If you are like me and love to garden we are approaching the time of year that we start seeding our longer maturing plants like tomato and pepper plants. I have made my purchases of seeds, plant packs, soil and plant food. I am ready and excited for the gardening season.
EXAIR has many applications where our products help the agricultural industry. The use of our Air Knives, atomizing spray nozzles and Line Vacs help assit in the growing, cleaning and movement of products.
EXAIR Atomizing Spray Nozzles atomize fluids (most commonly water) in a range of spray patterns for a variety of uses. These nozzles can be used to keep soils moist, environments humid and also for cleaning the harvested products. The Atomizing Spray Nozzles come in a variety of sizes, styles and spray patterns and can be sized specifically for your application.
EXAIR Air Knives can also be used for cleaning where moisture is a concern before products are placed in packaging containers. Our Air Knifes come is many stock sizes and styles. EXAIR Air Knives are a great option replacing noisy blow-offs and show noise and air consumption reductions.
EXAIR Line Vacs have been used to move grains, soil, sand, wood chips and other products saving labor. They are ideal for moving large volumes of material over long distances. The material flow rate is easily controlled by the size of the Line Vac and by the use of a pressure regulator. No moving parts or electricity assures maintenance free operation.
Just as I am excited to strategize my garden, EXAIR can take the frustration of your projects away and make your life as as exciting and fun as Spring and Summer home gardens. If you have a specific application you would like to discuss you can visit us at www.EXAIR.com or by calling 800.903.9247 and talking to me or any of our qualified Application Engineers.
Compressed air is a necessary utility in any manufacturing environment. When used improperly, this compressed air can pose very real and serious dangers to your personnel. It’s imperative that you’re aware of the potential risks associated with the use of compressed air and educate yourselves and your operators to ensure you’re operating safely.
OSHA (Occupational Safety and Health Administration) provides standards designed to mitigate the risks of compressed air usage. If not adhered to, fines can be administered for each infraction. Fines are given out for each individual infraction. Meaning, if you have unsafe blowguns that are used in your facility you’ll get a notice for each individual gun that is identified during an inspection. Inspections aren’t something that happen often, but they will show up unannounced and often at the worst possible times.
OSHA Standard 1910.242(b) discusses the use of compressed air for cleaning and blowoff. It states that the use of compressed air for cleaning purposes is prohibited if the dead-ended pressure exceeds 30 psig. This phrase means the downstream pressure of the air nozzle or gun, used for cleaning purposes, will remain at a pressure level below 30 psig for all static conditions. In the event that dead ending occurs, the static pressure at the main orifice shall not exceed 30 psi. If it does exceed this pressure, there is a very high potential for it to create an air embolism. An air embolism, left untreated, can quickly impede the flow of blood throughout the body. This can lead to stroke, heart attack, and sometimes death.
With this in mind, there are only two options for staying within compliance of this standard. Either install an engineered solution that will reduce the air pressure to less than 30 psig if dead-ended, or regulate the pressure below 30 psig. For the vast majority of operations, regulating the input pressure below 30 psig is useless. The force and flow from the nozzle at this pressure is greatly reduced and likely not enough to be effective in most applications. All of EXAIR’s Safety Air Guns are designed so that the flow cannot be dead-ended. The fins on the Super Air Nozzles are not only useful in amplifying the force by drawing in ambient air, but they also prevent an operator from completely obstructing the airflow.
In addition to being concerned about dead-end pressure, OSHA 1910.242(b) also states that compressed air used for cleaning should include effective chip guarding. By this, they mean that some method or equipment must be installed that will prevent chips and particles from coming back into the eyes or skin of the operator. In addition to offering OSHA compliant nozzles and guns, EXAIR also has Chip Shields that can be installed onto any of our Safety Air Guns. The polycarbonate shields protect the operator from any flying debris while performing a drying or blowoff operation. Simply add a “-CS” to the end of any Safety Air Gun Model number to have a Chip Shield installed on the gun.
Hearing loss due to high noise levels is another common problem in many industrial facilities. Without the use of proper PPE, hearing loss can occur quickly. This is a serious concern as hearing loss is permanent and once the damage is done there’s no way to reverse it. Due to this risk, OSHA strictly enforces standard 29 CFR-1910.95(a).
This directive discusses the effects of noise and limits exposure based on the dBA. The table below indicates the maximum allowable exposure time to different noise levels. Sound levels that exceed these levels should first be addressed by proper engineering controls such as isolating the source of the sound from personnel or replacing the cause of the sound with something like an engineered compressed air nozzle. When such controls aren’t feasible, proper PPE must be worn to protect the operator.
The Occupational Safety and Health Act of 1970 does not contain any provisions that allow for the approval or endorsement of equipment. Alteration or the misapplication of what was once a safe piece of equipment would create a dangerous scenario that is out of the control of the original manufacturer. Any nozzles or guns marketed as “OSHA approved” should immediately throw up a red flag. Identifying and implementing a safe, OSHA compliant solution rests in the hands of the manufacturer themselves. If you’ve got questions about compressed air safety or have an existing blowoff in place that does not adhere to this OSHA directive, give us a call. We’ll be sure to recommend a solution that will keep your operators and wallets safe!
Tyler Daniel Application Engineer E-mail: TylerDaniel@EXAIR.com Twitter: @EXAIR_TD
EXAIR does not shy away from an application or solution that doesn’t involve a stocked or catalog product. We often provide customized solutions for a wide variety of customers across nearly each and every industry. Sometimes the cataloged products we stock on the shelf doesn’t quite fit the application as best as it could. If we can modify them or make something custom from scratch, we absolutely will!
Recently I worked with a customer who was looking to solve a new application related to the current COVID-19 pandemic. He owned a cleaning company that contracts with a variety of local businesses to provide cleaning and sanitation services. Typically, that would consist of a bi-weekly visit to tidy up the office spaces and provide a general cleaning. With the current risks of COVID-19 running rampant, he’s seen a dramatic increase in businesses looking to implement a daily sanitization of common surfaces throughout the office.
While this is a service that he’s offered for some time, the current crisis has led many more companies to request additional cleaning within their offices. To perform this disinfecting procedure, the droplet size of the mist is critical. The spray gun that he was previously using did not provide a fine enough mist to reliably decontaminate the area. In addition, this gun was consuming too much liquid that would puddle up on various surfaces that would have to be later wiped down and dried. He was looking for a handheld solution that provided a fine enough atomization to both effectively eliminate any pathogens as well as prevent the unnecessary step of having to come behind and dry everything off.
Our line of Atomizing Spray Nozzles is an ideal solution for applications where a fine mist of fluid is required. But, these aren’t designed to be used in a handheld operation. Fortunately, we do have a variety of Safety Air Guns, extensions, and fittings that allow us to install an Atomizing Nozzle on the end of a handheld gun. In the photo below, we used a Model SF2020SS No-Drip Siphon Fed Atomizing Nozzle to produce the atomized flow of disinfectant. With standard fittings that we have in stock, we’re able to connect the nozzle to the end of a gun with a 24” extension. The operator carries a jug of disinfectant that is then drawn into the nozzle without the need for a pressurized tank or pump.
This is just one example of a custom product designed specifically for a particular application. A quick search here on the EXAIR Blog will show a variety of various special products we’ve created over the years. Even though we regularly roll out new products and have been in business for nearly 37 years, there are still cases that we encounter for something we haven’t done before. If you have an application that you believe may be better served by something a bit customized, give us a call. An Application Engineer would be happy to discuss your application and help to determine the best solution.
Atomization is a word that can be seen throughout the industry in rinsing, coating, painting, lubricating, and cooling applications. The act of atomization is simple, we often refer to it when looking at liquids and it means to break up the liquid stream and form fine droplets. This is essentially a transfer of energy. There are two mainstream methods to atomize liquids for an application, both with their own advantages.
The first is air atomizing. This action is done by combining a stream of compressed air with either a pressurized fluid or a siphon/gravity fed liquid. The air stream can be combined with the liquid internally to the nozzle, hence Internal Mix Atomizing Nozzles. It can also combine outside of the nozzle, like the External Mix Atomizing Nozzles. We have blogged before on where to use each of these as the reason to select between Internal Mix or External Mix is its own topic.
Benefits to air atomization are, smaller droplet/particulate size is achievable. The compressed air atomization gives the ability to break up more viscous fluids to get better coverage or thinner layers of spray. Air atomization also gives the ability to use smaller amounts of liquid because the air takes up a portion of the total flow exiting any nozzle.
The second type of atomizing nozzles are hydraulic atomization. This uses the energy from the liquid being pressurized to break up the liquid stream. Sometimes there are physical impacts within the nozzle that cause the atomization, other times it is just the liquid leaving an orifice that causes the atomization. This gives the ability to still spray a liquid into droplets of various shapes, dimensions, and flow rates. The lack of compressed air often results in larger droplet sizes as well as higher liquid flow rates. Because the liquid has to be pressurized to certain levels it also becomes difficult to spray higher viscosity fluids through hydraulically atomized nozzles.
Benefits to hydraulically atomized spray nozzles range from stronger spray force for rinsing, ease of installation from not needing to plumb compressed air, ability to flow slurries, or other liquids that may clog or dry due to the design of air atomized spray nozzles.
If you would like to discuss the correct nozzle for your spray application, feel free to contact us.