DRAIN VALVE Russian patent published in 2022 - IPC B64D37/32 F16K17/168 

FIELD: aircraft fuel systems.

SUBSTANCE: invention relates to aircraft fuel systems. The drain valve consists of a hollow cylindrical body (1), a spring-loaded poppet valve. A bushing (4) is installed in the lower part of the body (1). In the upper part of the body (1) there is a cylindrical protrusion (8) with a through hole in which the upper part of the rod (2) is installed with a gap forming an annular through passage (9). The lower part of the stem (2) is installed in the sleeve (4). The upper part of the plate has a clamping surface, on which an annular cylindrical bore is made, in which an annular sealing element is installed. An annular sharp edge (11) is made on the inner part of the body (1) of the drain valve on the side of the pressing surface of the plate, with the possibility of its interaction with the annular sealing element. A spring is installed between the lower part of the plate and the bushing (4). A through hole (13) is made in the wall of the cylindrical protrusion (8) of the valve body (1) perpendicular to its axis, and a through hole (14) is made coaxially to it in the upper part of the stem (2).

EFFECT: simplification of the design of the drainage valve is achieved.

2 cl, 1 dwg