FIELD: machine building.
SUBSTANCE: group of inventions relates to pipeline fittings, and is intended to seal valves with ball lock installed in the pipeline. The valve contains a sealing assembly, having the top installed cover, this ensures the sealing assembly installation and dismounting without valve dismounting from the pipeline. The sealing assembly includes O-ring (44) located in valve cavity, and moved by ball element of the valve. The seal casing (46) is located between the O-ring and valve body (12). The seal casing is secured with possibility of disassemblage to the valve body by some bolts (48) arranged in the valve cavity. Between the O-ring ands seal casing the primary leak channel (50) is arranged. Between the seal casing and valve body the secondary leak channel (52) is made. The bellows seal (54) prevents the fluid flow via the primary leak channel. The additional seal (56) prevents the fluid flow via the secondary leak channel. There is method of sealing bushing assembly installation.
EFFECT: group of inventions is aimed at improvement of the valve operation reliability.
19 cl, 4 dwg
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