A demolition company was looking for a way to remove the liquid from sumps and tanks in the industrial buildings they were contracted to provide their service upon. The liquids in question were mainly coolant and oil that had been left behind when the machinery was removed…anything that could be re-used was already gone; this was the “bitter dregs,” as it were. Since these buildings are about to be demolished, electricity is rarely available.
They had a pumping system that ran off a diesel engine that they COULD take with them, but they ALWAYS had a large mobile air compressor for the pneumatic tools used in other processes in the demolition of the building. Since they had steel drums in abundance, the Reversible Drum Vac Systems sounded very attractive to them, so they got a Model 6295 Deluxe High Lift Reversible Drum Vac System for 55 Gallon Drum to try out.
Now, instead of committing an additional truck (and driver) to getting the diesel engine driven pumping system to the site, they simply move the Reversible Drum Vac pump unit from 55 gallon drum to 55 gallon drum as they’re filled. Once the drums are returned to their facility, they switch the the Reversible Drum Vac to the “empty drum” configuration, and use it to pump the liquid out into their recycling tanks, where they await collection and processing by their waste handling service. Even when they have to use a number of drums, the High Lift Reversible Drum Vac Systems still streamline the process over the use of the diesel engine pumping system.
If you’d like to find out more about our Industrial Vacuums, or any of our compressed air operated products, give me a call.
As an Application Engineer at a direct sales manufacturing company, I get to talk to a LOT of people about potential uses for our quiet, safe, and efficient compressed air products. And, I’m happy to say, most of them I can even help with…even if the answer is “that’s just not gonna work.” Those are few and far between, however, and we can usually point someone in a better direction in those cases.
By the time we’ve “drilled down” into an application discussion far enough to make a product recommendation, we’ve got a pretty good feeling about it, and a vast majority of the time, our product solves the application in a big way. So big, in fact, that it makes them think of EXAIR again, and again.
Case in point: not long after I started here in 2011, I had the pleasure of helping someone out with some pick-and-place rigs on their packaging line…small products, bulk packaged for shipment to retail outlets. They used our Model 810003M E-Vac High Vacuum Generator and 900762 Small Round Vacuum Cups. Over the years, they’ve added some new products, and some more of the E-Vac pick-and-place rigs. It’s always good to hear from them, and I really believe the feeling is mutual.
Now, they want to automate a little clean-up operation where pilot holes are drilled in a plastic part, and are considering an intermittently operated vacuum. The concern is, if they use an electric powered one, the starting & stopping will take a toll on the motor. And they’re right.
So, the Model 6193-5 Mini Chip Vac System is up for consideration. Because it’s compressed air operated, constant starting & stopping is no problem…and, it’s generating vacuum immediately, so it’s ideal for quick bursts of cleanup suction action. No electric motor to burn out, no moving parts to wear – it’s a long term, maintenance-free solution.
EXAIR has been manufacturing Intelligent Compressed Air Products since 1983. We work every day with air properties, such as compressed air pressures and flow rates, when evaluating product performance to provide a solution to a customer problem. We also need to be versed on a certain liquid property, viscosity, as it relates to the operation of (2) of the EXAIR product families, the Atomizing Spray Nozzles and the Industrial Housekeeping liquid vacuums (Reversible Drum Vac and Chip Trapper).
Viscosity is often referred to the thickness of a fluid. A common example would be water and honey. Water is a low viscosity fluid, while honey is a high viscosity material.
Dynamic, Shear, or Absolute Viscosity is a measure of the resistance to shearing flow. If you think of 2 plates (see below) with the bottom one stationary and the top one moving horizontally, and with a fluid between them – this illustrates Absolute Viscosity. When the top plate moves to the right, there will be induced multiple horizontal layers of the fluid, each moving at different speeds (the fluid will be at rest at the bottom, and the top layer will move with the top plate.) The friction generated between the layers will give rise to a force resisting this motion. The force is proportional to the speed and area of the plate and inversely proportional to the distance between the plates.
In simplest terms, viscosity is the ratio of the shear stress, τ, to the velocity gradient du/dy. Of concern to us, it takes more force to cause a very viscous (thick like honey) fluid flow.
Centipoise, cP, is the common unit of measure for viscosity, and 1 cP is equal to 0.01 g/cm/s.
Water has a viscosity of 1 cP at room temperature and honey ranges from 2,000-10,000 cP.
How does all this relate to EXAIR? It relates to EXAIR because we engineer products to specifically move and use liquids. There are limitations to the viscosity each of these products can handle and still perform well.
The EXAIR Atomizing Spray Nozzles can be used with liquids up to 800 cP. The Internal Mix type nozzles can be used on liquids up to 300 cP. The External Mix nozzles can be used with liquids over 300 cP and up to 800 cP. Lastly, the Siphon Fed models are good to 200 cP, and do not require a pressure source for the liquid. Each nozzle type will atomize the fluid and provide a very small droplet size, which is ideal for washing, rinsing, coating, cooling and other applications. Exceeding the cP each of these nozzles are designed to use will result in larger droplet sizes and a more inconsistent fluid flow, which may impact your process.
The other EXAIR product family where viscosity is important, is the Industrial Housekeeping Products, especially the High Lift Reversible Drum Vac and High Lift Chip Trapper. They are capable of moving liquids with viscosities of up to 1400 cP through 20′ of hose. Simply provide compressed air and turn any closed head drum into a high powered liquid vacuum. Great for coolant, hydraulic oils, waster water, and many other fluids. For these products, as the cP increases, so does the time it will take to move the liquids into or out of the drum.
To discuss your fluid viscosity and how an EXAIR Intelligent Compressed Air Product can make your process better, feel free to contact EXAIR and myself or one of our other Application Engineers can help you determine the best solution.
Although most folks think of Henry Ford as the inventor of the assembly line, there’s evidence that “division of labor” was practiced in ancient China, where metal products were mass produced by skilled workers performing a specific evolution and then passing it on to another person for the next step. In fact, Oldsmobile’s assembly line actually predates Ford’s by a few years, but a host of innovations by Henry Ford and his team of engineers reduced the assembly time of a Model T from a day and a half, to an hour and a half. Maybe that’s why he gets so much credit for it.
Through the 20th Century, technological advances continued to revolutionize the process. Automation and robotics have allowed a combination of speed & precision that would have impressed even Henry Ford. The guy was a genius, so he would have caught on pretty quick, I’m sure. If you hadn’t guessed, it, yeah; I’m a big fan.
EXAIR products are used for a variety of applications on assembly lines…blow off, static elimination, painting/coating, and even cleanup. I had the pleasure of assisting a user with that last one recently.
Turns out, they make automobile windows, and in the process of handling the glass windows, the metal & plastic frame pieces, the rubber seals, the protective tape, etc., they end up with a LOT of scrap as these parts go down their assembly conveyor. According to this caller, it looked like “New Year’s Eve at the end of every shift” when they stopped to clean up. By installing EXAIR Model 130200 2″ Light Duty Line Vacs at strategic locations, they’re able to pick up almost all of the debris from the whole process.
Having a background in industrial process pumps prior to my time here at EXAIR, I have become quite familiar with many different abbreviations used in the selection of a motor for a particular process. Terms like ODP – Open Drip Proof or TENV – Totally Enclosed Non-Vented all refer to the NEMA rating of an electrical motor. Since all of the products we manufacture here at EXAIR are compressed air operated and don’t require any electricity or motors to operate, these terms haven’t been as frequent in my day to day conversations with our customers.
However, last week that changed when I took a call from an industrial motor manufacturer looking for a way to draw cast iron chips out of the fan covers used on their “TEFC” motors or Totally Enclosed Fan Cooled. A TEFC motor, the most commonly used motor in general duty, industrial processes, has an external fan on the back of the motor and provides cooling by moving air over the outside of the motor housing. After the fan covers are formed, they are sent to a mill where the vent holes are cut, which creates small chips that settle on the inside and outside of the cover. They have been using an air gun to blow the chips away but some of the chips have made their way behind the fan blades and settled on the shaft, resulting in damage to some fans and motors themselves during testing. They wanted some type of small, handheld device that would allow them to treat the individual opening and grooves on the cover to vacuum the chips away and carry them to a scrap recovery bin.
Once again, EXAIR had the perfect solution, the Model # 6292 Vac-u-Gun Transfer System. The Model # 6292 Transfer System includes the Vac-u-Gun, a 10′ transfer hose, extension wands and additional crevice, brush and skimmer tools. A Vac-u-Gun is an air gun which can used as both a blow gun to blow away debris or a hand held vacuum to suck debris into a filter bag or moved through a hose into a collection vessel (drum, tote, garbage can). This would provide them with the desired handheld device that would easily allow them to transfer the scrap chips the to their scrap recovery bin.
The Vac-u-Gun, like most of our products, are IN STOCK, ready to ship. Give me a call for help with product selection or to discuss your particular process.
Over the past few weeks I’ve been going back and forth with my phone provider over some technical issues I’ve been having with the device. After some troubleshooting, we were able to conclude that the antenna has likely become loose, leading to the phone periodically not receiving service. Naturally, we’re outside of the 1-Year “Warranty” period that covers a defective device. I paid my insurance deductible and received a “refurbished” phone the following day. Unfortunately, this refurbished phone was unable to take pictures with the front-facing camera. I know what you’re thinking, how on Earth can I take selfies without a front-facing camera? So it was back to the phone provider to get another replacement, fortunately this time they sent a brand new device.
There’s nothing more frustrating than trying to get something to work right out of the box, only to experience issues. Whenever a customer is having an issue with a particular product, there’s a certain progression that we go through in order to assess the problem and determine the root cause. In some cases it is something simple, others it can be a few individual problems that are compounding each other. I recently assisted a customer that was having problems with his 110 Gallon Reversible Drum Vac System. He was having difficulty pumping water out of a container and into the 110 gallon drum. He stated that he just received the unit and was unable to get it to work.
This is a call that we get from time to time, and is generally remedied pretty quickly. Our first step is to check the air pressure at the inlet of the Reversible Drum Vac while it is operating. We recommend an inlet pressure of at least 80 PSIG for proper operation. By installing a pipe tee with a pressure gauge directly at the unit, we can not only verify the inlet pressure but also that the Reversible Drum Vac is being supplied with an adequate volume of compressed air. If the pressure on the gauge begins to decrease once the unit is in operation, we can conclude that the volume of compressed air to the Reversible Drum Vac is insufficient. This can be due to the use of restrictive quick disconnect fittings, improper line size, or a compressor that is undersized.
If the air supply is sufficient, we then inspect the system for vacuum leaks. If the drum does not have a complete seal, the system will not function. If there’s no vacuum leak and there is an adequate supply of compressed air, the Reversible Drum Vac likely needs to be cleaned. It took us a few tries to get there but through a little bit of trial and error, we were able to determine that this was exactly the case in this scenario. Even though the system was new, it had been supplied with compressed air that was not properly filtered. Some scale, rust and debris from the customer’s supply lines made its way into the body of the Reversible Drum Vac, impeding the flow of air. Here is a video that shows the cleaning procedure for the Reversible Drum Vac. Over time the Reversible Drum Vac can accumulate debris inside of the plenum chamber. Regular maintenance of the unit will ensure that it stays within specifications for when it’s needed most!
If you have an EXAIR product that’s not performing as well as it used to, give us a call. One of the Application Engineers will be able to walk you through the steps to ensure that you’re getting the most out of our products!
Last week, as Mother Nature was doing her typical dance between warm, almost Spring like days and then quickly reverting back to her Winter ways, the southwestern Ohio area was hit with a powerful storm. Luckily, my neighborhood area was spared the really strong winds and tornadic activity that nearby areas experienced. We did however receive a decent amount of rainfall.
Every Spring when the ground is still slightly frozen, the first good rain always leads to some water leakage into my basement. The water comes in through the gaps between the floor and the walls and even seeps up through some of the floor cracks. I have my theories as to why it only happens in the spring, but I’ll save that for another day. As the blog title says, I wish I had taken home a Reversible Drum Vac with me.
EXAIR manufactures the Reversible Drum Vac (RDV) System, which attaches quickly to to any 30, 55, or 110 gallon closed head drum. The Mini Reversible Drum Vac has the same great performance and comes complete with a 5 gallon drum. Coupled with the Spill Recovery Kit, using the RDV to vacuum up the rain water would have been a short and simple process. Using a mop, towels, fans and a dehumidifier took much longer and still did not get everything dry.
The compressed air operated Reversible Drum Vac System is a high powered vacuum that can fill a 55 gallon drum in less than 2 minutes, and with a simple turn of the a knob, the same stainless steel pump quickly empties the drum. With no electric motor to wear out, or impellers to clog, the RDV is designed to work in industrial environments. An automatic safety shutoff valve prevents the system from over-filling.
EXAIR also manufactures systems made for cleaning up solids, such as machining chips and other debris.
To discuss your application and how the EXAIR Industrial Housekeeping Products can be a benefit at your facility, feel free to contact EXAIR and myself or one of our other Application Engineers can help you determine the best solution.