Busch Vacuum Pumps and Systems Dry Vacuum Technology in Heat Treatment Processes 8/3/15 - Vacuum technology is an indispensable part of metal heat treatment. The company Vakuum-Härterei Petter GmbH (VHP) in Quickborn, Germany conducted an evaluation in which an oil lubricated rotary vane vacuum pump was replaced by a Busch COBRA NX screw vacuum pump. After a year of testing, VHP is completely convinced by dry screw vacuum technology, and in the future will invest only in ovens equipped with COBRA NX screw vacuum pumps. The vacuum pump was installed as the forepump of a three-stage system to supply a heat treatment oven, and the objective of the evaluation was to find an efficient alternative to the vacuum generators previously used. The fundamental role of vacuum in heat treatment processe

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