Servo valve

Details Servo valve Servo valve

A - Human Necessities

61

M

128/127, 204/127

A61M 27/00 (2006.01)

Patent

CA 1080080

ABSTRACT OF THE DISCLOSURE She servo valve disclosed herein is rendered essentially insenitive to changes in pressure across the valving element by providing spring biasing of the valving element which is controlled by a diaphragm exposed to the inlet and outlet pressures. In a particular embodiment, the diaphragm is spring biased and the spring rates for the diaphragm and the valve element are selected in such proportion that the change in biasing force on the valve element exactly compensates for any change in inlet pressure Therefore, the valve remains closed for any inlet pressure, unless the bias on the spring rates is unbalanced by a signal coming from a sensor.

291735

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