FIELD: valves.
SUBSTANCE: invention relates to a ball valve for shutting off a fluid, in particular to a ball valve having a seat with a soft sealing gasket and sealing edges. The purpose of the claimed invention is to preserve the function of the seat of the valve with a double piston effect (DPE) using seals that are not installed close to each other. The advantage is the presence of two seals installed in the outlet seat, with the same diameter for working on the same surface. The main difference of the proposed valve is the presence of a "group of seats", consisting of the first outlet seat (220), the intermediate element (320) and the second outlet seat (420), made in a simple and economical way.
EFFECT: invention is aimed at keeping the body diameter for the specified group of seats as constant as possible in order to reduce processing operations.
10 cl, 7 dwg
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