Slide valve position indicator

Details Slide valve position indicator Slide valve position indicator

F - Mech Eng,Light,Heat,Weapons

16

K

F16K 37/00 (2006.01) G01D 5/12 (2006.01) G01D 5/14 (2006.01)

Patent

CA 2622067

The angular displacement of an inclined cam about the compressor slide valve shaft rotates an annular surface having a helically inclined face aligned with and spaced apart from a sensor head of a magnetic sensor mounted to the compressor. The rotation provides a linear variation in the size of the gap between the sensor head and the inclined ramp which directly corresponds to the compressor slide valve position between its fully closed and fully open positions. Linear variation in the size of the gap produces a correspondingly linear output signal from the magnetic sensor which provides the input for an analog input card in an associated programmable logic controller to determine the slide value position.

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