TWO-SHUT-OFF VALVE Russian patent published in 2022 - IPC F16K1/44 F16K1/54 F16K39/02 

FIELD: valve industry.

SUBSTANCE: invention relates to valve building and can be used to ensure the safe operation of a steam generating plant as a locking device. The two-shut-off valve contains a body with inlet and outlet channels, main and additional locking elements located on the side of the inlet channel, interacting with sealing seats and connected to the outer and inner stems located on the side of the outlet channel, sealed by stuffing boxes and controlled by independent drives. The valve is additionally provided with a removable part, consisting of a cover and a cylindrical insert with sealing seats made on the outer end surface of the lower end of the cylindrical insert and interacting with the locking elements, and the cover installed with the possibility of being pressed against the body, and the connection of the cylindrical insert with the body is sealed by a sealing element, and a passage channel is made in the shell of the cylindrical insert. By placing shut-off devices on the side of the inlet channel, repair and restoration work is ensured by replacing the removable part of the valve without labor-intensive repair work.

EFFECT: invention provides a double overlap of the flow section.

8 cl, 2 dwg