When To Use The High Lift Reversible Drum Vac vs. The Reversible Drum Vac

One of my favorite TV shows growing up was Home Improvement with Tim Allen. One of the most memorable parts of the show was when Tim’s character would always state that when doing a job you need … MORE POWER!!!

In real life and within a production environment this is not always true. More often than not more power equals waste and inefficient use of the resources at hand. I know, I sound a lot like Tim Allen’s counterpart in the show, Al Borland. Well, the truth is, Al was usually right.  Here at EXAIR, we offer two different types of Reversible Drum Vac, the standard unit and the High Lift RDV.

The Reversible Drum Vac System converts a drum and dolly into a mobile pumping system.

The standard RDV will pull up to 96″ of water column when in suction mode. This is ideal for water-soluble coolants or other water-based rinses. The unit is paired with a 10′ vacuum/discharge hose to ensure optimal performance. The RDV will fill a 55-gallon drum with water in 90 seconds or less when operated at 80 psig inlet pressure. It will then empty the same drum even faster by discharging liquid at up to 166″ of water column displacement. To do both of these operations, fill or empty the drum the RDV will utilize 19 SCFM of compressed air. This is easily supplied within most industrial applications where that amount of compressed air usage can be overlooked.

EXAIR’s High Lift RDV makes cleaning out pits up to 15′ deep easy and fast.

If Binford manufactured a compressed air liquid vacuum, it would be the High Lift Reversible Drum Vac. This is the, “More Power” version of the RDV and can pull up to 180″ of water column when in vacuum mode. This can pull water-soluble coolants up to 15 feet below grade for those large machining centers that sit over the top of a coolant pit or those large footprint machines where a 20′ hose is needed to reach into and around the parts of the machine to where the coolant or liquid is housed. Another application would be for oil-based coolants or other petroleum-based oils/higher viscosity fluids. This will still discharge liquids at 166″ of water column when in positive displacement. The unit will outperform its predecessor and that comes with higher utilization of compressed air. While operating at 80 psig inlet pressure the unit will consume 43 SCFM of compressed air. This volume of air is still easily located within most industrial environments and is still less than the amount demanded by competitive units that do not offer the reversible feature of the High Lift Reversible Drum Vacs.

When it boils down to it, the High Lift Reversible Drum Vac will perform every task of the standard Reversible Drum Vac and will perform the vacuum portion of those tasks all faster due to the higher level of vacuum. When this higher level of vacuum isn’t needed, when the sump is at ground level and the coolant or liquid is around the viscosity of 50 weight motor oil or thinner then the standard RDV will work ideal for the application and would be the most efficient method to get the job done. When the liquid is higher viscosity or below ground level trying to pull it up out of a pit then the High Lift Reversible Drum Vac is the ideal tool to get the job done. Again, Al Borland had it right, more power is not always needed, sometimes it is better to keep it efficient.

If you would like to discuss your liquid vacuum application or any point of use compressed air application, please contact us. (Heck, I’ll even talk about Home Improvement if you are a fan too.)

Brian Farno
Application Engineer
BrianFarno@EXAIR.com
@EXAIR_BF

 

Best of Home Improvement so 1 eo01 More Power – @shary h – https://www.youtube.com/watch?v=ts9UONUMlCg

Adjustable E-Vac Saves Coolant

Many EXAIR Corporation blogs could use this formula as the title:

[EXAIR Intelligent Compressed Air Productsaves  [valuable commodity in customer’s facility]

Popular examples might be:

But how exactly does an Adjustable E-Vac Vacuum Generator save coolant?  Isn’t that what the Chip Trapper Systems do?  (It is, and that’s been covered extensively here, here, and-my personal favorite-here.)

Our E-Vac Vacuum Generators are probably most commonly used in pick-and-place applications, in conjunction with our Vacuum Cups.

From a lightweight manual operation to an automated system with large or heavy objects, the EXAIR E-Vac Vacuum Generators can solve the application.

The Adjustable E-Vacs, however, have a unique feature – a relatively large throat diameter – that makes them well suited for suctioning up liquids.  And I recently had the pleasure of helping a caller with just such an application.  They make machinery for the automotive industry, and in one particular operation, coolant gets left behind in ‘pockets’ of a particularly unwieldy piece.  They can drain most of it at the machine, but what gets left behind in these pockets makes a real mess as it goes to the next fabrication point, and, although it’s a small amount in each pocket, it adds up to a finite amount of wasted coolant.  It’s not practical to use an electric shop vacuum, but an operator could easily use a handheld device to suck up these little puddles.

Enter the Adjustable E-Vac…with the wide throat diameter I mentioned above and compact design, they were able to install a short suction hose (via a threaded push-in connector) to the vacuum port, and a little longer discharge hose to the exhaust port, and they have a quick and easy, portable, maneuverable coolant transfer system.  Here’s a short video I made in the Demo Room, once upon a time, showing how it works:

Saving air.  Saving coolant.  Saving money and time, one compressed air application at a time.  If you have one you’d like to discuss, give me a call.

Russ Bowman
Application Engineer
EXAIR Corporation
Visit us on the Web
Follow me on Twitter
Like us on Facebook

Two Vacuums For The Price Of One

I recently noticed on my mortgage statement that I own more of my house than the bank does now. That made me feel good, and it also gave me pause for a moment of reflection on all the adventures I’ve had as a suburban American homeowner.  Good times…then, another adventure happened:

I’m in the middle of a major (to me) construction project in our house. Now, if you’ve ever worked with drywall, you know that anything you do to it creates dust….sometimes in great volume. No worries, though – I’ve got a real nice portable wet/dry vacuum that makes light work of drywall dust & scrap. So, when I’m done for the day, I leave the area as dust-free and tidy as it was before (“tidy” is relative…there are two teenagers and a dog in my house.)

For the record, the dog was more interested in the new hole in the wall than the teenagers.
For the record, the dog was more interested in the new hole in the wall than the teenagers.

Anyway, the adventure happened last Saturday morning, when the basement sump high level alarm went off. I had to get the water out of the sump, and fast, so I could find out what was wrong with my sump pump. No problem…I’ve got that real nice portable wet/dry vacuum, right? That was full of drywall debris. So, I hastily dumped it into the garage trash can (making another mess I had to clean up later) and removed the particulate filter so I could drain the sump. Which it did, like a champ. It was a stuck float on the sump pump, which I remedied quickly, and all was well with the world again. At least in my (and my bank’s) almost 1/4 acre of it.

Speaking of the different things you can use vacuums for, I had the pleasure of talking with a caller the other day about industrial vacuum applications. When they wash down a particular area of their facility, they end up with puddles of water, mixed with lots of solid debris, all over the floor. They were using electric wet/dry vacuums (like mine) but had a recent scare involving a damaged power cord on a wet floor. Luckily, someone saw it before anything bad happened, but it made them think about other options…like compressed air operated Industrial Vacuums.

They looked at some dual Venturi systems, which would indeed replicate the function of their electric vacs, but at a considerable rate of compressed air consumption…over 100 SCFM (over 25HP worth of typical industrial air compressor load.) Their compressed air system simply didn’t have the capacity for this. They already had an EXAIR Reversible Drum Vac, and had plenty of capacity to run it since it only requires 19 SCFM @80psig (about 5HP worth of compressor load,) but it wasn’t greatly effective at picking up the solid debris. That’s where the EXAIR Chip Vac comes in to our story…it uses only 40 SCFM @80psig (about 10HP worth of compressor load) to clean up the solid debris that doesn’t get sucked up with the puddles of water & sludge that the Reversible Drum Vac takes care of.

Reversible Drum Vac (left) and Chip Vac (right) – two EXAIR Industrial Vacuums for lower cost (purchase AND operation) than wet-dry combo air operated vacuums.

And…(back to the title of this blog)…a Reversible Drum Vac AND a Chip Vac STILL cost less to purchase than the dual Venturi system they were looking at. Lower purchase cost. Lower operating cost. Two independent systems. That’s a win-win-win.  If you have wet…dry…or wet & dry…messes to clean up, give me a call.

Russ Bowman
Application Engineer
Find us on the Web
Follow me on Twitter
Like us on Facebook

How to Meet the OSHA Compressed Air Standard

Every day we talk to customers who need to comply with OSHA regulations for using compressed air to clean up their shop or product. Back in 1972 on Valentine’s Day, OSHA published Directive Number STD01-13-001 standard 1910.242(b), which strives to provide guidance on how manufacturers can safely use compressed air for cleaning purposes to comply with the Walsh-Healey Act of 1936.  This directive laid out acceptable methods for complying with 41CFR 50-204.8 and 29 CFR 1910.242(b)

The two methods are very simple, but still many people have questions.  The first method (pictured below) is to regulate the line pressure from the compressor to below 30 PSIG.

Regulator Method

Figure 1 Regulator method Photo Courtesy of osha.gov

The second method is to install a nozzle engineered to reduce the static pressure of the nozzle to less than 30 PSIG.

OSHA Nozzle Method

Figure 2 Nozzle method Photo Courtesy of osha.gov

The first method reduces the danger by limiting the energy in the system to less than an amount which can injure a person.  OSHA determined that 30 PSIG was the safe limit for the amount of pressure the human body could withstand without causing severe injury. The problem with this method is that cleaning with compressed air at 30 psig is virtually impossible.  Which means at such a low pressure the operator must pass the nozzle so close to the chips and debris, he might as well use a broom or pick each piece of debris up with his fingers. This first method I will label the regulator method. The second method introduces a relief valve at the nozzle, so that an operator cannot block off all of the openings of the nozzle, and build up any static pressure on their skin. I will call this the nozzle method.

Commonly and cheaply, the nozzle method is done by cross drilling a hole in an open pipe.  This is a sometimes effective method for protecting employees from static pressure, but it also is great at producing a tremendous amount of noise and wasting a lot of compressed air every year. The noise produced by even a ¼ pipe with a cross drilled hole fed with 80 PSIG can easily exceed 90 dBA and consume up to 140 SCFM. The noise can be even louder, if there are burrs or rough edges from drilling out the pipe.  This is also a violation of OSHA standard 29 CFR – 1910.95 (a), if the employee is not using hearing protection.

Air Nozzle work

To meet this OSHA standard, EXAIR’s solution is to engineer features which cannot be dead-ended into a wide variety of compressed air products. We do this a variety of ways depending on the product.  For the Super Air Nozzles, we utilize multiple small orifices which are protected by raised fins.  The multiple orifices offer an escape path for the air in case a single orifice is plugged. The fins protect the orifices so that no one person can block more than one orifice at a time.

So if you are worried about an OSHA inspector knocking on your door, or maybe you aren’t sure if you should be worried, contact us.  The Application Engineering team here will help you determine what engineered solution you need to keep those pesky fines away.

Dave Woerner
Application Engineer
Davewoerner@EXAIR.com
@EXAIR_DW