TWO-STOP VALVE Russian patent published in 2020 - IPC F16K11/10 

FIELD: valve industry.

SUBSTANCE: double-locking valve is intended for pipeline valves operating in power plants characterized by complex operating conditions, high reliability requirements and maximum restrictions of mass and dimension characteristics, for example, in nuclear power plants for transport purposes, as a localizing shutoff element on steam pipelines of the second circuit. Technical result is achieved due to that main gate is equipped with unloading mechanism, arranged between main gate and external stem and consisting of inner sealing seat of main gate and sealing band on thrust head of outer rod, and support element, fixed in main bumper and enclosing inner rod, at that, O-rod thrust head has slots. In support element there are through input holes. In the main element there are output through holes on the side of glands. At that, inner opening of additional gate communicates with inner cavity of outlet branch pipe.

EFFECT: improving valve reliability with two gates and reducing drive dimensions.

3 cl, 3 dwg