EXAIR’s highly engineered and efficient Back Blow Nozzle’s provide a powerful 360° airflow through an array of holes to remove coolant, chips or debris. Back Blow Nozzle’s are the perfect solution for cleaning out the inside of any pipe, tube, hose or channels.
Air Wipes, which provide 360 degree blowoff, are typically used to remove heat, liquid, debris or static from wire, cable, pipe, tube, or extrusions.
We had a customer that was using a block type Air Wipe from a competitor to remove water from an extrusion. These air wipes are built using a plastic material, typically with some additional ceramic insert to resist abrasion of the wire, the halves are hinged with air holes drilled into each half which carries air through the block and on to the wire. They were using these block air wipes on several lines. The interesting point of this blog is that it required 5 block type air wipes to equal the results of 1 EXAIRSuper Air Wipe.
Since EXAIR’sSuper Air Wipe equaled the performance of 5 of the competitors it consumed less air was less expensive and produced less noise. Also in space sensitive applications the EXAIR Super Air Wipe is much thinner than the block type. To highlight this the Super Air Wipe is 1.13″ thick on all 11 models that range from 3/8″ to 11″ throat diameter. The performance of the block air wipe can only be changed by altering the inlet air pressure while the EXAIRSuper Air Wipe can also be changed by adusting the inlet air pressure OR by adding an additional shim the force can be nearly doubled!
Many of these block type air wipes use a series of holes to direct the compressed air supply at an angle over the material that needs to be cleaned off. EXAIR’sSuper Air Wipe being an engineered compressed air product use’s fluid dynamic’s to create more force as demonstrated below. The air from EXAIR’s Super Air Wipes is a continuous 360 degrees, without the gaps a series of holes creates.
Compressed air flows through the inlet (1) of the Air Wipe into the annular chamber (2). It is then throttled through a small ring nozzle (3) at high velocity. This primary airstream adheres to the Coanda profile (4), which directs down the angled surface of the Air Wipe. A low pressure is created at the center (5) inducing a high volume flow of surrounding air into the primary airstream. As the airflow leaves the wipe, it creates a conical 360° ring of air that attaches itself to the surface of the material running through it (6) uniformly wiping the entire surface with the high velocity airflow.
Block type air wipes are generally available in standard sizes up to 7″ in diameter while EXAIR’sSuper Air Wipes are available in stock diameters up to 11″ and we also offer custom sizes to suit many other applications.
If you have any items that need to have a 360 degree blowing pattern, I would enjoy hearing from you…give me a call.
In certain applications such as blowing chips or debris out of a pipe or blind hole, it may not be possible to blow forward. The pipe may be too long, making it impossible to push the debris all the way down the pipe or the other end of the pipe may not be open. In either of these scenarios, the Back Blow Nozzle is the right tool for the job. An array of holes around the diameter of the Back Blow Nozzles provides a powerful 360° airflow pattern that will clear out any leftover coolant or chips from the machining process.
EXAIR has three different size Back Blow Nozzles; the 1004SS (M4 x .5), the 1006SS (1/4 NPT), and the 1008SS (1” NPT). The 1004SS is recommended for use on pipes as small as ¼” and up to 1”. The 1006SS can be used for a wide range of pipe sizes, from 7/8” up to 4”. The 1008SS nozzle offers the greatest overall force for stubborn or sticky materials stuck to the inside diameter of the pipe. This nozzle is suitable for use in pipes ranging from 2”-16”. As the Back Blow Nozzle will be blowing chips and debris back out of the pipe towards the operator, it is always recommended that a Chip Shield is used. The strong polycarbonate Chip Shield will keep them safe from flying debris and keep you in compliance with OSHA directive 1910.242(b). For visual representation of the performance of the Back Blow Nozzle, take a look at this short video clip that demonstrates its use.
All of EXAIR’s Back Blow Nozzles are available with extensions. For the 1004SS we have extensions from 6”-36”, and from 12”-72” for the 1006SS and 1008SS. The Back Blow Nozzle can also be installed on our VariBlast, Soft Grip, Heavy Duty, and Super Blast Safety Air Guns. With such a wide range of available sizes and configurations, we can tackle just about any internal pipe cleaning application. If you have a process in your facility that may benefit from the use of one of these nozzles, give us a call and get one on order today!
Have you ever wondered how Back Blow Nozzles operate inside of a pipe? Check out the video above for a peek at what’s happening when using the Back Blow Nozzles. And, as always, contact an EXAIR Application Engineer with any questions.
In the last year EXAIR has released two products that aid in cleaning and cooling cylindrical shapes. The liquid sprayed from our AT1010SS Internal Mix Spray Nozzle creates a 360° Hollow Circular Pattern that is excellent for cleaning the inner diameter of a pipe, a casting, or a bore. The 1006SS Back Blow Nozzle is an air only nozzle that is designed to clean, dry or cool the inside diameter of a hose or tube and also effective cleaning out channel. These products can be used in conjunction to create a more powerful system than either component by itself.
The AT1010SS spray nozzle can be used in a variety of applications. As I mentioned above the 360° spray pattern is great for spraying out the inside of a pipe or duct-work. In addition to these applications, the nozzle can be used to cover a wide area with spray patterns up to 53 inches in diameter. This wide spray area can be used for humidification, dust suppression, cooling or sanitizing. The 303 stainless steel construction of the nozzle will hold up to a variety of chemicals and environments. These nozzles can cover a significant area while using a relatively small amount of air and liquid. The AT2010SS is also available which features EXAIR’s No Drip design (patent pending), which will positively shut off the liquid flow when air pressure is removed. This eliminates unwanted drips which can ruin surfaces and waste expensive liquids. The 360° Circular Hollow spray pattern is a versatile nozzle that covers a variety of applications.
The 1006SS back blow nozzle features a number of orifices around the outside of the nozzle which force air back toward the operator and away from the air inlet. In most applications this will be used to pull water, chips, coolant, or debris out of the end of a pipe, channel, or tubing to clean the inner diameter. The Back Nozzles will typically be offered with a chip shield to contain any chips or debris from blowing towards the operator.
These two nozzles used in conjunction would work great to cool, clean, and dry the inside of, say, a welded pipe. The AT1010SS could be used to flush the inside of the pipe with water to cool the weld and blow out and weld slag or grinding dust from preparing the area. The 1006SS could pull out the water or debris from the inside of the pipe. The AT1010SS can be reinserted to spray the inside of the pipe with a rust inhibitor to maintain the quality of the weld until installation. These nozzles work well together to clean the ID of the channel, tube or hose in your application.
Recently, I had the pleasure of solving an application for a steel pipe manufacturer. To clean the inside diameters of their freshly-washed pipes, they were using open end blow offs: the ever-popular and easy-to-make, but loud and inefficient crushed-end tubing. I got excited, because this was my first chance to discuss our brand-new Back Blow Nozzle, which is aimed (pun intended) at cleaning inside diameter surfaces. That’s where my story develops a “bad news/good news/better news” pattern…
The good news: The user already had a system set up, using the aforementioned “homemade” blow offs, which looked something like this:
The better news: They were able to easily adapt their system to install our Model 1120 High Force Super Air Nozzles, which lowered their compressed air consumption as well as the noise level of the operation.
The moral to this story is, the solution may not be the first one that comes to mind. At EXAIR, that happens all the time. Line Vac questions turn into Air Amplifier answers, and vice versa. Cold Gun calls turn to discussions of Adjustable Spot Coolers. We’ve got three styles of Air Knives to choose from…they’re all perfectly suitable for a wide range of general industrial applications, but they each have their own particular advantages in certain situations. If you have a compressed air product application that you’d like to discuss, EXAIR is your best bet for the most efficient, quietest, quickest solution. It’s like I always say:
The second atomizing air nozzle that EXAIR introduced in Catalog 27 is the Internal Mix 360 Degree Hollow Circular Pattern Spray Nozzle, part number AT1010SS. This nozzle produces circular air pattern perpendicular to the flow of most atomizing air nozzles. The AT1010SS can create a mist across 53 inch diameter circle. The nozzle is constructed of 303 Stainless Steel for use in corrosive environments. It operates on a continuous stream of compressed air and pressurized liquid. The AT1010SS features a compact design that is 3.20 inches long, 1.69 inches wide, and 0.88 inches thick to fit into small ducts or hard to reach corners.
This spray pattern is perfect for coating the inside of a pipe with rust preventative, paint, or protective coating. The flow pattern would also be able to coat a variety of duct shapes. Mounted over a process, the nozzle pattern is also great for dust suppression, humidification and cooling over a wide area.