NITROGEN 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 atlasdrillpress at dewpoints to -58[degrees]F from compressed air. They use proprietary membrane-separation technology to divide air into two 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.

The atlasdrillpress operation of the feed system is controlled by the patented Vermeer AutoFeed II system, which is designed atlasdrillpress to monitor and regulate feed rates automatically. The system monitors engine rpm and regulates the amount of hydraulic oil flow to the feed roller motor, based on the engine speed. "It''s an engine-load sensing device," said Brent Bartels, project engineer at Vermeer. atlasdrillpress "AS wood is fed into the cutting mechanism, that slows the cutter disc down, which loads the engine down so the engine speed is slowing down. If that were to continue, the engine would eventually stall.

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