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Selection Criteria The DuroVac Series of industrial vacuums utilize two different types of vacuum producer: the DuroVac "PD" Series and the DuroVac "FS" Series feature "positive displacement" (P.D.) vacuums; the compact DuroVac "C" Series and the mid-size DuroVac "R" Series use regenerative vacuum producers. There is a significant difference in the performance capability between the two types of machines; however, in general terms it can be said that for day-to-day cleaning with relatively short hoses, the regenerative machines are recommended (theyre cheaper and even quieter). For heavy cleaning and spill cleanups, or for supporting long hoses and central piping systems, the PD powered machines are best. Please see the selection chart below for specific performance capabilities. Note that, unlike some vendors, where the chart indicates that a machine will work with three x 25ft long hoses, performance under that criteria will be excellent, not just marginally possible!
Normally, for powders with a density of 35 - 55 pcf., the minimum choice is suitable. For heavier materials, a higher horsepower choice is required. For ultra-fine powders like carbon black, talc, and the oxides, select an air to cloth ratio below 6.5:1. (The systems NOT suitable for this service are marked red above). All these systems make wonderful little central vacuum systems. The "P" Series will support a pipe networks up to 400 ft. long without modification. The regen powered DuroVac systems must be fitted with the optional US$125 relief valve when used with a central system. The PD powered machines (the "P" Series and the "FS" Series) are used for serious, heavy cleanup jobs. The 7.5 Hp machine will pick up approximately 40 pounds of material per minute based on a material density of 80 pcf. The 10 Hp machine will pick up approximately 60 pounds per minute through a 2" hose 50 ft. long, double that rate through a 25 foot long hose! Since the PD systems can move material so quickly, the Large canister versions are usually recommended; as well, various inexpensive options are available to provide external storage up to 2 cubic yards. Please see Vacuum Accessories The best measure of performance is pickup power. The 10 Hp unit
picks up 60 lbs./minute as mentioned. Main competitive units pick up only
30% of this. This is because many of these units use a centrifugal vacuum
pumps. Let's Discuss it!
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Central Vacuums by Industrial Air Solutions
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title: Industrial Vacuum System Selection Chart