VALVE Russian patent published in 2016 - IPC F16K17/34 

FIELD: valves production.

SUBSTANCE: present invention relates to normally open valves and is intended to shut off the flow of a working medium from one line to another. Valve comprises a body with inlet and outlet pipes and hamber with a crossover plug. There is a boss with a bore in the body. There is a jet with tapering and widening cavities on the inlet side of the body. There are two grooves along the axis of the input of the body. There is a spring-loaded stepped plug with a piston in the case grooves. Case has channels that connect the input cavity til the jet nozzle and the above-piston cavity of the stepped plug with the piston valve via the boss groove. There is a boss with stepped grooves perpendicular to the axis of the jet nozzle, the stepped grooves have a spring-loaded throttling rod with a piston. Outer surfaces of said piston interacts with the inner surfaces of the boss stepped grooves. There is a channel connecting the inlet cavity of the valve with the above-piston cavity of the throttling rod with a piston on the side of the inlet valve.

EFFECT: invention is designed to simplify the valve design and reduce its weight due to the use of the working medium pressure to drive the valve without sending an electric control command to the valve drive.

5 cl, 3 dwg