I recently worked on a unique application for EXAIR’sBack Blow Nozzle. Generally, these products are used to clean out chips, debris, and coolant from the ID of pipes or tubes. With (3) different sizes available to clean out IDs ranging from ¼”-16” it’s the ideal solution for cleaning out pipes where blowing forward into the pipe won’t work. They’re also available on the end of a Safety Air Gun with extensions up to 72” long, allowing you to get to hard to reach areas.
This particular application, however, was slightly different. The customer has a large machine that rotates a large drum to dry the tobacco, much like a standard clothes dryer. Inside of this drum is a “spray boom” with an angled top designed to prevent the tobacco from settling and sticking in large quantities. At the end of this “spray boom” are Atomizing Nozzles used to apply a cleaning solution after each drying process is completed at the end of the shift. Unfortunately, the angled design didn’t work quite as well as they’d intended.
The customer needed a solution that could periodically clean off the boom while the drying was in operation. It wasn’t reasonable to do this at the end of the drying process once the majority of material had passed through. The accumulated tobacco on the boom was perfectly usable product and anything stuck after the cleaning operation would have to be thrown out as waste. In order to clean the boom and allow the stuck tobacco to remain as usable product, we needed an automated solution.
The customer installed (4) of the 1006SS Back Blow Nozzles situated around the boom to remove any stuck-on product during the drying process. The results spoke for themselves, at 90 PSIG it removed a 14” wide radius of material from the surface. By implementing the Back Blow Nozzle they were able to reduce waste and eliminate a daily 1-hour long cleaning process to remove stuck on material from the boom.
Just because it’s an outside-the-box application for one of our products, doesn’t mean it won’t work!! With EXAIR’s Unconditional 30-Day Guarantee, you can test any of our stock products out before committing to keep them. Reach out to an Application Engineer today if you have a unique application you’d like to discuss!
Look at the picture below of a band saw cutting a piece of tubing. The amount of debris and coolant that is coating the pipe on the inside diameter and outer diameter is substantial. Cleaning off the outside of a pipe is fairly easy and straight forward. Cleaning the ID can be difficult. This is a single instance where one of the EXAIR Back Blow Air Nozzles can turn a cumbersome job into a quick and easy step in the process.
The tubing in the photo appears to be around a 3 or 4″ ID tubing which makes it ideal to be cleaned out internally by the model 1006SS – 1/4″ Back Blow Air Nozzle. This nozzle is ideal for passage ways ranging from a 7/8″ diameter up to a 4″ diameter.
While cleaning out the short section may be able to be obtained with a forward blowing Safety Air Gun, if this was being cut from a 20′ length of tube it would be difficult to remove the debris from the remnant section of tubing. The advantage being the debris from the saw cut no longer has to be blown out or left in the longer lengths of the tube. The Back Blow Air Nozzle can easily be inserted and remove debris back from the saw cutting end. Lee Evans demonstrates this in a video below.
If you would like to discuss any compressed air application, please feel free to contact an Application Engineer. We will gladly help you determine which EXAIR product may be right for your application.
EXAIR manufactures three different sizes of Back Blow Air Nozzles to clean inside tubing, pipes, hoses, and channels. The 360o rear airflow pattern can “wipe” the entire internal surface clean from coolant, chips, and debris. They are constructed of 316SS, making these nozzles robust and durable.
Our smallest Back Blow Nozzle is the Model 1004SS. It has a M4 X 0.5 male thread and can clean diameters ranging from ¼” (6.3mm) to 1” (25.4mm). Model 1006SS has a ¼” NPT air connection for cleaning inner diameters ranging from 7/8” (22mm) up to 4” (102mm). Our largest Back Blow Air Nozzle is the model 1008SS. It has a 1” NPT connection, and it can be used inside diameters ranging from 2” (51mm) to 16” (406mm).
Now, what can make these unique types of air nozzles even more useful? Attaching them to an EXAIR Safety Air Gun. In this blog, I will go through each of our Back Blow Safety Air Guns that EXAIR can offer from stock.
The unique feature that sets the VariBlast apart from other small air guns is the force variability. The valve is designed to control the opening to allow for a variable force with the same nozzle. The VariBlast is made from a durable cast aluminum construction for tough industrial use. It has a rugged ergonomic grip with a user-friendly trigger. The compressed air inlets are located in two different positions to select the best fit for your application.
With the model 1004SS Back Blow nozzle, the VariBlast Compact Back Blow Safety Air Gun is a small but powerful tool that can clean inside smaller pipes, tubes, and hoses. They come standard with extension tubes and a Chip Shield. The extension tubes range from 6” (152mm) to 36” (914mm) to extend deep inside cavities and openings. The Chip Shield is made from a durable polycarbonate material that will protect your operators during use.
The next air gun in this series is the Soft Grip Safety Air Gun. With an ergonomic soft handle and full-grip trigger, the Soft Grip Safety Air Gun can be used for hours without fatigue. EXAIR offers two types of Back Blow Nozzles with the Soft Grip; model 1004SS and model 1006SS.
As a “bigger cousin” to the VariBlast above, the Soft Grip Back Blow Safety Air Gun with the model 1004SS has extensions ranging from 6” (152mm) to 36” (914mm) as well as a Chip Shield. The Soft Grip with the model 1006SS Back Blow Nozzle has extensions that range from 6” (152mm) to 72” (1,829mm) in length with a Chip Shield. Both of these types of Soft Grip Back Blow Safety Air Guns are great products in allowing you to clean inside a greater variety of diameters and lengths.
For rough industrial environments, EXAIR offers the Heavy Duty Safety Air Guns. They come with a composite rubber grip and a wide curved trigger. It has a 3/8” NPT inlet for increased compressed air flow for those “tough” cleanings.
The Heavy Duty Back Blow Safety Air Gun comes standard with the model 1006SS Back Blow Nozzle, an extension pipe, and a Chip Shield. The extensions lengths can range from 6” (152mm) to 72” (1,829mm). If you need a tough air gun for rugged areas to clean inside pipes and tubes, the Heavy Duty Back Blow Safety Air Gun could be the best candidate for your application.
As our largest model, the Super Blast Back Blow Safety Air Gun has the strongest blowing force. They can clean large areas inside pipes, channels, and tubes ranging from 2” (51mm) to 16” (406mm) in diameter. It has a soft foam grip for easy handling and a spring-loaded manual valve that will turn off if dropped. The model 1008SS Back Blow Nozzle is mounted to an extension that is either 1 foot (0.3m), 3 feet (0.9m), or 6 feet (1.8m) in length. With a 1” NPT inlet, the Super Blast Back Blow Safety Air Gun will generate a strong blast of air for cleaning and removing troublesome material.
If you need to clean inside tubes, hoses, channels, pipes, etc., EXAIR has the perfect product, the Back Blow Air Nozzles. They can remove the dirty coolant, chips, and debris in a non-contact way. EXAIR offers these nozzles with our VariBlast, Soft Grip, Heavy Duty, and Super Blast Safety Air Guns for manual cleaning operations. EXAIR stocks these Safety Air Guns for fast delivery. And if you are located in the U.S.A or Canada, we offer a 30-day unconditional guarantee. You can try them out and see how effective, safe, and powerful they are in improving your internal cleaning processes. If you need more details, you can contact an Application Engineer at EXAIR. We will be happy to help you.
A manufacturing plant EXAIR worked with made cast aluminum tubes for the automotive industry. After the parts were cast, a machining operation would clean the ends. This left coolant and metal shavings inside the tube. Before going to assembly, they had to clean the part. They created a two-tube fixture (reference picture above) to fit the 25mm tubes in place.
Two home-made nozzles were used to fit inside the tubes to blow compressed air. The nozzles were attached to the ends of two 17mm pipes which supplied the compressed air. A cylinder was used to push the nozzles from the top of the aluminum tube to the bottom then back up again. The liquid emulsion and debris would be pushed downward into a collection drum. When they started operating their system, the inside of the tubes still had contamination inside. They wanted to improve their process, so they looked for an expert in nozzle designs, EXAIR.
EXAIR designed and manufactures a nozzle 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, and channels. The 360o rear airflow pattern can “wipe” the entire internal surface from coolant, chips, and debris. For the application above, I recommended the model 1006SS Back Blow Air Nozzle. This 316SS robust design would fit inside the tubes above. The range for this Back Blow Air Nozzle is from 7/8” (22mm) to 4” (102mm) diameters. The customer did have to modify the function of the equipment by placing the cylinder and the rods under the aluminum tubes. The reverse airflow would still push the contamination into the collection drum that was placed underneath the tubes.
After installing the model 1006SS onto the rods, the cleaning operation became more efficient. Not only was the entire internal diameter getting clean, they were able to turn off the compressed air until they reached the top of the tube. With the model 1006SS, they only needed one pass to clean. This cut the air consumption in half, saving them much money by using less compressed air. 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.
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.
A little while back, I was contacted by a customer who was looking for a way to clean chips and debris out of tapped holes in an engine block. They were familiar with our products, having used them in several different areas in their plant, and had done some early research into our Air Nozzles.
They were considering using our small M4 Back Blow Air Nozzle in the process. The Back Blow Air Nozzles produce a 360° airflow that blows away from the end of the nozzle and in many cases, are the ideal solution for treating the inside diameter of hose, pipe, machined holes, etc. These unique nozzles, eliminate the concern of forcing particulate further down into a machined hole or the safety issue of blowing material out of the opposite end of an open tube or pipe.
In this particular case, having the material blown out of the hole increased the risk of possible cross contamination somewhere else in the engine block so they were also thinking of incorporating some type of recovery system like our Chip Vac or one of our Line Vacs but were concerned with having to use two separate devices.
Once again, EXAIR has the perfect solution, the Deep Hole Vac-u-Gun. The Deep Hole Vac-u-Gun features a small blow tube (1/8″ OD) that provides a small blast of air to dislodge or loosen foreign material while simultaneously providing vacuum to carry the debris away.
If you have a similar application or would like to discuss how an EXAIR Intelligent Compressed Air Product can help solve a unique situation, contact an application engineer for assistance.
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.
A few weeks ago I received an inquiry from a customer who was looking to blow water off the inside of a closed cylinder after a zinc bonding process. There are 8 parts that are placed on a manifold which is then inverted and sent into their current blow off setup that includes small open tubes that get inserted into each cylinder to try and blow out the water. This setup worked a little but the issue they were experiencing was the airflow coming out of the tubes was blowing the water up, which caused it to collect in the “bowl” of the cylinder and as the blow off tubes were removed, the water would start to leak back out and down the inside walls again. After the current blow off, the parts are manually removed and inspected for moisture content. If the parts are found to be outside of their tolerances, an operator uses a modified blow gun fitted with a small tube to manually complete the process.
After discussing the particulars with the customer, their needs were two-fold – first they needed a nozzle that wouldn’t push the air toward the end of the tube but something that would direct the air “backwards” so as they placed the nozzle inside, they could hopefully “pull” the liquid out as the nozzle is removed. The second concern was the cylinder had a small 0.390″ diameter opening so the nozzle would need to be small and powerful enough to be able to fit inside the part, while still providing effective blowoff.
Once again, EXAIR offered the perfect solution, our Model # 1004SS M4 Back Blow Nozzle. The Back Blow Air Nozzle produces an even, 360° airflow that is directed away from the end of the nozzle. At only 0.20″ in diameter, The Model # 1004SS is the ideal choice for treating the inside diameter of small hose, pipe, bores (up to 1″) or in this case, small enough to fit inside the opening of the cylinder. With this design blowing the air back away from the end, the water wouldn’t get trapped in the bowl but rather would allow the inside walls of the cylinder to be wiped clean while directing the liquid toward the opening so the water can be removed.
In addition to the Model # 1004SS M4, we also offer our Model # 1006SS 1/4″ NPT Back Blow Nozzle for use with 7/8″ to 4″ ID’s, as well as our Model # 1008SS 1″ NPT unit for treating large ID”s up to 16″, for larger scale applications