Steam-metering method and apparatus

Details Steam-metering method and apparatus Steam-metering method and apparatus

G - Physics

05

D

341/38.5

G05D 7/06 (2006.01) G01F 13/00 (2006.01)

Patent

CA 1239682

STEAM-METERING METHOD AND APPARATUS ABSTRACT OF THE DISCLOSURE A steam or the like supply system has two parallel legs of supply, a first leg designed for high-demand flows and for the metering thereof, and a second leg designed for low-demand flows and for the metering thereof. Each of these legs has its own cotrol valve, and an electronic controller responds to a sensed drop in demand to control a program of valve in the low-demand line; similarly, the controller responds to a sensed increase in demand to control a program of valve shut down in the low-demand leg while opening the control valve in the high-demand line. Protective features in the controller assure against response to transient changes in demand and against interruption of a valve-changing operation until the programmed change has been fully implemented.

488548

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