The EXAIR Soft Grip Super Air Scraper is a great tool for any industrial environment that requires some cleanup. Some examples include removing tapes or sticky metal chips from the floor, scraping material from screening towers or removing stubborn adhesives and labels from workstation tabletops. They are available with extensions up to 72″ so reaching remote areas is also easier.
Today’s video is going to showcase how easy it is to replace the scraper blade within the nozzle and get back to work quickly.
If you would like to discuss how the Super Air Scraper could benefit your facility, contact us.
Compressed air, as a utility, dates back to ancient Egypt, where metal alloy production was enhanced by using bellows devices to force air into furnaces in order to generate the extremely high temperatures needed to meld iron ores. Major industrial use began in the mid-19th century, as pneumatic drills became popular for tunneling and mining operations. With the development and large scale production of the modern air compressor in the 20th century, many other uses for compressed air were discovered.
Among the most prevalent of these additional applications is cleaning & blow off. Mechanical or chemical methods such as washing, scrubbing, brushing, wiping, etc. often take time and considerable effort, when a quick blast of high velocity air from a pressurized source can make quick work of debris and/or moisture removal. Thing is, unfettered discharge of high pressure air without concern for safety or efficiency has consequences:
Open end blow offs without a relief path for the air in case the device is dead ended, can have enough energy to break the skin, causing a dangerous and potentially fatal condition known as an air embolism. The Occupational Safety and Health Administration (OSHA) specifically addresses this danger in 29 CFR 1910.242(b).
They’re also incredibly loud, usually higher than 100 decibels, which exceeds OSHA’s noise exposure limits per 29 CFR 1910.95(a).
As if that wasn’t enough, they can waste an awful lot of compressed air too. The U.S. Department of Energy even goes so far as to classify it as an Inappropriate Use of Compressed Air.
Given these drawbacks, you might wonder why ANYONE would do such a thing! Well, that’s the nature of our business at EXAIR Corporation: manufacturing quiet, safe, and efficient compressed air products for industry. Among these are the first engineered products developed by EXAIR: Air Nozzles and Jets. No matter what your blow off needs are, we’ve got a solution. Consider:
Durability. Some environments where blow off is required are downright aggressive: high heat, exposure to corrosive chemicals, etc. With these situations in mind, we offer Air Nozzles & Jets in a variety of materials of construction, as shown to the right:
Zinc Aluminum alloy
Types 303 and 316 Stainless Steel
PEEK (polyether ether ketone) thermoplastic
Range of operation. Any blow off device’s performance can be varied by regulating the compressed air supply pressure. EXAIR offers several products with even greater ability for change:
The Model 1009 (Aluminum) and 1009SS (303SS) Adjustable Air Nozzles have a micrometer-like dial that allows you to very precisely set the flow & force to exact requirements.
Adjustable Air Jet Models 6019 (brass) and 6019SS (303SS) feature similar operation with a micrometer-like gap adjuster/indicator.
Our 1″ and 2″ Flat Super Air Nozzles (available in Zinc Aluminum or 316SS) have a replaceable shim. The standard models have a 0.015″ thick shim installed, and the High Power models have 0.025″ thick shims. We also offer individual shims, and sets, ranging from 0.005″ to 0.030″ thicknesses.
High Velocity Air Jets come in brass or 303SS, and also have replaceable shims. The one that comes installed is 0.015″ thick. The Shim Set gives you a 0.006″ and 0.009″ shim.
Function. Most of our Air Nozzles generate a high velocity air stream coming straight from its end. We’ve also engineered some nozzles for specific applications:
Model 1144 2″ Super Air Scraper is our popular 2″ Flat Super Air Nozzle with a corrosion resistant scraper blade, making quick work of removing stubborn materials like tape, gaskets, labels, grease, paint, or sealant. It’s particularly handy when installed on a Soft Grip Safety Air Gun with an appropriate length of pipe extension.
Back Blow Air Nozzles are made to clean out inside diameters or blind holes. Three sizes are available for ID’s of 1/4″ to 16″.
If you’d like to find out more about how EXAIR Intelligent Compressed Air Products can help you get the most out of your compressed air system, give me a call.
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With 142 distinct models in stock, the Atomizing Spray Nozzles are easily EXAIR Corporation’s most diverse product line. If you need a reliable method of creating a fine mist of liquid flow with a flow rate as high as 303 gallons per hour (or as low as 0.1 gallons per hour,) with a spray pattern as large as 13 feet (or as small as 2-1/2 inches) in diameter, look no further – we have a spray nozzle for you, on the shelf and ready to go.
Siphon Fed models are the subject of today’s blog – they don’t require that the liquid be under pressure; you can feed them from the vessel the liquid comes in from a siphon height of up to 36 inches, or, for higher flows, from a gravity height of as low as 6 inches.
All Atomizing Spray Nozzles are available with EXAIR’s patented No-Drip option, which positively shuts off liquid flow when the compressed air supply is shut off. One benefit of this is realized in coating applications, where an errant droplet of liquid would mar an otherwise smooth, even coating. Operationally, though, it also means you can precisely turn the liquid flow on & off, in short, quick bursts, up to 180 times a second.
By far, the simplest way to do this is with a valve installed in the air supply line to the Atomizing Spray Nozzle. A manual 1/4 turn ball valve works fine if you want the operator to control it. Solenoid valves are often used to automate the process, and if you’ve got something to open & close the valve, you’re all set. For example, if you want to spray coolant onto a cutting tool, just wire the solenoid valve into the on-off switch of the machine, like in the example shown to the right.
Alternately, our EFC Electronic Flow Control System provides a ready-to-go solution. It comes pre-wired; all you have to do is plumb the valve into the air supply line and plug it in to a 120VAC grounded wall outlet. When the photoelectric sensor “sees” the part you want to spray, it opens the valve. When the part passes, it shuts the valve. Easy as that.
The Second Step to optimize your compressed air system is to Find and fix leaks in your compressed air system. The reason leaks are important to find and fix is because they can account for 20-30% of a compressors total output. A compressed air leak fixing process can save 10-20% of that lost volume.
Unintentional leaks will result in increased maintenance issues and can be found in any part of a compressed air system. Leaks can be found at a poorly sealed fitting, quick disconnects and even right through old or poorly maintained supply piping. Good practice will be to develop an ongoing leak detection program.
The critical steps needed for an effective leak detection program are as follows:
Get a foundation (baseline) for your compressed air use so you have something to compare once you begin eliminating leaks. This will allow you to quantify the savings.
Estimate how much air you are currently losing to air leaks. This can be done by using one of two methods.
Load/Unload systems, where T= Time fully loaded and t=Time fully unloaded:
Leakage percent = T x 100
(T + t)
Systems with other controls where V=cubic feet, P1 and P2=PSIG, and T=minutes
Leakage = V x (P1-P2) x 1.25
T x 14.7
Know your cost of compressed air so you can provide effectiveness of the leak fixing process.
Find, Document and Fix the leaks. Start by fixing the worst offenders, fix the largest leaks. Document both the leaks found and the leaks fixed which can help illustrate problem areas or repeat offenders, which could indicate other problems within the system.
Compare the baseline to your final results.
Repeat. We know you didn’t want to hear this but it will be necessary to continue an efficient compressed air system in your plant.