High Lift Reversible Drum Vac Overview

I remember the days when a hydraulic hose would burst and start filling the pit below our machine. There would be a slurry of water, oil and dirt. At the time we would simply use mops, buckets and a water pump causing risk of injury, excessive labor and inefficiencies. That is until I discovered EXAIR and their options for Industrial Housekeeping products. I purchased the High Lift Reversible Drum Vac and can certainly tell you I made a lot of friends the day it was delivered.

The crew was in the middle of a clean-up situation with a few guys down in the pit connecting a water pump. I showed them the new solution, an EXAIR High Lift Reversible Drum Vac. They climbed up the ladder from the 6 foot pit and raved over this new toy. They hooked up the compressed air, assembled the wand extension to the vacuum hose and began lifting the liquid mess into our 55 gallon drum. When the drum filled and the auto shut-off stopped the unit I then realized that I should have purchased the 110 gallon drum. No problem, the 110 gallon was stock item so I purchase the new drum and lid as the components from the 55 gallon were fit on the 110 gallon lid. The guys were elated and now enjoyed cleaning with this great piece of vacuum excellence.

EXAIR has more than a few options for Industrial Housekeeping products but in this case the High Lift Reversible Drum Vac was the right fit for my project. This high-powered vacuums able to lift liquids up to 15 feet and fill a 55 gallon drum in less than 85 seconds. With a turn of the knob , the same stainless steel pump evacuates the liquid from the drum. This unit has no moving parts and does not require electricity as it operates from compressed air.

Besides below grade pits as I used it, other applications include but not limited to; below grade sumps, deep wells, underground storage, drains, deep hole broaching, bulk storage tanks and cisterns.

The High Lift Reversible Drum Vac comes in 30, 55 and 110 gallon sizes and with different options as shown in the phot above. If you have Industrial Housekeeping needs and not sure which product is best for you, please contact any of our Application Engineers.

Eric Kuhnash
Application Engineer
E-mail: EricKuhnash@exair.com
Twitter: Twitter: @EXAIR_EK

Super Air Wipes For Reliable Blow Off In Harsh Environments

I saw a fake ad on a humor/satire website for a “wood fireplace” recently. The photo showed what looked like a typical home fireplace, except the whole thing – the frame, grill, flue, and chimney – was made of 2×4’s and plywood. It looked to be well crafted and expertly built, and I bet it would have worked great…once.

It was definitely funny…here I am, a week or so later, still getting (and sharing with you, dear reader) a chuckle out of it. There were two takeaways for me: One, I’m easily amused. And two, there is DEFINITELY a reason why many products are made of certain materials. Like, how the fireplace in MY house is made of iron & brick.

…and not just any old bricks, but specially made ones called refractory (or fire) bricks. Because specific material of construction can be VERY important.

Then there’s the EXAIR Air Wipe product line. Our Standard Air Wipes are made of aluminum. They’re fitted with steel hardware, polyester shims, and have a PVC/rubber & brass connector hose assembly. As long as they’re not exposed to anything that’s particularly corrosive, or in a hot environment – they’re rated to 150°F (66°C) – they’re going to work just fine.

EXAIR Standard Air Wipe family. Sizes up to 4″ (102mm) come with a connector hose. Larger sizes must be plumbed with compressed air to the supply port on each half.

For more aggressive conditions in the Air Wipe’s area of installation, though, we’ll consider the Super Air Wipe:

  • We offer the body in two different materials: aluminum is good for up to 400°F (204°C), stainless steel is good to 800°F (427°C).
  • Either way, it comes with stainless steel hardware & shims, and a braided SS connector hose.
EXAIR Super Air Wipe Family. Sizes up to 4″ (102mm) come with a SS braided connector hose. Same as the Standard Air Wipes, 5″ (127mm) and larger Models are individually plumbed to each half. Aluminum bodies come in sizes from 3/8″ (10mm) to 11″ (279mm), and Stainless Steel bodies go from 3/8″ (10mm) to 4″ (102mm).

Here are some prime examples of the “more aggressive conditions” that are great fits for the Super Air Wipe:

  • Blowing off seawater from mooring cables on oceangoing vessels:
Reeling in this cable through an unprotected hatch carried seawater into the reel compartment. A Model 2404SS 4″ SS Super Air Wipe now dries the cable as it enters, solving a number of corrosion & maintenance problems.
  • Removing cutting oil from machined parts:
EXAIR Model 2407 7″ Aluminum Super Air Wipes remove cutting fluid from CNC machined parts. The oil-based fluid was contaminating robotic welders’ cover windows & lenses, which cost a lot of time (in cleaning the windows & lenses), and money (to replace the windows as the fluid attacked them, causing them to cloud & haze).
  • Cooling extruded tubing:
Tubing coming out of extruder was hot & pliable, and would slump or sag upon exit. An EXAIR Model 2401 1″ Aluminum Super Air Wipe cools it to prevent it from slumping, which made it so crooked it had to be tossed out as defective.
  • Blow off AND creating an environmental barrier:
An EXAIR Model 2404 4″ Aluminum Super Air Wipe not only blows off a steel rod during processing, it also contains smoke and oil mist from the machinery.

Super Air Wipes come in sizes from 3/8″ (10mm) to 11″ (279mm) with the Aluminum bodies, and 3/8″ (10mm) to 4″ (102mm) in Stainless Steel. Kits include a Shim Set to make gross adjustments to the flow & force, an Automatic Drain Filter Separator to keep the air supply clean & moisture free, and a Pressure Regulator to “dial in” the performance. If you have a particular application you’d like to discuss, or to find out more about our Air Wipes (or any of our engineered compressed air products, for that matter,) give me a call.

Russ Bowman, CCASS

Application Engineer
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Understanding Deliquescent Dryers

Deliquescent Dryer

Deliquescent dryers can sometimes be confusing. Some compressed air dryer vendors use the terms deliquescent and desiccant synonomously as if they were interchangeable in describing their equipment. The deliquescent dryers are not a complex drying system and found most commonly in the petrochemical industry.

Unlike any other dryer, a deliquescent dryer is also used to reduce or remove moisture before it turns to liquid water. These dryers can be installed indoors, outdoors, offshore or any remote location. They do not require electric for operational purposes or have any moving parts, making them easy to maintain and economically more efficient. In a deliquescent dryer, moist air (gas) passes over a layer of deliquescent tablets which absorb moisture from the air. The pressure dew point lowers as the tablets slowly dissolve, the condensation falls into the drain area, and the drier air flows through the outlet into the piping system.

The best deliquescent materials are salts with a strong attraction for moisture. Deliquescent desiccants (drying tablets) are formulated from calcium chloride, magnesium chloride, potassium chloride and lithium chloride. Not all deliquescent desiccants are equal. The final formulation and properties of the desiccant can have significant impact on the design of a dryer tank. That is, the surface of the desiccant chemical, often beads or pellets, will liquefy, and the resulting liquid will flow to the bottom of the vessel. There is either a drain (manual or auto) at the base of the deliquescent dryer which is used to expel the collected fluid.

Some factors that will affect the consumption of the desiccant are the type of adsorbent, type of adsorbate, the size of the adsorbent bead or pellet, the concentration of the adsorbate in the compressed air stream, and the temperature of that air stream.

You will want to have a water trap, also known as a general purpose compressed air filter plumbed in line just upstream from the deliquescent dryer. Otherwise, any liquid water flowing with the compressed air into the air dryer will make short work of the desiccant chemical, requiring a more frequent – and expensive – recharge.

The compressing of air generates heat. That hot, moist compressed air will consume the desiccant chemical in the deliquescent dryer much more quickly. Best practice is to ensure the air flow to the dryer is as cool as possible with, if possible, a long air line and a dwell tank prior to the deliquescent dryer to allow the air to cool and have water saturate out naturally.

A deliquescent dryer can be expected to reduce the compressed air dew point by 20 – 30 deg. F, or so. The degree of drying depends how saturated the airflow is going in and on the type of deliquescent chemical used.

Unlike other forms of compressed air dryers, a deliquescent unit doesn’t guarantee the air will reach a certain dew point. The amount of water vapor in the air that exits the dryer is completely predicated on how much water vapor is in the air going into the dryer.

I hope this helps increase your understanding of deliquescent dryers. EXAIR has many Intelligent Compressed Air tools and accessories. We would love to help you learn more about our products. Please contact us as we are eager to help.

Eric Kuhnash
Application Engineer
E-mail: EricKuhnash@exair.com
Twitter: Twitter: @EXAIR_EK

Gen4 Ion Air Cannon Explained

When larger areas need to be covered with an ionized air stream and the surfaces needing to be covered are not flat, then an array of Gen4 Ion Air Cannons can often be the solution. This is something that the automotive industry as well as many others have been using since before I have been a part of the EXAIR team. So just how does the Gen4 Ion Air Cannon achieve this?

At its core, the Gen4 IAC is designed around a 2″ Super Air Amplifier, and then we add ionization and a stand. The largest benefit to this is the ability of the Super Air Amplifier to entrain large volumes of free ambient air while using small amounts of compressed air. By entraining large volumes of free ambient air and then directing it down through the throat of the IAC and ionizing it upon exit of the barrel, we maximize the potential to eliminate static on the target surfaces and provide a good blowoff at the same time. To give a visualization of the performance, check out the video below.

When adding ionization to this airstream, complex shapes can easily have static elimination as they are being conveyed. Take an automotive body for example, as it travels down the assembly line, before paint or primer, they get blown off to ensure any debris from the facility is removed before they are coated. An array of Ion Air Cannons can be installed at a distance from the surface to fit multiple vehicle models and still target the entire surface needed.

Three Gen4 Ion Air Cannons are used to blow off the debris and remove unwanted static charge from a primer vehicle body before painting.

By arranging the blow-offs to utilize the large volume of ambient air entrained and direct the airflow at an angle in which once it hits the surface, it expands in the direction needed to remove the debris it is easy to cover irregular shapes. The setup shown above will utilize 15.5 SCFM per IAC when operated at 80 psig and give a forceful blast to remove any debris on the surface; the total consumption would be 45.5 SCFM at 80 psig to remove all debris from the top surfaces of this vehicle body before it goes into the final paint area. A centrally located 4 port Gen4 Power Supply, model 7961, can simplify cabling and installation while powering all three Ion Air Cannons. To optimize compressed air usage, an Electronic Flow Control can easily be installed to shut the air off whenever a car is not present; adding something like this ionized blowoff station to existing equipment is easier.

If you would like to discuss what the Gen4 Ion Air Cannon kit or any of our point-of-use engineered compressed air products can do for you in your facility, please contact an Application Engineer today.

Brian Farno
Application Engineer