INPUT CONTROL FOR SYMMETRIC INPUT Russian patent published in 2018 - IPC G05D16/02 G05D16/06 G05D16/10 F16K17/24 

FIELD: machine engineering.

SUBSTANCE: fluid flow control device comprises a control valve having a valve body, which defines an inlet and outlet openings, and a valve channel located between the inlet and outlet openings. The housing assembly is adjacent the valve channel and the annular housing assembly has a first opening configured to receive a valve disc. A balancing diaphragm is attached to the valve disc portion and the body portion assembly, and a portion of the balancing cavity is defined by the upper surface of the balancing diaphragm and the inner surface of the body assembly. A measuring channel passes from the inlet opening of the control valve to the balancing cavity so that the inlet opening of the control valve is in fluid communication with the balancing cavity. The measuring channel has a first end located at the inlet of the valve channel and a second end adjacent to the balancing cavity.

EFFECT: improved stability of the fluid flow control device by providing constant pressure acting on the balancing diaphragm.

19 cl, 6 dwg