Static Eliminator Selection Example

I like jigsaw puzzles. I start with the outside…there’s something to be said for establishing the boundaries of any project…but I don’t necessarily work my way in from there. Oftentimes, a number of same-colored pieces go together quickly, and I make a little part of the big picture somewhere in the middle. If it’s a big enough picture and/or if there’s a sufficient number of pieces, I might get a few of those little parts going on, until some of them get joined together. Once that happens, the big picture develops faster & faster, and before I know it, the puzzle is solved.

As an Application Engineer for EXAIR, a jigsaw puzzle is an apt analogy for assisting a customer in selecting the right solution to an application. A recent situation proved what a good analogy this is: a caller from a custom label making shop needed to eliminate static from a bunch of thin Mylar film that was die cut into special little shapes so they could be laid out in specific arrangements. You know…like a jigsaw puzzle!

Now, there aren’t many better ways to generate a static charge than doing ANYTHING to Mylar. The magnitude of static charge created by the cutting process is downright vicious. As difficult as it was to put the first piece in place, it was IMPOSSIBLE to keep it there when they put the NEXT piece down adjacent to it. Same thing with the piece after that, and the piece after that, etc. They needed something to remove the static, and that something turned out to be an EXAIR Ion Air Knife. By installing a Model 8106 6″ Gen4 Standard Ion Air Knife along one side, they were able to gently blow a ‘whisper’ of ionized air that moved the freshly cut pieces from the die cutter’s platen so the operator could then lay them out to make the desired label design.

Gen4 Standard Ion Air Knife

So, how did we arrive at the Gen4 Standard Ion Air Knife? Wouldn’t the more efficient & quieter Super Ion Air Knife be the “go to” solution? In an awful lot of cases, it certainly is. A couple of things made the Standard Ion Air Knife more attractive here:

Profile-wise, a Gen4 Standard Ion Air Knife takes up less than half the space of a Gen4 Super Ion Air Knife.
  • Compressed air consumption: if this were an application for a continuous 36″ wide ionized air curtain in a fast moving product application with a high static charge, we’d have talked about the difference in consumption, at a high pressure (like 80psig) for the two different Ion Air Knives:
    • 36″ Super Ion Air Knife: 104.4 SCFM, or 12,528,000 standard cubic feet per year*
    • 36″ Standard Ion Air Knife: 123 SCFM, or 15,350,400 standard cubic feet per year*

*Eight hours a day, five days a week, 52 weeks a year. Assuming a compressed air cost of $0.25 per 1,000 standard cubic feet, that’s an operating cost difference of:

(15,350,400 – 12,528,000) SCF X $0.25/1,000 SCF = $705.60 per year.

  • In this case, though, it’s a 6″ Ion Air Knife, blowing a short puff of ionized air a few times a minute, at about 5psig supply pressure…anything more would blow those small mylar pieces all over the place:
    • 6″ Super Ion Air Knife: 1.85 SCFM, or 23,088 standard cubic feet per year*
    • 6″ Standard Ion Air Knife: 1.5 SCFM, or 18,720 standard cubic feet per year*

*Three 2-second cycles per minute, eight hours a day, five days a week, 52 weeks a year. Assuming a compressed air cost of $0.25 per 1,000 standard cubic feet, that’s an operating cost difference of:

(23,088 – 18,720) SCF X $0.25/1,000 SCF = $1.09 per year.

  • Sound level: again, this would be a prime consideration if they were operating at higher supply pressures. But, at the lower pressure necessitated by this application, the Standard Ion Air Knife’s 66dBA, a second or two at a time, is hardly noticeable.
  • Price: The purchase price (2021 pricing) of the Standard Ion Air Knife was ~17% less than the Super Ion Air Knife. Normally, we’ll talk about the operating cost…but not when the difference (see above) is just over a buck a year.
  • Air flow pattern: Since a curtain of ionized air was a good fit for this application, an Ion Air Knife (Super or Standard) was the logical choice. If a more concentrated flow was called for, we’d have used an Ion Air Cannon or Ion Air Jet. If they were looking for something handheld, a Gen4 Ion Air Gun or Intellistat Ion Air Gun would have been offered. For static dissipation on the entire circumference or perimeter of a part, we’d have talked about a Super Ion Air Wipe. The size & shape of the air flow, in fact, is frequently where we “start the negotiations” on product selection…sort of analogous to starting with the outside border pieces of a jigsaw puzzle!

EXAIR Corporation has a broad range of Static Eliminators, that are just one part of our diverse offering of Intelligent Compressed Air Products. If you’ve got questions, we’ve got answers…give me a call.

Russ Bowman, CCASS

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

Jigsaw Puzzle (detail) photo courtesy of James Petts Creative Commons License

Clean Room Static Elimination

Class 5 Cleanroom Rating

EXAIRs’ GEN 4 Intellistat Ion Air Gun has earned a Class 5 Cleanroom Rating making it ideal for static elimination in cleanrooms for sensitive processes. There are manufacturing processes that require certain cleanliness standards for operation in such as scientific research, solar panel manufacturing or biotechnology industries. This means that any tool or material you use in this process has to meet a certain standard. EXAIR’s Intellistat was engineered to do just that.

The Intellistat Ion Air Gun is a patented handheld air gun for static elimination in sterile environments and clean rooms. This lightweight tool provides rapid static decay with a simple squeeze of a short-throw trigger reducing 5,000 volts to 500 in under second. Furthering the Intellistat’s utility, it has now been awarded the ISO 14644-1 Class 5 rating for clean rooms and controlled environments making it the perfect tool for electronics manufacturing, testing facilities and laboratories.

The Intellistat is the ideal solution for static elimination in your sensitive processes. Learn more about the Intellistat as well as the rest of EXAIR’s large line of static elimination products at www.EXAIR.com or by contacting any of our Application Engineers.

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

3 Types of Static – How Static is Generated

Static, everyone loathes it except for those kids that like to run around shocking their friends. This phenomenon affects not only everyday life with things like frizzy hair and that annoying zap you get when someone touches you but also industry. But what is static and how is it generated?

Static is generated on the atomic level from the exchange of valance electrons on each surface. The energy produced from the friction causes those valance electrons to enter an excited state; when in this excited state they begin to jump back and forth from atom to atom. When this happens, the atoms begin to accumulate either a positive charge if the atom lost electrons or a negative charge if the atom gained electrons.

As the charge accumulates on the surface where the friction occurs if a ground source (i.e., a piece of metal or a person) comes in close proximity to the charged surface an arc is generated between the two surfaces transferring the build-up of electrons and returning the charged surfaces to a neutral state.

But how can these surfaces become charged in the first place?

The most common and well-known way is via friction. Friction generation is when two surfaces rub against each other causing the static to build up on the surfaces. The energy from the two objects being pushed together and rubbing up against each other causes the electrons within the atoms to enter an excited state. When these electrons are in this excited state the valence electrons will jump from atom to another atom; this causes one atom to become positively charged (lost the electron) and the other to become negatively charged (gained the electron). The harder the two surfaces are pushed together and the faster they are rubbed together the more static will be generated.

A second type of static generation is contact static build up, which is when a charge that is built up when two surfaces impact each other and then separate. Much like friction static generation, contact static build up generates the charge on the surfaces from the kinetic energy of the impact. The material of the two objects in question will determine how many electrons are transferred from surface to surface based on the properties of the atoms in the material (Electronegativity, Ionization Energy, and Electron Affinity).

Contact Static Generation

The third type of static generation is detachment static build up. Detachment static build up once again relies on the kinetic energy and the properties of the atoms in the material. When the two surfaces are pulled apart the electrons that are transferring from one molecule to another get stuck with the molecules of one surface, which leaves both surfaces charged. This is seen a lot with plastic protective covers like the ones that come on a new window pane.

Static generation via detachment

No matter how the static is generated EXAIR’s line of Static Eliminators including EXAIR’s New Intellistat that can neutralize a 1000V charge in under one second. Don’t let static cause issues for your production facility, contact EXAIR for a solution. 

Static Eliminators

If you have any questions about compressed air systems or want more information on any of EXAIR’s products, give us a call, we have a team of Application Engineers ready to answer your questions and recommend a solution for your applications.

Cody Biehle
Application Engineer
EXAIR Corporation
Visit us on the Web
Follow me on Twitter
Like us on Facebook

Eliminate Static from Many Applications Using Super Ion Air Knives

By combining an Ionizing Bar with a Super Air Knife, the Super Ion Air Knife provides rapid static elimination AND blow off of any dust, chips, or debris that was being held to a surface by static electricity.  The laminar curtain of ionized air not only maximizes the rate of static removal, but is also ideal for stripping/sweeping away any debris which leaves a clean, static-free surface.  No more jamming, tearing, nuisance shocks to operators, dust attraction, or any of the many problems associated with static electricity.

The ionized air flow can be precisely regulated to whatever level it takes to get the job done.  At 100psig, the powerful, high velocity blast will dissipate 5,000 volts of static charge in 0.18 seconds!  If the material is fragile, or if that kind of air flow might disrupt the process, it’s not a big deal…even at 5psig supply pressure, that same 5,000 volts is dissipated in 0.40 seconds.  That’s how it works on the plastic roll above – with just a whisper of ionized air flow from a Super Ion Air Knife, they consistently reduce the resultant static charge to less than 400 volts…far below the threshold for the nuisance shocks they wanted to avoid.

Gen4 Super Ion Air Knife Performance

They’re on the shelf in lengths from 3 inches to 9 feet long, and we can make custom lengths in three days after receipt of an order.  The 115/230VAC Power Supplies are available with 2 or 4 outlets, to energize from 1 to 4 EXAIR GEN4 Static Eliminators.

Versatile. Efficient. Effective. Quiet. Safe.  And, readily available.  If you’d like to discuss a static problem, give us a call.

Jordan Shouse
Application Engineer

Send me an email
Find us on the Web 
Like us on Facebook
Twitter: @EXAIR_JS