Friday, 27 August 2021

Super Air Amplifiers: Evacuation of Smoke or Fumes


 In the pneumatic industry, there are two types of Air Amplifiers.  One type will amplify the inlet air pressure to a higher pressure.  The other type uses the inlet air pressure to amplify the air volume.  EXAIR manufactures the volume type called the Super Air Amplifiers™. 

This change in air volume is called the amplification ratio.  So, what does this mean?  The definition of ratio is the relation between two amounts showing the number of times one value is contained within the other.  For the EXAIR Super Air Amplifiers, the ratio is the value that shows the amount of ambient air that is drawn within the compressed air.  The higher the ratio, the more efficient the blowing device is.  The EXAIR Super Air Amplifiers can reach amplification ratios up to 25 to 1.  This means that 25 parts of ambient “free” air is introduced for every 1 part of compressed air. 

Why an EXAIR Super Air Amplifier?  Like a fan, they are designed to move air.  But fans use motors and blades to push the air toward the target.  The fan blades “slap” the air which creates turbulent air flows and loud noises. The Super Air Amplifiers do not use any blades or motors to move the air.  They just use a Coanda profile and a patented shim to create a low pressure to draw in the ambient air.  In physics, it is much easier to pull than it is to push.  The process of pulling air through the Super Air Amplifiers make them a more efficient, uniform, and quiet way to blow air. 


Super Air Amplifier – flow region
To show the power of the Super Air Amplifier, we have a video of a model 120022.  In the video, oil is being heated to generate smoke, and the Super Air Amplifier is placed in the center of an exhaust pipe.  This demonstration was for a customer that was looking to evacuate vapors from an enclosed area.  Other applications would include welding smoke, ventilation, exhaust tank fumes, and dust collection.  You can see when the Super Air Amplifier is turned on and in operation in the video below. 

EXAIR manufactures and stocks five different sizes ranging from ¾” (19mm) up to 8” (203mm) in diameter.  Some of the benefits that the Super Air Amplifiers have is the inlet and outlet can be ducted for remote positioning.  They are very compact and can fit into tight places like the exhaust pipe above.  They do not have any moving parts to wear or need electricity to run.  They only need clean compressed air to operate; so, they are maintenance-free.  Another unique feature of the EXAIR Super Air Amplifier is the patented shim which optimizes the low-pressure to draw in more ambient air.   As an added bonus, they are OSHA safe and meet the standards for noise level and dead-end pressure. 

With the today’s cost to make compressed air, it is important to use it as efficiently as possible.  The EXAIR Super Air Amplifiers have the ability to give effective blowing to remove debris, dry parts, transport material, cool objects, and clear smoke without using a large amount of compressed air. |

Vivek Engineers
#22, 1st Floor, 1st Cross, Adj. to IIMB Compound, Bilekahalli Indl. Area, 
Bannerghatta Road, Bangalore - 560 076 
Ph : 080 -  2648 1309, 4170 1145.
Mob : 097404 39220






    

Thursday, 19 August 2021

6 Important Factors when Choosing a Safety Air Gun


 

If you look at operating costs alone, compressed air can be just about the most inefficient method there is for cleaning parts. If you just look at the risks, it’s potentially very dangerous too. Don’t even get me started on the insufferable noise it can make.

For cleaning parts, most folks are familiar with the use of an air gun. You can find the simplest of these in many industrial settings: a valve (often in the form of a handheld trigger device) fitted with a nozzle of some sort (often in the form of an open ended tube, pipe, or fitting to focus or direct the air flow). These have all three of the “downsides” I opened this blog with. Of course, these concerns can be mitigated to a high degree by using the right tool for the job. That’s where engineered products like EXAIR Safety Air Guns come in. Let’s look at how we can address these three “downsides”:

Efficiency: This is all about compressed air consumption. In the simplest of air guns mentioned above, consumption is only limited by the passages in the valve (or trigger) and the discharge fitting…and those limits are usually negligible. Modifying the ends (see examples below) to focus the air flow usually has minimal effect, because you’re not appreciably changing the total cross sectional area of the discharge opening:

Here are a few modified thumb trigger air guns that were sent in for Efficiency Lab testing. Left to right, compressed air consumption at 80psig supply pressure was 34.2 SCFM, 30.9 SCFM, and 28.2 SCFM. For comparison (more on this later,) EXAIR Model 1210 Soft Grip Safety Air Gun uses only 14 SCFM and generates a very similar flow pattern.

Safety: Remember learning about kinetic and potential energy in grade school? Well, when you compress air to 100psig, fitting all that air into a much smaller space creates a TREMENDOUS amount of potential energy:


The block on the left represents a cubic foot of air at atmospheric pressure. The one on the right represents how much space the first one takes up when compressed to 100psig. The energy imparted by this process HAS to be handled with care.

One problem with the thumb guns above is, if you were to jam into the palm of your hand and pull the trigger, a large component of that potential energy (pressure) turns into kinetic energy (force)…more than enough to break the skin and cause a potentially fatal condition known as an air embolism. In the United States, OSHA (Occupational Safety and Health Administration) regulates compressed air devices used for cleaning purposes. All EXAIR Safety Air Guns comply with Standard 1910.242(b) by providing a relief path to ensure that it cannot be dead ended, and thus never create over 30psi measurable at the outlet).


EXAIR Super Air Nozzles cannot be dead ended, ensuring the outlet pressure won’t reach OSHA limits, regardless of supply pressure.

Noise: Another problem is, another component is turned into sound pressure…discharging air from a direct opening is quite loud. OSHA standards address these with limitations on outlet pressure and sound level. All EXAIR Safety Air Guns comply with Standard 1910.242(b), which limits the outlet pressure (by providing a relief path to ensure that it cannot be dead ended, and thus never create over 30psi measurable at the outlet) and all but our largest Super Blast Safety Air Guns comply with Standard 1910.95(a) limits for continuous 8 hour sound level exposure.

Which brings us to the topic of this blog: How exactly did THEY (our customer who used to use the thumb guns above) select the right Safety Air Gun, and how can we apply that to getting the right Safety Air Gun for YOU?

These steps aren’t all-inclusive, and they don’t necessarily need to be followed in order, but if you call an EXAIR Application Engineer about selecting a Safety Air Gun, here’s what we’re gonna talk about:

Ergonomics: We offer five distinctive styles of Safety Air Guns:


From small part cleaning by hand, to wide area blowoff, and all points in between, EXAIR has a Safety Air Gun for most any application.

Our thumb gun user (as I alluded to above) chose the Model 1210 Soft Grip Safety Air Guns (top right). They had a number of typical industrial applications where the operators had the parts or surfaces to be blown off right in front of them. They liked the integral storage hook and rubberized hand grip, but the VariBlast Compact (top middle) or Heavy Duty Safety Air Guns (bottom left) were also considered. The VariBlast Precision (top left) and Super Blast Safety Air Guns (bottom right) were too focused or more powerful, respectively, than needed.

Airflow pattern: Honestly, I could make a good case for this being the first consideration. Selection of any blowoff product – be it an Air NozzleAir AmplifierAir KnifeAir Wipe, etc., will largely depend on the size and shape of the airflow.


    variety of airflow patterns…and effective distances…are available from EXAIR’s comprehensive line of Super Air Nozzle products.
    • For the most precise, focused blowoff, our Atto Super Air Nozzle (top left) is a great choice. It’s available on:
      • VariBlast Precision Safety Air Gun
      • VariBlast Compact Safety Air Gun
      • Soft Grip Safety Air Gun
    • For the typical industrial blowoff applications our thumb gun user had, the Model 1100 Super Air Nozzle (top right) comes on:
      • Soft Grip Safety Air Gun
      • Heavy Duty Safety Air Gun
    • Super Air Nozzle Clusters (bottom left) create higher force & flow, and still keep it in a more concentrated, tighter pattern. They can be installed on:
      • Soft Grip & Heavy Duty Safety Air Guns (4-Nozzle Cluster only)
      • Super Blast Safety Air Gun
    • When stubborn, heavy, and/or LOTS of debris needs to be absolutely, positively blown off RIGHT NOW, our High Force Super Air Nozzles may be just what you need. Our largest; Model 1120 1-1/4 NPT Super Air Nozzle, is shown (above right). The High Force Super Air Nozzles are offered on:
      • Soft Grip or Heavy Duty Safety Air Gun (up to 3.3 pounds of force over a 6.3″ wide area @12″ away)
      • Super Blast Safety Air Gun (up to 23 pounds of force over a 15″ wide area @12″ away)

    Application specific concerns: Everything we’ve discussed so far has involved aiming the blow off stream away from the operator, in the direction the device is aimed. In addition to wide variety of engineered Air Nozzles, EXAIR offers a number of options for these products:

    • We can add 12″ or 20″ extensions, and/or Chip Shields, to our VariBlast Precision Safety Air Guns.
    • VariBlast Compact Safety Air Guns can likewise be fitted with Chip Shields, as well as:
      • Rigid extensions, up to 72″ long.
      • Our Atto Back Blow Nozzles, with extensions up to 36″ long.
    Atto Back Blow Nozzles can blow out recesses or holes as small as 1/4″ in diameter.
    • Soft Grip Safety Air Guns are the most versatile, as far as options go. In addition to Chip Shields, we also offer:
      • Rigid Extensions, up to 72″ long.
      • Stay Set Hoses, for blowoff in hard to reach areas or spaces, in lengths from 6″ to 36″.
      • Back Blow Nozzles for holes with 7/8″ to 4″ diameters, on extensions up to 72″ long.
      • Super Air Scrapers, with extensions from 6″ to 72″ in length.
      • Scrape off, and blow away, stubborn debris with the Model 1244-48 Soft Grip Super Air Scraper.
        • Heavy Duty Safety Air Guns can be fitted with Chip Shields, Rigid Extensions (up to 72″ long) and Back Blow Nozzles as well.
        • We can add 3 foot or 6 foot extensions to our Super Blast Safety Air Guns for extra reach, when necessary.

        If you’re looking for a portable, hand-held compressed air blow off product that’s quiet, safe, and efficient, look no further than EXAIR Corporation’s extensive line of Safety Air Guns. If you’d like to find out more, Contact us.


    Vivek Engineers
    #22, 1st Floor, 1st Cross, Adj. to IIMB Compound, Bilekahalli Indl. Area, 
    Bannerghatta Road, Bangalore - 560 076 
    Ph : 080 -  2648 1309, 4170 1145.
    Mob : 097404 39220






        


    Monday, 19 July 2021

    High Lift Reversible Drum Vac


     EXAIR’s High Lift Reversible Drum Vac system is a liquid only vacuum system that can attach quickly to any closed head 30, 55 or 110 gallon drum.  It features a high-powered, robust vacuum that is able to lift liquids that are 1400 cP (Centipoise) or less up to 15′ vertically. You can normally see it emptying coolant sumps and aiding to recycle machine fluids.


    It can fill a 55 gallon drum in less than 85 seconds!  With the simple turn of a knob, the same stainless steel pump reverses and will empty the same drum.

    The High Lift Reversible Drum Vac is no different from Exair's other industrial vacuums as it requires no electricity and has no moving parts so you are assured maintenance free and reliable operation.  Since it is compressed air powered it can be operated continuously in heavy industrial applications without problems due to motor wear or clogged impellers.  The High Lift Reversible Drum Vac operates quietly, safely and efficiently.  For additional convenience the pump incorporates an automatic shut-off valve to prevent over-filling.

    The High Lift Reversible Drum Vac is available in 3 sizes to fit 30, 55 or 110 gallon drums and 3 different configurations.  The first option is the 6195 High Lift Reversible Drum Vac System,  this can be thought of as the entry-level model since it includes only the basic compliment of components to get you started.


    The next model up is the 6295 Deluxe High Lift Reversible Drum Vac System which adds a wider variety of pick up tools that includes the versatile Spill Recovery Kit, Magnetic Tool Holder and Drum Dolly.  As with 6195 above it is also available to fit a 30, 55 or 110 gallon drums.



    Finally the 6395 Premium High Lift Reversible Drum Vac System includes everything you receive in the 6295 Deluxe System and adds Heavy Duty Aluminum Tools, Compressed Air Supply Hose with Pressure Gauge and the Drum/Lid Assembly as shown below.  This all-inclusive model makes it easy to tackle any liquid clean up or liquid transfer need you may have.  The 6395 is available with either a 30, 55 or 110 gallon drum.
    If you would like to discuss the EXAIR High Lift Reversible Drum Vac, another Industrial House Keeping Product or any of our quiet Intelligent Compressed Air® products, give us a call as given in address.


    Vivek Engineers
    #22, 1st Floor, 1st Cross, Adj. to IIMB Compound, Bilekahalli Indl. Area, 
    Bannerghatta Road, Bangalore - 560 076 
    Ph : 080 -  2648 1309, 4170 1145.
    Mob : 097404 39220






        

    Wednesday, 16 June 2021

    EXAIR’s Air Nozzles & Jets: The Engineered Alternative to Cheap or Homemade Blowoffs


     If one of your goals is to reduce air consumption in your facility, look no further than EXAIR’s Engineered Air Nozzles & Jets. By upgrading your blowoff, cooling, and drying operations to use one of our Super Air Nozzles or Jets you can save as much as 80% of your compressed air usage when compared with an inefficient solution.

    EXAIR engineered nozzles are designed to optimize your compressed air system by entraining ambient air along with the supplied air, providing maximum force on the target. Inefficient solutions are commonly used in the form of cheap, plastic nozzles and sometimes even worse, open pipes or tubes. An open copper pipe or tube, even if “flattened” as we’ll commonly see, wastes an excessive amount of compressed air. This wasted compressed air can create problems in the facility due to unnecessarily high energy costs and the pressure drop that can be experienced affecting other processes. In addition to simply using too much compressed air, an open pipe or tube will often produce sound levels in excess of 100 dBA. At these sound levels, according to OSHA, permanent hearing damage will occur in just 2 hours of exposure.

    By simply replacing the open tubes/pipe or inefficient solutions with an EXAIR Super Air Nozzle, you can quickly reduce air consumption AND reduce the sound level. Sound level isn’t the only thing an OSHA inspector is going to be concerned about regarding an open pipe blowoff, in addition OSHA 1910.242(b) states that a compressed air nozzle used for blowoff or cleaning purposes cannot be dead-ended when using with pressures in excess of 30 psig. I don’t know if you’ve ever tried to use an air gun with 30 psig fed to it, but the effectiveness of it is dramatically reduced. This is why there needs to be a device installed that’ll prevent it from being dead-ended so that you can operate at a higher pressure.


    EXAIR’s Super Air Nozzles are designed with fins that serve two purposes. They help to entrain ambient air from the environment, allowing us to maximize the force and flow from the nozzle but keeping the compressed air consumption minimal. In addition, these fins are what prevents the nozzle openings from being completely blocked off. Using an OSHA compliant compressed air nozzle for all points where a blowoff operation is being performed should be a priority. Each individual infraction will result in a fine if you’re unfortunate enough to be the victim of an unannounced OSHA inspection.

    EXAIR carries a wide range of sizes and materials of nozzles, so you should have no trouble identifying one suitable for your application.If the savings in compressed air alone isn’t enough incentive, some energy providers offer rebate programs for the implementation of an engineered compressed air nozzle. If you need help selecting the best nozzle for your process, give us a call. An Application Engineer is ready and waiting to help analyze your process and recommend the best option.

    Vivek Engineers
    #22, 1st Floor, 1st Cross, Adj. to IIMB Compound, Bilekahalli Indl. Area, 
    Bannerghatta Road, Bangalore - 560 076 
    Ph : 080 -  2648 1309, 4170 1145.
    Mob : 097404 39220

    Tuesday, 1 June 2021

    EXAIR Digital Flow Meters

    This blog is about the costs of compressed air and how to use it more efficiently. How can you determine the costs of your compressed air? The first step you’ll need to take is to put a number to how much compressed air you are currently using. In order to do that you’ll need a measurement tool such as the EXAIR Digital Flowmeter.

    The Digital Flowmeter is available from stock for use on Schedule 40 pipe with sizes ranging from ½”-4” I.D. Sizes up to 8” for Schedule 40 and ¾”-4” for copper pipe are also available. Metric sizes are also available for 25mm, 40mm, 50mm, 63mm, 76mm, and 101mm. With a digital readout display, it’s easy to accurately monitor your compressed air usage throughout the facility. Creating a baseline of your usage will allow you to understand your compressed air demand, identify costly leaks, and replace inefficient air products.

    The Digital Flowmeter installs in minutes with help from a drill guide and locating fixture to assist in mounting the Digital Flowmeter to the pipe. Two flow sensing probes are inserted into the drilled holes in the pipe. The meter then seals to the pipe once tightened. There is no need to cut, weld, or do any calibration once it is installed. With blocking rings also available, installation can be permanent or temporary. Below is a easy to follow video on how to install EXAIR’s Digital Flow Meter!


    The newest addition to this product line is the Digital Flowmeter with wireless capability. Using a ZigBee® mesh network protocol, data is transmitted to an Ethernet connected gateway. This allows you to mount the Digital Flowmeter in areas that you may not be able to easily access and wirelessly monitor and graph the usage with the EXAIR Logger software. 


    Wireless output gives you the freedom to track air usage data from any computer!

    In addition to communicating wirelessly with the gateway, the Digital Flowmeters can “piggyback” off of each other to extend their range. Each meter has a range of 100’. Using multiple Digital Flowmeters within the same ZigBee® mesh network, data can be passed from meter to meter to extend the distance over which the meters can operate. These can be installed on each major leg of your compressed air system to continuously monitor usage throughout the facility.

    If you’d rather go with a hard-wired data collection method, the Digital Flowmeter is also available with a USB Data Logger. Simply remove the Data Logger from the Digital Flowmeter and connect it to the USB port of your computer. The data can then be viewed directly in the accompanying software or exported into Microsoft Excel.


    Add a Data Logger for easy Value Tracking
    Two special flow meter options we now offer are the Pressure Sensing Digital Flowmeters, and the Hot Tap Digital Flowmeters!

    Pressure Sensing Digital Flowmeters help by generating a pressure and consumption profile of a system can help to pinpoint energy wasters such as timer-based drains that are dumping every hour versus level based drains that only open when needed. Hot Tap Digital Flowmeters offer a way to install a flow meter on a pipe that is currently under pressure. It uses a series of valves and mufflers to maintain a safe working environment for the installer.

    Vivek Engineers
    #22, 1st Floor, 1st Cross, Adj. to IIMB Compound, Bilekahalli Indl. Area, 
    Bannerghatta Road, Bangalore - 560 076 
    Ph : 080 -  2648 1309, 4170 1145.
    Mob : 097404 39220