Line Vac – Air Operated Conveyors

Convey parts, materials, and waste – with no moving parts!

The Line Vac is a fast, low cost way to convey pellets, scrap trim, textiles, bulk solids, food products, chips, and much more.  Simply connect to a standard hose, tube, or pipe and a powerful in-line conveyor is created.

Available in (4) materials – aluminum, 303 and 316 stainless steels, and a special hardened alloy, and (3) end connection types – NPT threaded, smooth bore, and the new sanitary flanged. Sizes range from 3/8″ up to a 6″. It is certain that an available Line Vac option will meet your process criteria.

For lighter materials and short conveyance distances, the Light Duty model is ideal, and for the most abrasive and heaviest materials over longer distances, the Heavy Duty style is available.

The Line Vacs offer many safety benefits, including eliminating the dangers of lifting heavy sacks and climbing ladders to fill hoppers, and with the 316 stainless steel sanitary flanged Line Vacs, food materials are kept enclosed and and separated and provides ease of cleaning.

Check out the video by clicking the photo below

Capture

The Line Vac works by having a small amount of compressed air injected through directed nozzles to produce a vacuum on one end and high output air flow on the other, with instantaneous response.  By using a pressure regulator, available as part of a kit or separately, the flow of the material transfer can be easily controlled. No moving parts or electricity assures maintenance free operation!

lvmatrix
Trim Scrap Removal

Conveyance rates are determined by the material bulk density, typical particle size, total distance of conveyance, including vertical rise, and the targeted transfer rate.  An EXAIR Application Engineer can assist you, and with the above information, recommend the right size and type of Line Vac to meet the desired results.

All catalog models are in stock and we ship same day with an order received by 3 pm EDT in the US and 2 pm EDT for orders shipping to Canada.

Our team of engineers can design a special Line Vac to meet many applications special requirements, from special materials such as PVC and PVDF to special end connections such as pipe flanges and barbed hose connections.  Let us know the special requirements of your process and we’ll design a solution.

Special Flanged LV
This special 3/4″ Line Vac was designed to evacuate fumes from a silicone wafer etching operation

To go with the Line Vac, we can provide a reinforced, heavy wall, clear PVC conveyance hose in lengths up to 50′.  Additionally, the Line Vac Drum Cover is a fine mesh, non-woven cover built to fit on the top of a 30 or 55 gallon drum.  It is designed to contain the material to the drum and allow the air from the Line Vac to escape.

6850drumcover
Drum Cover, for 30 and 55 Gallon Drums

If you have questions regarding the Line Vac, or would like to talk about any EXAIR Intelligent Compressed Air® Product, feel free to contact EXAIR and myself or one of our Application Engineers can help you determine the best solution.

Brian Bergmann
Application Engineer

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Heavy Duty Line Vac for Blasting Media Recovery

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Many times we will get the call from customers who are in the media blasting industry. Media blasting is used in many cases to clean or strip debris, residue, paint or other contamination from the surface of a variety of parts. This cleaning process is generally used to prepare a surface to receive further preparations or perhaps even a coat of primer or paint.

The media blasting process works very well. The only downside is that once the media is spent through the nozzle, it bounces off the part and lands on the ground or any other horizontal surface in the blasting room. So, clean-up after a session of blasting can become a real headache for the operators. Generally, they will want to recover the media for re-use as it can be quite expensive to purchase.

That’s where EXAIR comes in with our Heavy Duty Line Vac product. The Heavy Duty Line Vac has exceptionally high suction capability to move even the densest of blasting media back up into the supply hopper so it can be run through the system over and over. The highly abrasion resistant material of the Heavy Duty Line Vac has been tested with aggressive media such as ground glass and ground garnet and has a proven record of tolerance for moving such material without excessive wear. Other materials of construction like aluminum, stainless steel or hard anodized coatings will wear and degrade – the hardened alloy of the Heavy Duty Line Vac is the best choice for abrasive materials. 

Normally, customers in this industry will opt for the 1-1/2” or 2” model of our Heavy Duty Line Vac for their post blasting clean-up processes. It really takes a task that is true drudgery and turns it into a simple task. It takes the pain away for sure.

If you are in the blasting industry and have similar issues, we invite you to contact us and ask about the Heavy Duty Line Vac range of products. You will be glad you did.

Neal Raker, Application Engineer
nealraker@exair.com

 

With so Many Vacuum Generator Choices, Which Do I Choose?

SAL                 HDLV                    E-vac

This is a very real question that we receive often from our customers. And that is why we have a full staff of Application Engineers, to answer just such a question. It is true that EXAIR has quite a variety of product that actually generates a “vacuum flow” of air. We have Air Amplifiers, Light Duty Line Vac, Line Vac, Heavy Duty Line Vac, Adjustable E-vac as well as Modular and In-Line E-vac products.  And that doesn’t even include our choices within the Industrial Housekeeping product group.

Back to the question at hand, how do I narrow my choices for which vacuum generator to use? The manner in which we approach such a question has to do with the application itself. We view the available range of product as a spectrum of choices from high volume, low vacuum (Air Amplifiers) air movers to low volume, high vacuum (In-Line E-vacs) air mover choices.

How do we navigate the choices?  It depends on the needs of the application. Allow me to give a few quick examples to give you an idea.

Example 1: The customer has a large air bag used in the trucking industry which is placed along-side a payload in order to reduce shifting during travel. The requirements of this application are that the bag be inflated and deflated in a reasonable time. The air pressure needed within the bag is considered quite low. So, in this case, we would gravitate toward using something along the lines of our Air Amplifier or Light Duty Line Vac which are more suited for this range of air moving applications where just air or perhaps light smoke or fumes may need to be transported.

Example 2: The customer has a shot blasting operation in which they need to collect the blast media back up into a central container for re-use or perhaps for recycling. In this scenario, the media itself actually needs to be moved and it is a rather dense, metal shot that needs a high velocity airflow to get it up and moving from point A to point B. Our Heavy Duty Line Vac is the perfect candidate for this kind of need as it delivers a good combination of high vacuum and high volume air movement to achieve goals of this nature.

Example 3: The customer has a reaction chamber in which they need to achieve -9” Hg (Mercury) vacuum in reasonably short time frame. Our Adjustable E-vacs work well to provide both high vacuum (even higher than HD Line Vac) and reasonably high (although lower than HD Line Vac) volume of vacuum flow. So, for applications where you have a large container on which a vacuum needs to be drawn or perhaps you have a large vacuum cup that is working with material that is considered very porous, these are the kinds of applications for which you would look at Adjustable E-vac.

Example 4: The customer has a set of 6 suction cups that are being used on a frame to pick-up a piece of window glass for placement into a window frame. With glass being a non-porous material, the customer only needs enough airflow to evacuate the area of the suction cup and hold on to the material tightly. This is the kind of application for which our In-Line E-vac would come in very handy to produce the low flow, high vacuum flow.

Where does your application fall within this spectrum of uses?  You aren’t sure?  Then contact our Application Engineering Department and speak with an Engineer today. We are glad to discuss with you and bring clarity to your application need.

Neal Raker, Application Engineer
nealraker@exair.com

Heavy Duty Line Vac Recycles Spent Abrasive Blast Media

I have run into another very good use of the Heavy Duty Line Vac and wanted to share this with you. A customer had contacted me from overseas. His interest was to apply Heavy Duty Line Vac to his abrasive media blast cabinets. The cabinets have a hopper filled with media that feeds a spray gun which accelerates the media toward a target work piece to remove anything from paint, to oxidation, oil and any other stubborn stains that might persist. That hopper is filled with Aluminum Oxide powder which is very abrasive and thus very good at the task of abrasive blasting.

150125

The problem was in determining how best to replenish the hopper without having to stop and shovel the media back up to the feed hopper. In comes the EXAIR Heavy Duty Line Vac model 150125. The Heavy Duty Line Vac was fitted to a pipe which is connected to the tapered bottom of the media blasting cabinet. As the media falls down into the bottom, the Line Vac creates a powerful suction which conveys the Aluminum Oxide powder back up to the hopper for re-use.

The key to success for this application is the construction of the Heavy Duty Line Vac. These models are constructed from a hardened alloy material. This material  makes for our most abrasion resistant model series available. Applications like this one where a stainless steel Line Vac might last 3 months, a Heavy Duty model can last 18 to 24 months or more of constant usage. Results will vary depending on application factors but there is no doubt that the Heavy Duty Line Vac is a highly reliable and effective tool to have for abrasive media conveying.

Neal Raker, Application Engineer
nealraker@exair.com

EXAIR Heavy Duty Line Vac Re-Loads Rainfall Sander

In the world of lost wax casting a wax pattern is created and then fused to a wax runner system along with multiples of other patterns or perhaps the same pattern. Once the “tree” of wax patterns is created, the tree is coated with a fine material to reproduce fine details in the pattern and is then “stuccoed” with a coarse, ceramic material. It is this application of the coarse ceramic material process with which my most recent customer needed help. It was not so much the application of the ceramic material to the wax pattern but the refilling of the rainfall sander which is the tool that actually applies the ceramic to the patterns. Below is a photo of a rainfall sander for your reference.

As you can see a fine, water fall-like flow of sand dropping down from above provides the means for the “stuccoing” process.

rain fall sanderHDLV

The problem is that the hoppers for these machines can be in excess of 7 feet above the floor and require replenishing. The idea is to put just the right amount of material into the hopper without over-filling which has been a problem in the past with the customer dumping by hand over-head.

The solution the customer was looking for was the 1-1/2” Heavy Duty Line Vac to be used in a moveable cart-based hopper filling tool with a gallows-type over arm which can be placed above the hopper of each machine to provide the metered filling.

The reasons for picking the Heavy Duty version of the EXAIR Line Vac was for its robust resistance to abrasion from high speed materials moving through the throat area. Heavy Duty Line Vac is made of a high grade, tool steel with a proprietary surface treatment to harden the material even further to make the unit highly resistant to abrasion. The Heavy Duty Line Vac has been used with such materials as silica sand, ground glass and ground garnet for hopper replenishment in abrasive blasting applications, so it could handle the stucco material quite nicely. The higher conveying capacity of the Heavy Duty Line Vac also made quick work of the material being conveyed to make for unobtrusive service.

Neal Raker, EXAIR
nealraker@exair.com