I was recently contacted by a Chicken Farm in Canada about a blow off application for cleaning the dust and debris off the walls and ceilings in their barns. They currently use a 185 SCFM portable, engine driven compressor and a lance made from 3/4″ open copper tube. The barns are rather large, approximately 10′ high by 500′ long, and they place the compressor in the middle of the barn and have a 250′ length of hose going to the homemade blowoff. This setup worked fine for a minute or so but then the airflow would start to weaken at the point-of-use and the compressor would run continuously as it wasn’t able to maintain pressure to keep up with the demand of the copper pipe.
After discussing the details of the application, I recommend the customer use our Model # 1214-6 Super Blast Safety Air Gun with 6′ aluminum extension. This would reduce the air demand to 91 SCFM, more suitable for use with the existing 185 SCFM compressor.
The design of the Super Blast Safety Air Gun features a spring loaded manual valve, providing automatic shutoff and a comfortable foam grip. The 6′ extension provides the extra reach they need to effectively treat the walls and ceilings in the barn.
The Super Blast Safety Air Guns are ideal for wide coverage, long distance applications. They use our Large Super Air Nozzles and Super Air Nozzle Clusters, providing forces levels from 3.2 lbs. up to 23 lbs, depending on which nozzle is fitted on the assembly. Air inlets range from 3/8 FNPT up to 1-1/4 FNPT and aluminum extensions are available in 36″ or 72″ lengths.
If you have any questions or need further assistance, please contact an application engineer.
The following short video is a brief overview of our VariBlast Compact Safety Air Gun. The VariBlast Compact Safety Air Gun’s unique design features a variable flow trigger allowing you to achieve varying levels of force from the same nozzle.
If you have any questions, please contact an application engineer at 800-903-9247.
EXAIR offers 5 different styles of Safety Air Guns; Precision, VariBlast, Soft Grip, Heavy Duty and Super Blast. You can read more about the different styles of Safety Air Guns from a previous EXAIR blog “Not All Compressed Air Guns Are The Same” written by Justin Nichol. I will be targeting the accessories that can enhance the features of the EXAIR Safety Air Guns. These additions will make the Safety Air Guns more dynamic without sacrificing safety, efficiency, or durability.
OSHA 1910.242(b) requires chip guarding when compressed air is used for cleaning. EXAIR offers Chip Shields with our Safety Air Guns to meet this requirement. They are made from a polycarbonate disc which is practically unbreakable and protects the operator from any blow back of metal shavings or coolant. They come with a durable rubber grommet that squeezes onto the extensions and can be adjusted to maximize protection. We offer Chip Shields for the Precision, VariBlast, Soft Grip, and Heavy Duty Safety Air Guns with or without aluminum extensions.
For those far away targets and hard-to-reach areas, EXAIR offers aluminum extension pipes to attach to the Safety Air Guns. They can range from 6” (15 cm) to 72” (183 cm) in length. This light-weight and durable material allows for easy handling to reach high above your head or to span across unsafe areas. With the EXAIR air nozzles at the end, the blowing force is not sacrificed as the back pressure will generate a high velocity air stream. The aluminum extensions are offered with the Variblast, Soft Grip, and Heavy Duty Safety Air Guns. The Super Blast Safety Air Guns has the option for two different lengths of extensions, 3 feet (91cm) and 6 feet (183 cm).
In certain situations, you may need a way to blow air around a corner or in a tight space. The Stay Set Hose gives you that possibility of manually adjusting or re-adjusting the nozzles to target the correct areas. The hose has a “memory” function, and it will not creep or droop until you physically move it again. They come in lengths from 6” (15cm) to 36” (91cm), and they are offered with the Soft Grip and the Heavy Duty Safety Air Guns.
To get the proper amount of compressed air from the piping system to the Safety Air Guns, EXAIR offers a series of Coiled Hoses. They are made of a durable abrasion-resistant nylon material that is 12 feet long (3.6 meters). They have swivel fittings to allow for easy uncoiling, and a spring strain relief to keep the hose from kinking at the ends. The coiled design makes it easy to reach around the work area and retract back to the substation. This will help to keep the hose off the ground where potential dangers could occur. We offer 3 different connection sizes of 1/8” NPT, ¼” NPT, and 3/8” NPT. They can be used with our Precision, VariBlast, Soft Grip, and Heavy Duty Safety Air Guns. With the proper size, the Coiled Hoses can connect easily to the Safety Air Guns and supply the required amount of air with a minimal amount of pressure drop.
To improve the use of the Safety Air Guns, EXAIR offers a series of filters and regulators. The filters will remove dirty particles and liquid water from the compressed air that can affect the performance of the Safety Air Gun as well as contaminate the surface that you are cleaning. The regulators can control the amount of air pressure used for the Safety Air Gun; making them even more efficient. The idea for compressed air savings is to use the least amount of compressed air to do the job. If you only need 40 PSIG (2.8 Bar) to blow off an area, then you can save almost 40% of your compressed air as compared to doing that same job at 80 PSIG (5.5 Bar). The combination of a filter and regulator will allow you to control the proper amount of clean dry air to be used.
All of our Safety Air Guns are fitted with our engineered Air Nozzles which make them OSHA compliant for noise and dead-end pressure. With the accessories, you can optimize the use of the Safety Air Guns to better fit your application. If you need help in determine the correct Safety Air Guns and accessory items, you can contact an Application Engineer for help. If you are within the U.S. or Canada, you can take advantage of our 30-day unconditional guarantee to trial any of our stocked Safety Air Guns.
They say time flies when you’re having fun. Maybe that’s why I found it a little hard to believe it’s been almost two years since we introduced the Back Blow Air Nozzles. They’ve become yet another “textbook” solution to a great many applications:
*Our Model 1006SS 1/4 NPT Back Blow Air Nozzlewon Plant Engineering Magazine’s “Product Of The Year” Bronze Award in 2015, and are successfully employed in a wide range of uses:
Blowing out splined bores by a gear manufacturer
Quickly cleaning out spindles between tool changes by a CNC machinery operator
Removing the last bits of powder from spent toner cartridges by a printing equipment recycler
*The Model 1008SS 1 NPT Back Blow Air Nozzleis becoming famous in hydraulic cylinder repair shops…after a cylinder bore is honed, one quick pass of the powerful blast it produces cleans bores from 2″ to 16″. We can even put it on the Model 1219SS Super Blast Back Blow Safety Air Gun, with a 1ft, 3ft, or 6ft extension.
If you want to see how they work, check out this video:
I could have sworn Lee Evans just made that video, but apparently, it’s over a year old now. Time does indeed fly, and I promise we’re having fun! If you’d like to find out more about how a Back Blow Air Nozzle – or any of our engineered compressed air products (old or new) – can make your operations quieter, more efficient (and hence, probably, more fun,) give me a call.
The Super Blast Safety Air Guns are comfortable to hold with a soft foam grip. They’re safe to operate with all of the Super Blast Safety Air Guns incorporating EXAIR’s OSHA compliant nozzles and clusters. In addition, they also have a spring-loaded manual valve that will automatically shut off the compressed air if accidentally dropped.
The Super Blast Safety Air Gun is available with nine different styles of nozzle at the end. They are able to achieve a blowing force of anywhere from 3.2 lbs all the way up to 23 lbs when measured 12” away from the nozzle at an operating pressure of 80 psig. All while still adhering to OSHA directive 1910.242(b)!! Each of the Super Blast Safety Air Guns is also available with a 1’, 3’, or 6’ extension for hard to reach areas that still require a maximum blowing force. When compared to the same sized open-pipe blowoffs, the Super Blast Safety Air Guns represent a significant savings in air consumption.
In addition to the standard Super Blast Safety Air Guns, EXAIR’s 1008SS 1” NPT Back Blow Nozzle is also available as a Super Blast Gun. With a 360° airflow pattern, this gun is the ideal choice when trying to remove debris from large pipe diameters or deep channels.
If you have an application in your facility that requires a seriously strong blast of compressed air, give us a call. Our team of Application Engineers is ready to assist you in determining the appropriately sized Super Blast Safety Air Gun for your needs.
There are many inexpensive, cheaply made air guns out on the market. If evaluated solely on purchase price, the decision of what air gun to buy seems obvious. Only when you consider all the cost of ownership and operation, does the best direction become apparent.
A popular thumb lever operated air gun, readily available online has a base purchase price of $6.11. The List price of the EXAIR model 1210 Soft Grip Safety Air Gun is $81.00. Wow- big difference you think, I am surely not going to spend that kind of money on a simple air gun. Let’s take a look of the true cost of ownership for each of the guns.
We tested both the model 1210 and the other gun utilizing our Efficiency Lab service. We tested at 80 PSIG of supply pressure and measured and recorded air consumption, force and sound levels. Results of this testing is shown below.
From the test data, the other gun is able to provide 9% more force, but at a cost of 35% greater compressed air consumption, 5.64 SCFM more, along with an 18 dBA sound level increase (a sound level where hearing protection is needed, an additional cost to be incurred.)
If we examine the compressed air consumption, we can calculate the yearly compressed air usage, considering 4 hour per day of operation, 5 days per week, for 50 weeks out of the year.
A general rule of thumb for industry is that 1000 SCF of compressed air costs $0.25 to produce.
As you can see, after 1 year of operation the Soft Grip Safety Air Gun has already paid for itself with compressed air savings, not to mention significantly reduced sound levels, well within the OSHA Standard 29 CFR – 1910(a) for Maximum Allowable Noise Exposure. To read more about the OSHA Standard, see this EXAIR blog. An EXAIR Safety Air Gun will continue to bring you benefits after this ROI period, and includes many other feature you do not receive with the cheap air gun.
You get the EXAIR 5 Year Built to Last Warranty which covers defects in workmanship and materials. EXAIR’s safety air guns lead the way in standards and certification – we meet or exceed relevant OSHA standards, carry the CE mark and utilize a conflict mineral free supply chain. We offer (5) types of Safety Air Guns, all offering ergonomic, comfortable, lightweight operation.
Safety Air Guns are also available with optional Chip Shields and Extensions (in lengths of 6″ to 6′) along with many different nozzle sizes (2.5 SCFM to 460 SCFM of air flow) and a variety of materials (Zinc Aluminum alloy, Stainless Steel, brass and PEEK plastic) to allow the configuration of the best air gun for your application. EXAIR Safety Air Guns are great for use in applications ranging from light dust removal from delicate circuit boards to large scale, long distance, wide area blow off, cooling and drying applications and everything in between.
If you have questions regarding the Safety Air Guns, or would like to talk about any EXAIR Intelligent Compressed Air® Product, feel free to contact EXAIR and myself or one of our Application Engineers can help you determine the best solution.
Many times when we provide the air consumption of an EXAIR product, we get a response like…. “I’ve got plenty of pressure, we run at around 100 PSIG”. While having the correct pressure available is important, it doesn’t make up for the volume requirement or SCFM (Standard Cubic Feet per Minute) needed to maintain that pressure. We commonly reference trying to supply water to a fire hose with a garden hose, it is the same principle, in regards to compressed air.
When looking to maintain an efficient compressed air system, it’s important that you use properly sized supply lines and fittings to support the air demand (SCFM) of the point-of-use device. The smaller the ID and the longer the length of run, it becomes more difficult for the air to travel through the system. Undersized supply lines or piping can sometimes be the biggest culprit in a compressed air system as they can lead to severe pressure drops or the loss of pressure from the compressor to the end use product.
Take for example our 18″ Super Air Knife. A 18″ Super Air Knife will consume 52.2 SCFM at 80 PSIG. We recommend using 1/2″ Schedule 40 pipe up to 10′ or 3/4″ pipe up to 50′. The reason you need to increase the pipe size after 10′ of run is that 1/2″ pipe can flow close to 100 SCFM up to 10′ but for a 50′ length it can only flow 42 SCFM. On the other hand, 3/4″ pipe is able to flow 100 SCFM up to 50′ so this will allow you to carry the volume needed to the inlet of the knife, without losing pressure through the line.
We also explain how performance can be negatively affected by improper plumbing in the following short video:
Another problem area is using restrictive fittings, like quick disconnects. While this may be useful with common everyday pneumatic tools, like an impact wrench or nail gun, they can severely limit the volumetric flow to a device requiring more air , like a longer length air knife.
For example, looking at the above 1/4″ quick disconnect, the ID of the fitting is much smaller than the NPT connection size. In this case, it is measuring close to .192″. If you were using a device like our Super Air Knife that features 1/4″ FNPT inlets, even though you are providing the correct thread size, the small inside diameter of the quick disconnect causes too much of a restriction for the volume (SCFM) required to properly support the knife, resulting in a pressure drop through the line, reducing the overall performance.
If you have any questions about compressed air applications or supply lines, please contact one of our application engineers for assistance.