The invention discloses a Y-shaped exhaust gear and relates to a
steam system. The invention provides the Y-shaped exhaust gear which is reasonable in structure, stable in performance and longer in service life. The Y-shaped exhaust gear is provided with an upper cover, a lower cover, an upper diaphragm
capsule cover, a lower diaphragm
capsule cover, a spring, a limiting plate, a diaphragm, a locating plate, a spherical valve core, a reinforcing ring and a
valve seat, wherein the limiting plate is arranged in an
alcove at the inner side of the upper diaphragm
capsule cover; the spherical valve core is connected with the locating plate; the spherical valve core is connected with the locating plate and the diaphragm; the reinforcing ring is pressed on the outer end face of the lower diaphragm capsule cover; the diaphragm, the locating plate and the spherical valve core are arranged in an outer
alcove of the upper diaphragm capsule cover; filling liquid is injected into the inner cavities of the diaphragm and the upper diaphragm capsule cover and is sealed; the lower diaphragm capsule cover is connected with the upper diaphragm capsule cover; the
valve seat is arranged in a lower cover hole; the spring is sheathed into an inner cavity of the upper cover; and the other end of the spring is pressed on a convex plate of the upper diaphragm capsule cover. The Y-shaped exhaust gear is reasonable and advanced in structure, small in size, good in performance and long in service life.