Dual-metal-sheet steam drain valve

A double-metal sheet vapor drain valve relates to a valve. The utility model provides a double-metal sheet vapor drain valve which has the advantages of excellent seal performance, small abrasion and long service life and is provided with a valve body, a valve cover, a valve seat, a valve core, the double metal sheets, a guide pin and a support plate. The valve body is fixedly connected with the valve cover; the valve seat is arranged in an inner cavity formed by the valve body and the valve cover; the valve seat is fixedly connected with the valve body; an inner hole is arranged in the valve seat; the upper end of the valve seat is provided with the guide pin; the valve core is arranged in the inner hole of the valve seat; the shape of the lower end of the valve core is a reversed spherical surface which is sealed with the spherical surface at the valve opening of the valve seat; the double metal sheets are connected with the valve core and matched with the guide pin in a sliding way; the support plate is ar