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Compressed air-powered vacuums (also known as pneumatic vacuums) work on the venturi principle. Compressed air, via the compressed air supply hose, enters the venturi box and travels through the injector nozzle. As the air continues through the surrounding venturi, it accelerates, thereby creating low pressure inside the venturi box. This low pressure induces vacuum flow inside the adjacent canister, and in turn through the attached vacuum hose.
Compressed air-powered vacuums offer a number of significant advantages over electric vacuums. These include:
Vacuum Flow is the volume of air that passes through a vacuum hose during a given period of time. Vacuum flow is expressed in cubic feet per minute (cfm). With any given diameter vacuum hose, the higher the vacuum flow, the higher the air velocity traveling through that vacuum hose, and the more effective the vacuum unit will be at sucking up and transporting debris.
Vacuum Lift is the height that a vacuum unit can raise a given material or liquid. Vacuum lift (sometimes referred to as vacuum head) is expressed in inches of mercury (in Hg), or inches of water (in H2O). Thus, a vacuum with a rating of 120 inches of water can suck up water from a tank buried 120 inches (10 feet) underground.
Vacuum suction is a non-scientific term referring to the general cleaning power of a vacuum unit. Vacuum suction is an off-hand way to describe a vacuum unit's ability to generate vacuum flow, vacuum lift, and its overall effectiveness to clean.
Pressure is the measure of potential energy stored within compressed air. Pressure is measured in pounds per square inch (psi). The higher the pressure, the more energy is stored, and the more work can be performed. In general, most industrial compressed air systems operate at pressures between 80 and 120 psi. The electrical equivalent of pressure is voltage.
Flow is the volume of air traveling through an air supply line, or through a vacuum hose, during a given period of time. Flow is measured in cubic feet per minute (cfm). The electrical equivalent of flow is amperage.
Both electric and compressed air-powered vacuums have the potential to generate static electricity. Static electricity is generated by the movement of air over the internal surface of a vacuum hose. The amount generated is a function of the composition and humidity of the air, air velocity, vacuum hose material, and material being vacuumed.
A good rule of thumb states that air compressors generate approximately 4 cubic feet per minute (cfm) of compressed air per horsepower (HP) on a continuous basis. For example, a 50 HP air compressor will generate approximately 200 cfm (4 x 50) on a continuous basis. Refer to the specifications on your air compressor for more information. For a given injector nozzle set, the table below shows the minimum size air compressor required (when run continuously) to supply compressed air to the vacuum.
PowerQUAD' vacuums can be configured to maximize compressed air savings, maximize vacuum performance, or a balance between the two. PowerQUAD' vacuums come with three (3) sets of injector nozzles, all of which provide industry leading vacuum efficiency (vacuum performance per cfm of compressed air consumed). To maximize compressed air savings, install the lowest flowing injector nozzles (Green) and then test the vacuum. If higher vacuum performance is desired, install the next higher flowing injector nozzles (Blue) and test again. To maximize vacuum performance, install highest flowing injector nozzles (Yellow) and test the vacuum.
If PowerQUAD' vacuum performance is not as expected, the capacity of the compressed air system may not be sufficient. With the vacuum running, check the pressure gauge which should read between 80 and 90 psi. If the gauge measures lower than 80 psi, considering installing lower flowing injector nozzles. Since vacuum performance is directly related to compressed air consumption, make sure the air supply hose is delivering adequate compressed air to the vacuum for a given injector nozzle set. Refer to the PowerQUAD' Vacuum Performance Table for compressed air consumption, vacuum performance specifications, and recommended minimum size of the compressed air supply line.
Most in-plant air compressors operate at pressures, or are regulated to between 80-120 psi. PowerQUAD' vacuum are engineered to offer optimal performance at 80-90 psi as read on the pressure gauge located on the rear manifold of the vacuum while the vacuum is running.
PowerQUAD' vacuums require compressed air supply lines that range from 3/8" ID up to 1/2" ID depending upon the injector nozzles that have been installed within the vacuum generating head. Refer to the PowerQUAD' Vacuum Performance Table for recommended compressed air supply line size. To ensure adequate performance, a larger than required air supply line can always be employed, but never a smaller size.
Be sure that fittings and/or connectors do not restrict the air supply flow in any manner. Use fittings that are rated the same size, or larger, for a given air supply line. For optimal operation, use "High Flow" connectors.
Receiver size can also affect the operation of the vacuum. The larger the receiver, the longer the period of time the vacuum can run without calling upon the air compressor to cycle "on" and refill the receiver.
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No. PowerQUAD' vacuum generating heads produce extremely high head. Generating vacuum lift of up to 255 inches of H2O running on 80-90 psi of compressed air, they have been known to implode. Therefore, Guardair recommends that steel drums meet the following necessary wall thickness:
150˚ F
Filters should be inspected regularly. Shake out and clean, or replace, clogged filters. Immediately replace ripped or torn filters. Silencer foam should also be inspected regularly and does not normally need to be replaced unless dust/dirt is getting past the filter. Shake out the foam if covered with dirt/dust and replace if necessary.
In addition to offering Standard filters, Guardair offers HEPA and ULPA filters for PowerQUAD' Vacuums.
By far the most common problem is undersized compressed air supply lines, or restrictions due to undersized fittings and/or connectors. Some combination of these two issues often results in inadequate compressed air being supplied to the vacuum. When the vacuum is operating, the pressure gage should read between 80 and 90 psi. If the pressure is lower, check for compressed air restrictions. If no restrictions are found, consider changing out the injectors. See the CHANGING INJECTOR NOZZLES section of the operating instructions. In addition, other things to look for include low plant compressed air pressure (less than 80 psi), a dirty filter, a clogged vacuum hose, or a leaky vacuum head gasket.
Air Watts are a measure of a vacuum's suction power and is a function of Vacuum Flow (cfm) and Vacuum Lift (inches H2O). The higher the Air Watt rating, the better the vacuum performance. Published Air Watt ratings for PowerQUAD' Pneumatic Vacuums also account for air resistance within filters and vacuum hose to provide an accurate measurement of their actual suction power.
The industrial vacuum cleaner is an indispensable tool for the cleanliness and safety of various industrial working environments. Indeed, it enables the removal of dusty residues or processing waste of different materials and different shapes on floors, machine tools and other surfaces, ensuring a clean and safe environment. There are a variety of models of vacuum cleaners, divided mainly by area of application and type of material being vacuumed. Before purchasing, it is important to understand what items to consider.
Below are 7 most frequently asked questions that we are asked by our customers when purchasing an industrial vacuum cleaner.
Suction performance is one of the most crucial aspects to consider. It is important to evaluate the vacuum cleaner's ability to effectively remove different types of debris, dust, and liquids. Suction performance can be determined by the power of the motor, the quality of the filters, and the overall design of the vacuum cleaner. Ensuring that the vacuum cleaner you choose can handle the type of material you intend to vacuum is critical to ensure efficient and smooth operation.
Motor power is another determining factor in choosing an industrial vacuum cleaner. There are motors with different power ratings, generally expressed in watts or horsepower (HP). A more powerful motor can handle heavier tasks and vacuum heavier materials, but it can also consume more power. It is essential to balance the power of the motor with your specific needs to avoid buying a vacuum cleaner that is oversized or insufficient for the job at hand.
Energy consumption is an important consideration, especially if the vacuum cleaner will be used frequently or for extended periods. A vacuum cleaner with high energy consumption can significantly increase operating expenses. Many modern models are designed to be more energy efficient, offering a good balance between power and consumption. Checking technical specifications and looking for models certified for energy efficiency can help reduce costs in the long run.
The noise level is another factor that should not be underestimated, especially if the vacuum cleaner will be used in noise-sensitive environments, such as laboratories. The noise level of vacuum cleaners is measured in decibels (dB). Opting for a model with a lower noise level can help create a more comfortable and less stressful work environment. Some vacuum cleaners, such as those from iVision Vacuum, are equipped with advanced noise reduction technologies. By studying upper tanks and optimizing internal fluid dynamics, these models are able to significantly reduce the noise produced during suction.
The mobility and maneuverability of the vacuum cleaner are crucial, especially if you have to move the unit frequently from one area to another or if you have to operate in confined spaces. Features such as the weight of the vacuum cleaner, the presence of swivel wheels, the length of the power cord, and the ergonomics of the handles can significantly affect ease of use. A compact vacuum cleaner that is well designed for mobility reduces operator fatigue and increases operational efficiency.
The accessories included with the vacuum cleaner can make a big difference in its versatility and its ability to tackle various tasks. Common accessories include different types of nozzles, extension tubes, extra filters and dust collection bags. Checking which accessories come standard and which can be purchased separately in the premium configuraizon helps to better understand the overall value of the vacuum cleaner and ensure that it is suitable for all the intended applications.
Ease of maintenance and cleaning is an essential aspect of ensuring that the vacuum cleaner operates efficiently over time. A design that provides easy access to filters, collection tank, and other critical parts simplifies routine maintenance. It is also important to consider the availability and cost of replacement parts, such as filters and bags, to avoid maintenance problems in the future. An easy-to-maintain vacuum cleaner helps extend its service life and maintain high performance.
Our iVision experts will guide you through choosing the right industrial vacuum cleaner for your needs. For a detailed overview of all the technical specifications of our industrial vacuum cleaners, please visit our website by clicking here, or by contacting us at [ protected] for a no-obligation consultation.
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