The HVAC VN Series is a system that utilizes nitrogen for purging oxygen in a/c and refrigeration line sets to eliminate oxide deposits during the brazing process. According to the manufacturer, if oxide deposits are created during brazing by not utilizing nitrogen purging, flakes may dislodge once the unit is operational and become trapped in the metering orifice leading to premature compressor failure. Should this occur, many manufacturers might not honor a warranty if the compressor failure is a result of an improper brazing procedure, says the company. The purger consists of a state-of-the-art regulator with an integrated cylinder valve and a lightweight aluminum cylinder. It features an ergonomic, built-in carrying handle with a high-impact protective shroud to eliminate exposed gauges that frequently leak and are easily broken. The system is available with a 22- or 44-cubic foot aluminum cylinder.

Western Enterprises, 875 Bassett Rd., Westlake, OH 44145; 800-783-7890; 440-835-8263 (fax);

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