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Adjustable E-Vac® Vacuum Generators

A simple turn can increase or decrease vacuum and flow!

Compressed air use is minimised by selecting the exact vacuum level required to lift the heavy, porous cardboard cartons.

What is the Adjustable E-Vac?

EXAIR’s Adjustable E-Vac is a series of low cost, compressed air powered vacuum generators where the vacuum and flow rates can be easily adjusted to suit the application requirements. These vacuum pumps are ideal for a wide variety of pick and place, box opening, clamping, lifting, chucking and surface mounting applications. They are maintenance free and have no moving parts to wear out.

Engineered for high efficiency, the Adjustable E-Vac minimises compressed air use by allowing it to be tuned to the application. With a simple turn of the unit, the vacuum and flow levels can be changed to overcome porosity and increase or decrease the lifting power. The straight-through, single stage aluminium construction requires no vacuum filter and simply passes contaminants from dirty environments through the unit so there is no clogging or loss of suction.

Adjustable E-Vacs are available in 4 sizes that have adjustable vacuum rates up to 25″ Hg (85 kPa) and flow rates up to 81 SCFM (2,294 SLPM). Kit configurations that include vacuum cups, fittings, tubing and a mounting clip are available.

How the Adjustable E-Vac Vacuum Generator works

Compressed air flows through the inlet (1), then through an adjustable annular nozzle (2). As the airstream enters the vacuum flow, it expands and increases in velocity (3). A vacuum flow is induced, creating suction (4). The air flow that is drawn through the vacuum inlet mixes with the primary airstream, then exhausts on the opposite end (5).

Watch the video

 

Increased Energy & Vacuum Efficiency

Energy and vacuum efficiency are not limited to the Adjustable E-Vac vacuum generators. All E-Vac styles and models can offer significant improvements when looking to reduce the amount of compressed air used for a specific vacuum application. Once the appropriate amount of vacuum and flow for the application are determined, it is important to select the appropriate model that will deliver the best performance while using the least amount of compressed air that it takes to do the job.

Many companies have a centralised vacuum system where the vacuum is generated at a location that is far away from the point of use. The long runs of piping through the plant produce line loss and it is often difficult to obtain that perfect balance of vacuum and flow required for the application. The compact In-Line E-Vac vacuum generators eliminate this problem since they can be mounted at the point where the vacuum source is needed. CAA’s team can help you to select the E-Vac vacuum generator and vacuum cups that provide the right amount of lifting capability while minimising the amount of compressed air usage.

Performance

The amount of vacuum created varies with the porosity of the load being picked up. Units come from the factory set to 15″ Hg (51 kPa). A maximum of 25″ Hg (85 kPa) can be achieved on a solid, non-porous surface, but will require increasing the air consumption and vacuum flow.

Adjustable E-Vac Vacuum Generator Performance (15″ Hg/51 kPa)
Model Air Consumption Sound Level in dBA Vacuum Flow (SCFM/SLPM) vs. Vacuum Level (“Hg/kPa) (Set to 15” Hg/51 kPa)
SCFM @ 80 PSIG SLPM @ 5.5 BAR No Muffler Straight Through Muffler 0 3/10 6/20 9/31 12/41 15/51
840008 8.2 232.2 89 77 5.80 164.2 4.68 132.6 3.71 105.0 2.59 73.4 1.53 43.2 0.00 0.0
840015 15.4 436.1 95 77 18.70 529.5 16.00 453.1 12.02 340.3 7.75 219.4 4.05 114.7 0.00 0.0
840030 26.4 747.5 99 74 36.70 1039.2 32.00 906.1 25.63 725.8 17.68 500.5 7.69 217.8 0.00 0.0
840060 62.7 1775.4 107 85 81.00 2293.6 67.00 1897.2 56.33 1595.1 29.00 821.2 11.13 315.3 0.00 0.0

 

Adjustable E-Vac Vacuum Generator Performance (25″ Hg/85 kPa)
Model Air Consumption Sound Level in dBA Vacuum Flow (SCFM/SLPM) vs. Vacuum Level (“Hg/kPa) (Set to 25” Hg/85 kPa)
SCFM @ 80 PSIG SLPM @ 5.5 BAR No Muffler Straight Through Muffler 0 3/10 6/20 9/31 12/41 15/51 18/61 21/71 24/81 25/85
840008 12.2 345.5 104 89 5.80 164.2 5.58 157.9 5.18 146.5 4.80 135.9 4.33 122.5 3.83 108.3 2.94 83.2 1.93 54.5 0.37 10.5 0.00 0.0
840015 25.9 733.4 107 89 18.00 509.7 16.53 467.9 15.70 444.6 14.18 401.4 12.13 343.3 8.98 254.1 5.65 160.0 2.69 76.1 0.55 15.6 0.00 0.0
840030 44.8 1268.6 107 82 32.00 906.1 29.00 821.2 26.83 759.8 24.12 682.9 20.92 592.3 14.63 414.1 9.90 280.3 6.13 173.7 1.19 33.8 0.00 0.0
840060 105.2 2978.8 114 92 70.00 1982.1 66.33 1878.3 62.33 1765.0 55.50 1571.5 45.00 1274.2 30.67 868.4 18.37 520.1 8.38 237.4 2.10 59.5 0.00 0.0

 

Set The Vacuum and Flow To The Application Requirements

This series of Adjustable E-Vac vacuum generators permits easy adjustment by simply loosening the locknut and turning the exhaust to increase or decrease the level of vacuum and vacuum flow. This style is also an excellent choice where large particulate may be present and passed through the vacuum system. There are 4 models with adjustable vacuum up to 25” Hg (85 kPa) and vacuum flow up to 81 SCFM (2,294 SLPM).
Choose the Adjustable E-Vac by the SCFM (SLPM) flow that best suits the performance needed for your application.

Adjustable E-Vac Kits give you the ability to experiment with an assortment of vacuum cups. E-Vac kits include a muffler, an assortment of (4) pairs of vacuum cups (closely matched to the performance of that E-Vac), (2) straight, (2) elbow and (1) tee vacuum fitting, 3, (10′) of vacuum tubing and a mounting clip.

Adjustable E-Vac Deluxe Kits include the same items as the standard kit with the addition of an automatic drain filter separator for the compressed air supply and pressure regulator (with coupler).

Adjustable E-Vac Vacuum Generators have vacuum levels up to 25″ Hg (85 kPa) that can be used with porous and non-porous materials.

 

Applications

  • Pick and place of parts and equipment
  • Bag/package opening
  • Label placement
  • Vacuum forming
  • Mould evacuation
  • Vacuum filling
  • Leak testing
  • Evacuate containers
  • Clamping and chucking
  • Paper alignment and feed in printing equipment
  • Vacuum packaging
  • Surface mounting
  • Vacuum press for wood veneers and laminates
  • Carton forming
  • Robotic tooling
  • Vacuum liquids for testing

Advantages

  • Compact, portable
  • Single stage design eliminates fluctuations in vacuum
  • Quiet
  • 18 Models
  • Instantaneous vacuum
  • Easy to mount at point of use
  • Lightweight, rugged
  • No moving parts – no maintenance
  • Fast response – increases cycle time
  • Durable 6061 aluminium construction
  • Safe operation – no electricity

Other Applications For E-Vac

E-Vacs are used in many other “non-lifting” applications. They are commonly used for vessel evacuation, clamping, chucking, and other work holding applications. Many types of automated equipment use vacuum to evacuate, grip, hold, align and insert parts. These vacuums can be used for surface mounting, vacuum packaging, bag opening, label placement, carton forming and container evacuation.

Another popular application is using the E-Vac for liquid sampling. This process can easily be accomplished using an E-Vac vacuum generator attached to a liquid holding tube. When the tube is dipped into a vat, tank or container, the compressed air is turned on so it draws a specific volume of liquid up into the tube. When the compressed air is turned off, the liquid flows from the tube and can be dispensed into a container or machine to be analysed.

Dimensions

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Adjustable Vacuum Generator Dimensions
Model Air Inlet A Vacuum Inlet B   C D E F G H L M Exhaust Port J Exhaust Port K
840008 1/8 NPT 1/4 NPT in N/A 2.00 4.38 1.19 0.72 N/A 0.63 1.31 1/4 NPT N/A
mm N/A 51 111 30 18 N/A 16 33
840008M 1/8 NPT 1/4 NPT in 6.63 2.00 4.38 1.19 0.72 0.75 0.63 1.31 1/4 NPT 1/4 NPS
mm 168 51 111 30 18 19 16 33
840015 3/8 NPT 1/2 NPT in N/A 2.38 5.44 1.31 0.97 N/A 0.63 1.56 1/2 NPT N/A
mm N/A 60 138 33 25 N/A 16 40
840015M 3/8 NPT 1/2 NPT in 9.69 2.38 5.44 1.31 0.97 1.25 0.63 1.56 1/2 NPT 1/2 NPS
mm 246 60 138 33 25 32 16 40
840030 3/8 NPT 1/2 NPT in N/A 2.50 6.19 1.44 1.22 N/A 0.75 1.94 3/4 NPT N/A
mm N/A 64 157 37 31 N/A 19 49
840030M 3/8 NPT 1/2 NPT in 13.63 2.50 6.19 1.44 1.22 2.00 0.75 1.94 3/4 NPT 3/4 NPS
mm 346 64 157 37 31 51 19 49
840060 1/2 NPT 3/4 NPT in N/A 2.75 6.50 1.56 1.47 N/A 0.75 2.19 1 NPT N/A
mm N/A 70 165 40 37 N/A 19 56
840060M 1/2 NPT 3/4 NPT in 13.94 2.75 6.50 1.56 1.47 2.00 0.75 2.19 1 NPT 1 NPS
mm 354 70 165 40 37 51 19 56

Models

Adjustable E-Vac Model Model Model Model
8.2 SCFM 15.4 SCFM 26.4 SCFM 62.7 SCFM
232 SLPM 436 SLPM 748 SLPM 1,775 SLPM
Adjustable E-Vac Only 840008 840015 840030 840060
Adjustable E-Vac with Straight Through Muffler 840008M 840015M 840030M 840060M
Adjustable E-Vac Kit with Straight Through Muffler 841008M 841015M 841030M 841060M
Adjustable E-Vac Deluxe Kit with Straight Through Muffler 842008M 842015M 842030M 842060M

How to Build An E-Vac System

1. Select the E-Vac type.

A. Determine if the part to be lifted is porous or non-porous.
B. Select a style – In-Line Low VacuumIn-Line High Vacuum, or Adjustable. The E-Vac type determines maximum vacuum available for lifting the part and vacuum cup selection.

Porous low vacuum generators max. vacuum = 21″ Hg (71 kPa)
Non-porous high vacuum generators max. vacuum = 27″ Hg (91 kPa)
Adjustable E-Vac vacuum generators max. vacuum = 25″ Hg (85 kPa)

2. Determine the weight of the part.

3. Multiply the weight by the vacuum cup safety factorfor the total vacuum cup capacity needed. See Choosing A Suitable Vacuum Cup

4. Determine the number of vacuum cups needed by considering the following:
A. How many cups are needed to distribute the weight for stable lifting and placement?
B. What is the weight that each vacuum cup can lift based on maximum vacuum available (E-Vac type)?
C. Select vacuum cups from chart based on maximum vacuum available (E-Vac type) and holding weight per cup.

5. To choose an E-Vac model number, consider the entire vacuum system from the E-Vac to the part.
A. Number of vacuum cups per E-Vac
B. Length and size of vacuum tubing
C. Vacuum cup size and type

  • The volume of air to evacuate from your vacuum system and the vacuum flow of the E-Vac you’ve selected will determine the time it takes from E-Vac activation to vacuum cup holding the part. As the vacuum level in the system increases, the volume of evacuating air decreases.
  • A lower volume of air in the vacuum system and/or a higher capacity (SCFM/SLPM) E-Vac will give faster pick-up times.
  • An exact pick-up time cannot be calculated.
  • If the E-Vac vacuum generator doesn’t meet your needs, return it for a different model.

Here is an example using the steps outlined above:

A sheet of material measures 914mm x 914mm (3′ x 3′) and weighs 11.3kg (25 lbs). Each sheet is in a stack and will be placed on a conveyor.

If it is porous like wood and positioned vertically: If it is non-porous like glass and positioned horizontally:
1. Choose a porous, low vacuum In-Line E-Vac. The maximum vacuum is 21″ Hg (71 kPa). 1. Choose a non-porous, high vacuum In-Line E-Vac. The maximum vacuum is 27″ Hg (91 kPa).
2. The weight is 11.3kg (25 lbs). 2. The weight is 11.3kg (25 lbs).
3. Since the part is picked-up and hung on an overhead conveyor vertically, the safety factor is 4. The vacuum cup capacity needed is 4 x 25 = 100 lbs (45.4kg). 3. Since the part is picked-up and placed on a belt conveyor horizontally, the safety factor is 2. The vacuum cup capacity needed is 2 x 25 = 50 lbs (22.7kg).
4. Four vacuum cups will be used for stability when lifting the sheet. Each cup will need at least a 25 lb. (11.3kg) capacity. At 21″Hg (71 kPa), the Model 900755 Vacuum Cup will hold up to 25.3 lbs (11.5kg). 4. Four vacuum cups will be used for stability when lifting the sheet. Each cup will need at least a 12.5 lb (5.7kg) capacity. At 27″ Hg (91 kPa), the Model 900754 Vacuum Cup will hold up to 20.8 lbs (9.4kg).
5. There are 4 small round vacuum cups that are positioned close to one another. The vacuum system has a small to medium volume and pick-up and release time is not critical. To reduce the sound level, use the straight through muffler. 5. There are 4 small round vacuum cups that are positioned close to one another. The vacuum system has a small to medium volume and pick-up and release time is not critical. To reduce the sound level, use the straight through muffler.
Order: (1) Model 800008M In-Line E-Vac with Straight Through Muffler(4) Model 900755 Vacuum Cups Click here for other accessories. Order: (1) Model 810006M In-Line E-Vac with Straight Through Muffler(4) Model 900754 Vacuum Cups  Click here for other accessories.
NOTE: The Model 840008M Adjustable E-Vac can be substituted for picking up the wood or the glass since the vacuum level and vacuum flow is easily adjusted to suit the porous or non-porous application. The Adjustable E-Vac is especially useful for loads that vary.

Accessories

Vacuum Cups & Accessories Needed to Build Your Vacuum System

EXAIR offers round, oval and bellows style vinyl vacuum cups, which are ideal for general purpose applications. A variety of mufflers, tubing, check valves and fittings are available to make it easy to build a vacuum system best suited to your vacuum application.

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Filters, Regulators, Valves & More

With proper filtration of dirt, moisture and oil from the compressed air supply, EXAIR compressed air products will operate for years with no maintenance required. Use a 5 micron or smaller filter separator on the compressed air supply. To prevent problems associated with oil, use a 0.03 micron or smaller oil removal filter on the compressed air supply. Pressure regulators permit easy selection of the operating pressure, providing infinite control of flow, force and air consumption

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Installation and Maintenance Sheets

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Adjustable E-Vac Vacuum Generators

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E-Vac Vacuum Generators PDF Brochure

CAD Drawings

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