Vacuum furnace users are striving to increase productivity and reduce operating costs. Higher

performance and reduced maintenance is now the target. Through use of dry compressing

vacuum pumps, this target can now be achieved.

The presentation will introduce the modern design of a dry-compression vacuum pump with

cantilevered screw rotors and highlight advantages for use in demanding heat-treatment

applications such as Brazing, Carburizing and Sintering.

Although there are obvious environmental benefits - no contaminated waste oils and emissions,

spent filters and related disposal - the main driver for using dry-compressing vacuum pumps is

that harsh heat-treatments involve dealing with condensable vapors, binders, fluxing agents and

even cracked residues such as soot and tar. In contrast, when entering an oil-sealed vacuum

pump, those items create the need for frequent and costly oil changes, filters and replacements of

internal shaft-seals. The productive time of the furnace is reduced by the necessary time for

service and maintenance and the risks of unplanned down-time are increased.

Suitable dry-compression vacuum pumps can now reduce maintenance to a simple cleaning

without the need for costly spare parts. Use of a modern monitoring system can detect status of

critical pump parameters in real-time, thereby, allowing the user to schedule maintenance and