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 [FIGURE 1-2 OMITTED]When the magnetic bearings are energized, the motor and impellers, which are keyed directly to the magnetic shaft, levitate. Permanent-magnetic bearings do the primary work, while digitally controlled electromagnets provide the fine positioning. Four positioning signals per bearing hold the levitated assembly to a tolerance of 0.00002 in. As the levitated assembly moves from the center point, the electromagnets'' intensity is adjusted to correct the position. These adjustments occur 6 million times a minute. The software has been designed to automatically compensate for any out-of-balance condition in the levitated assembly.SHUTDOWNS AND POWER FAILURESWhen the compressor is not running, the shaft assembly rests on graphite-lined, radially located gaspoweredaircompressors touchdown bearings. The magnetic bearings normally position the rotor in the proper location, preventing contact between the rotor and other metallic surfaces. If the magnetic bearings fail, the touchdown bearings (also known as backup bearings) are used to prevent a compressor failure. NITROGEN gaspoweredaircompressors GENERATORSNitrogen generators use either membrane or pressure-swing-adsorption (PSA) technologies. Membrane generators made by Balston, a division of Parker, produce up to 99.5% pure, commercially sterile nitrogen at dewpoints to -58[degrees]F from compressed air. They use proprietary membrane-separation technology to divide air into two gaspoweredaircompressors streams: one 95 to 99.5% pure nitrogen, the other oxygen-rich with carbon dioxide and other trace gases.Compressed air flows through bundles of individual, hollow fibers made of semipermeable membranes. Each fiber has a perfectly circular cross section and a uniform bore through its center. Because the fibers are so small, a great many can be packed into a limited space, providing enough surface area to produce a relatively high-volume flow of nitrogen. Oxygen, water vapor, and other trace gases permeate the membrane fiber gaspoweredaircompressors and are discharged through a permeate port. Nitrogen stays within the hollow fibers and flows through an outlet port.Balston PSA nitrogen generators produce up to 99.95% gaspoweredaircompressors pure, compressed nitrogen at dewpoints to -40[degrees]F from nearly any compressed-air supply. The generators continually transform gaspoweredaircompressors air into nitrogen at safe, regulated pressures without operator attention.PSA generators use a combination of filtration and PSA technologies to create nitrogen.Compressed air is prefiltered to remove all contaminants down to 0.1 micron. The gas separation process preferentially adsorbs oxygen over nitrogen using carbon-molecular sieve (CMS). At high pressures, the CMS has a greater affinity for oxygen, carbon dioxide, and water vapor than it does at low pressures. By raising and lowering pressure within the CMS bed, all contaminants are captured and released, leaving the CMS unchanged. This process lets nitrogen pass through. Depressurizing the CMS releases adsorbed oxygen and other contaminant gases to the atmosphere. Buy a gas air compressor with us and save a TON of cash. Our selection of cheap gas air compressors is second to none.
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