Spx Corporation

Val DiEullis

Douglas J Tanner

Lawrence R Lafler

Vernon M Cottles

A rotary control valve includes a flow control element having a lower valve shaft rotatably received in a non-magnetic body portion. A magnet is coupled with a lower valve shaft and rotatable therewith to produce an external magnetic field that varies in accordance with the angular position of the flow control element. A magnetic field detector, positioned in the external magnetic field, is operable to detect the external magnetic field and to produce position signals representative thereof, such being indicative of the angular position of the flow control element.

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Saint Paul, MN, United States of America

Val DiEullis