I recently had the pleasure of talking with a CAGI Certified Compressed Air Systems Specialist, who was working with a client to improve energy efficiency in the use of their compressed air. One particular application that was particularly taxing on their system is the use of hose barb fittings (basically, an open blow device) to fold over a cardboard box flap on a packaging line.
We discussed the possibility of trying something out, but the client wanted to look at some data, showing what their expected savings could be. Hose barb fittings are quite common, and they DO focus the flow of a compressed air discharge into a forceful little blast, which is quite effective at folding a box flap.
The client’s main concern was the force applied. In truth, there’s no better way to maximize force than by discharging a compressed gas directly through an open ended device. Excessive force, however, isn’t the only way to solve an application like this, as I proved in a test in our Efficiency Lab. Here’s what happened:
We use 1/4 NPT hose barbs to make our Model 900061 Compressed Air Supply Hoses, so I conveniently had one of their blow off devices on hand. My caller said the pressure gauge upstream of the fitting reads 45psig. I measured the compressed air consumption at 58.4 SCFM, and the sound level at 94 dBA.
All of them folded the box flap easily. The Model HP1125 folded it just as far as the hose did in the test I rigged, and with a 37% reduction in compressed air consumption. The others folded it very nearly as far, with 62% (Model 1122) and 70% (Model HP1126) reductions.
Not to mention the drastic reduction in noise levels.
Lastly, I documented it all in a short video:
We field calls all the time from callers wanting to know how much force our Intelligent Compressed Air Products can generate. Applications like part ejection do indeed require a certain amount of force to, say, move an object in motion from a conveyor belt…that’s just physics. Most blow off applications (and folding over a flat box flap, for instance,) just need air flow…which engineered products from EXAIR Corporation can handle just fine, and at a fraction of the compressed air use & sound levels associated with open end blowing devices.
If you’d like to find out how EXAIR Corporation can help save you money on compressed air consumption, and ear plugs, give me a call.
Russ Bowman Application Engineer EXAIR Corporation Visit us on the Web Follow me on Twitter Like us on Facebook
I recently received an inquiry from a customer to test their current air guns through our Efficiency Lab service. According to the operators, the handheld blow gun they were purchasing from a commercial retailer was too loud and complaints were rolling in. They were also hoping to save some compressed air in the process as they were performing an energy audit at the same time.
The gun they sent in looked fairly similar to our Precision Safety Air Gun but it did not have an engineered nozzle on the tip of it. Instead, it was simply a cross cut hole in a piece of material. The air inlet to the gun was a 1/4″ NPT just like our Precision Safety Air Gun, the extension on the gun was slightly longer, the only significant variance I saw was the tip.
To try and get as much information as possible I measured the O.D. and I.D. of the extension, the hole size was approximately .140″. I measured the extension on our Precision Safety Air Gun just to see what is different, it came in at the same size. So, I flow tested the competitive blow gun with their tip on it and came up with air consumption of 12.69 SCFM, noise level of 92 dBA at 3′ away, and a blowing force of 11.5 oz at 80 psig. I then measured the same attributes of EXAIR’s model 1410SS-CS Precision Safety Air Gun at 80 psig inlet pressure. The model 1410SS-CS measured 8.3 SCFM, gave 8.1 ozs of working force, and only produced a 75 dBA sound level from 3′ away.
The sound level reduction was a total of 17 dBA which is below the OSHA standard for allowable noise level exposure, as well as reduced their air consumption by 4.39 SCFM. That is almost a 35% reduction in their compressed air usage per gun replaced. After seeing these levels of reduction the customer had more than enough information to provide management with in order to replace the blow guns not just for noise level reduction but also because it will reduce air use and save money. A clear supportive role in their energy audit.
Earlier this morning I took a call from a production facility here in the U.S. with a specific application need. In this facility, bricks are made via automated processes, and during one stage of production a residue remains which affects future product progression.
To combat the residue accumulation, airguns were mounted in place with the triggers zip tied and controlled by an adjacent solenoid. Using 1/4″ NPT nozzles of unknown origin, these air guns remove the build up of small granular dirt along the edge of the bricks. An image of this setup can be seen above.
While the solution provided some relief, the compressed air use was deemed excessive and the noise level too high. The end user in this case contacted EXAIR for a more efficient and more quiet solution.
Due to the size of the existing nozzles, and the desire of the end user to only replace the nozzle portion of the setup, our recommendation was to use model 1100 or model 1126Super Air Nozzles. Based on prior experience, I recommended to test each style of nozzle to determine which will provide the better result.
The customer responded in turn. “Not a problem. We have other applications that need this same type of upgrade. I’m sure we’ll use them both and be calling you again.”
Solving problems and upgrading existing solutions is what EXAIR products are designed to do. If you have an application you’d like to discuss, contact an Application Engineer.