NVE Challenger Series tri-lobe blower package

NVE Challenger Series tri-lobe blower package
NVE Challenger Series tri-lobe blower package

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The 4307 Challenger Series tri-lobe blower package from National Vacuum Equipment Inc. is designed to offer liquid-waste haulers a cost-effective way to utilize blower technology.

“We essentially shrunk down and lightened up an existing product to make it easier for contractors to step up into blower technology,” says Ken Hall, general manager of NVE.

The package includes a 535 cfm blower that can generate 26 to 27 inches Hg of continuous vacuum power, depending on working conditions. Other features include stainless steel intake and ballast air silencers; 3/8-inch steel mounting brackets protected by powder-coated paint; factory-connected elbows, fittings and high-temperature hoses; and a diesel flush kit.

The unit can be specified for a new vehicle or retrofitted on most vacuum trucks currently equipped with a 500 cfm, rotary vane pump. It can be powered by either gearbox, hydraulic or belt drive configurations. The gearbox-drive package weighs 840 pounds and is 45.69 inches wide, 29.83 inches high and 36.83 inches deep; the hydraulic-drive package weighs 814 pounds and measures 45.69 inches wide by 29.83 inches high and 31.64 inches deep; and the belt-drive package weighs 1,132 pounds and measures 52.23 inches wide, 60.52 inches high and 36.98 inches deep.

The ability to provide continuous duty at high vacuum power is a key benefit. A ballast-air cooling system, which injects cooler ambient air into the exhaust side, keeps the blower from overheating while maintaining full vacuum power. In addition, the blower does not expel oil, which is a growing concern for many eco-minded customers, Hall says.

Hall also notes that a corrosion-resistant epoxy that coats the blower interior extends its life cycle.

Because the blower has no internal touching parts, it needs to spin faster than a rotary vane pump to create vacuum. The 4307 requires between 2,800 and 4,000 rpms, which can be achieved by using the 1:2 gearbox included with NVE packages and increasing the PTO output percentage. This can also be done with a belt-and-pulley or hydraulic-drive system, he says.

800/253-5500; www.natvac.com.



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