminum alloy and 316 stainless steel.  And with a metal construction, breakage is not a concern and performance are not sacrificed even in the harshest of environments. 

The unique patented shims used with the EXAIR Flat Super Air Nozzles will give you three improvements to the design and function.  First, they come in different thickness to create a wide range of forces.  In conjunction with a regulator, you can “dial” in the correct amount of force from a breeze to a blast without overusing your air compressor.  The patented shim also allows an even flow across the entire width of the air nozzle.  Unlike the plastic flat nozzles that use holes which generates a fluctuation of forces across the width.  Lastly, they help to entrain the free ambient air; so that less compressed air is required.  The high efficiency design will save you money.  The EXAIR Flat Super Air Nozzles are effective in uniform blowing with safety and efficiency in mind. 

To expand more on safety, I will direct you to Noise.  With “open” holes in nozzles, the compressed air is turbulent and loud.  The National Institute for Occupational Safety and Health, NIOSH, states that 70% to 80% of all hearing loss within a manufacturing plant is caused by compressed air.  OSHA created a chart to show the maximum allowable noise exposure.  This chart shows the time and noise limits before requiring hearing protection.  The EXAIR Flat Super Air Nozzles are designed to have laminar flow which is very quiet.  As an example, the model 1122 2” Flat Super Air Nozzle has a sound level of only 77 dBA at 80 PSIG (5.5 bar); well under the noise exposure limit for 8 hours.   

With the EXAIR Flat Super Air Nozzles, you can take advantage of the durability, safety, and efficiency for your blow-off devices.  With automated systems, or machine builders, you may want to look at the EXAIR brand for your blow-off, cooling, and coating applications.  The overall cost of your system as compared to the cost of the nozzles should not warrant the use of poor-quality plastic nozzles to save a couple of dollars.  Because in the long run, it will actually cost you more with loss of production, compressed air waste, very loud noises, and unsafe work environments. 

EXAIR stocks these nozzles for quick delivery.  If you are within the U.S. or Canada, they come with a 30-day unconditional guarantee to try them out.  If you need any help with our Flat Super Air Nozzles or how to build an optimum blow-off system, you can speak to an Application Engineer at EXAIR.  We will be happy to assist you. 

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

Back Blow Air Nozzles Clean Inside Aluminum Extrusions

A manufacturing plant was using extruded aluminum structural framing for making benches.  After the aluminum parts were cut, they had coolant and chips inside the tube.  They tried to run a rag through the center to remove the material, but it wasn’t able to get into all the crevices and before long the rag was saturated.  Also, they noticed that the chips would scratch the internal surfaces.  For this company, quality was very important to represent their brand.  So, they were needing a non-contact way to clean the inside of these parts after sawing.   They contacted EXAIR as we share the same business facets of first-class customer service and great quality.

Back Blow Air Nozzle Family

At EXAIR, we design and manufacture nozzles for just this type of operation; the Back Blow Air Nozzles.  We offer three different sizes to fit inside a wide variety of diameters from ¼” (6.3mm) to 16” (406mm).  They are designed to clean tubing, pipes, hoses, channels, and extruded “odd” shapes.  The 360o rear airflow pattern can “wipe” without touching the internal surface to remove coolant and chips.  For the application above, I recommended the model 1006SS Back Blow Air Nozzle to fit inside the 1 ½” (38mm) opening.  The range for this Back Blow Air Nozzle is from 7/8” (22mm) to 4” (102mm) diameters.  This 316SS robust nozzle would last a long time without having to change or replace cloth rags.

After installing the model 1006SS onto an extension pipe, the cleaning operation became very easy and efficient.  After each cut, they would run the Back Blow Nozzle through the center with only one pass to clean.  The non-contact wiping removed the coolant and chips without marring the internal surface.  In addition, they were able to speed up their operation by 20%.  Cleaner tubes, less time, cost savings; they were happy that they contacted EXAIR for our expertise.

Model 1204SS-6-CS and 1206SS-6-CS

If you need to clean the inside of tubes, hoses, pipes, etc., EXAIR has the perfect nozzle for you, the Back Blow Air Nozzles.  EXAIR can also offer these nozzles on our VariBlast, Soft Grip, and Heavy Duty Air Guns for manual operations.  They come with Chip Shields and extensions that can reach as far as 72” (1829mm).  Or like the customer above, automate the system to get a great non-contact cleaning.  If you require any more details, 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

Two Important Safety Factors When Choosing Air Nozzles

At EXAIR, we have a statement, “Safety is everyone’s responsibility”.  And we also manufacture safe compressed air products.  In the United States, we have an organization called Occupational Safety and Health Administration, OSHA, that enforces directives for safe and healthy working environments.  They do training, outreach programs, and educational assistance for manufacturing plants.  They will also enforce these directives with heavy fines for violations.  The two most common violations with compressed air are air guns and blow-off devices are described in 29CFR 1910.242(b) for dead-end pressure/chip shielding and 29CFR 1910.65(a) for maximum allowable noise exposure.

Here is an example of a nozzle that is dangerous.  As you can see, there is only one opening where the air can come out from the nozzle.  Other types of nozzles that would fall into this same group would include copper tube, extensions, and open pipes.

Unsafe Nozzle

They are dangerous as the compressed air cannot escape if it is blocked with your body or skin.  If operated above 30 PSIG (2 bar), these nozzles could create an air embolism within the body which can cause bodily harm or death.  This is a hazard which can be avoided by using EXAIR Super Air Nozzles and Safety Air Guns.  The nozzles are designed with fins which allows the air to escape and not be blocked by your skin.  So, you can use the EXAIR Super Air Nozzles safely even above 30 PSIG (2 bar).

Unsafe Air Gun

To counteract the dead-end pressure violation, some nozzle manufacturers create a hole through the side of the nozzle (Reference photo above).  This will allow for the compressed air to escape, but, now the issue is noise level.  With an “open” hole in the nozzle, the compressed air is very turbulent and very loud.  The National Institute for Occupational Safety and Health, NIOSH, states that 70% to 80% of all hearing loss within a manufacturing plant is caused by compressed air.  OSHA created a chart to show the maximum allowable noise exposure.  This chart shows the time and noise limits before requiring hearing protection.  The EXAIR Super Air Nozzles, Super Air Knives, Super Air Amplifiers are designed to have laminar flow which is very quiet.  As an example, the model 1210 Safety Air Gun has a sound level of only 74 dBA; well under the noise exposure limit for 8 hours.

Hearing loss is the best known, but not the only, ill effect of harmful noise exposure. It can also cause physical and psychological stress, impair concentration, and contribute to workplace accidents or injuries.

NIOSH created an overview of how to handle hazards in the workplace.  They call it the Hierarchy of Controls to best protect workers from dangers.  The most effective way is by eliminating the hazard or substituting the hazard.  The least effective way is with Personal Protective Equipment, or PPE.  For unsafe compressed air nozzles and guns, the proper way to reduce this hazard is to substitute it with an engineered solution.

One of the last things that companies think about when purchasing compressed air products is safety.  Loud noises and dead-end pressure can be missed or forgotten.  To stop any future fines or additional personal protective equipment (PPE), it will be much cheaper to purchase an EXAIR product.  And with the Hazard Hierarchy of Controls, the first method is to remove any hazards.  The last method for control is to use PPE.  In the middle of the hierarchy is for an engineered solution.  EXAIR products are that engineered solution.  If you would like to improve the safety in your facility with your current blow-off devices, an Application Engineer can help you.

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

Picture:  Safety First by SuccoPixabay License

Atomizing Nozzles: Identification and Versatility

Internal Mix Atomizing Spray Nozzles

I recently was contacted by a customer that had an application for spraying silicone.  They currently were using our Atomizing Nozzles, and they were impressed with the operation.  But they needed to change the spray pattern for a different application.  They had a variety of parts which required different spray angles and liquid amounts.  With the EXAIR Atomizing Nozzles, the air and liquid caps are interchangeable with the same body size.  So, you can change liquid flow rates, spray patterns, and even go from a pressurized liquid system to a siphon fed.  I created an informal video that shows how this can be done (click HERE).  To start, this customer did not know which model number that they were using.  So, I had to determine the size and type in order to make the proper changes. 

To do the “forensics”, we need to know a couple of things.  First, we need to find the inlet air and liquid port sizes.  EXAIR offers three sizes in NPT or BSP; 1/8”, 1/4”, and 1/2”.  Then we would need to know if it is a standard or No-Drip option.  This is easily found by looking at the top of the Atomizing Nozzle.  A standard option has the liquid stem valve that has a knurled adjustment knob; while the No-Drip option has a cylinder in place of the liquid stem valve.  From the photo below, they were using the standard option. 

AF1010SS

Since they were pumping the silicone solution to the Atomizing Nozzle, the next step was to look at the Liquid Cap and the Air Cap.  EXAIR stamps characters on each Liquid and Air Cap (reference photo below).  The Liquid Caps will only have numbers, and the Air Caps will combine letters and numbers.  From these details, I could determine that the customer was using a model AF1010SS Internal Mix Flat Fan Atomizing Nozzle. 

For their next application, they were looking to spray more of the silicone solution at a smaller target area.  I recommended the model AN1030SS.  By changing the air and liquid pressure in conjunction with adjusting the liquid stem valve, they could dial in the exact amount of silicone spray to not overuse it.  For this customer, I was able to recommended to just replace the liquid and air cap to change from the model AF1010SS to the model AN1030SS. 

If you have a liquid that you would like to spray evenly, efficiently, and effectively; EXAIR Atomizing Nozzles can do that for you.  For the customer above, they did not have to purchase new units as they could just swap out the caps to make the change.  This saved the company money and time as the bodies of the Atomizing Nozzles were already aligned to cover both parts.  If you would like know more about our Atomizing Nozzles and the features that they provide, you can contact an Application Engineer at EXAIR.  We will be happy to help. 

John Ball
International Application Engineer

Email: johnball@exair.com
Twitter: @EXAIR_jb