Variable Frequency Drives for a Vacuum Pump System

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First published in Pumps and Systems Magazine, January 1998Variable FrequencyDrives for a Vacuum Pump SystemBy Kevin Skelton, Graham Corporation_____________________________ ________________________________________ _________________Editor s Note: Responding to requests fromreaders many of whom work with vacuumpumping systems Pumps and Systems isintroducing this new column with theJanuary issue. Look for it periodically. In many process plant applications, usinga Variable Frequency drive (VFD) tocontrol the capacity of a liquid ringvacuum pump (LRVP) is an System designs consisted ofsizing the LRVP to operate efficiently for acertain portion of the process cycle andthen using a recycle control valve systemto maintain the desired LRVP suctionpressure.

First published in Pumps and Systems Magazine, January 1998 Variable Frequency Drives for a Vacuum Pump System By Kevin Skelton, Graham Corporation

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