BUILT-IN VALVE Russian patent published in 2019 - IPC F16K15/14 F16K27/00 

FIELD: construction.

SUBSTANCE: invention relates to domestic drainage fittings. Built-in valve consists of housing, which includes assembly of two sections, including inlet section and outlet section, wherein inlet section and outlet section are made with possibility of engagement between them. Inlet section forms inlet of valve body, and outlet section forms outlet of valve body, at that inlet of valve body and outlet of valve body have common longitudinal axis. Inlet section forms a chamber having a larger cross-sectional area than that of valve body outlet. Built-in valve comprises duckbill valve and support having inlet and outlet, wherein duckbill valve and support are inserted into chamber through outlet end of inlet section. Insert has inlet and outlet, wherein insert is configured to be inserted into chamber and with possibility of accommodating duckbill valve, wherein the insert forms a flow path between the valve housing inlet and the valve body outlet so that the first side and the second opposite side of the insert direct the flow path to an equal or narrower size than the valve body outlet.

EFFECT: technical result is solving the clogging problem.

9 cl, 6 dwg