Metal liquid valve

The utility model discloses a metal liquid valve which comprises a melting furnace and a holding furnace. The utility model is characterized in that the bottom part of the melting furnace and the bottom part of the holding furnace are respectively provided with an outlet and an inlet; a conveying pipe is arranged between the outlet and the inlet, thereby, an inner chamber of the melting furnace is communicated with an inner chamber of the holding furnace; a condenser is arranged on the conveying pipe; the condenser is communicated with a circulating cooling medium source; the condenser is provided with two sections, and the two sections of the condenser are respectively arranged on both ends of the conveying pipe; an induction coil is wound in the middle of the conveying pipe; the induction coil is formed by winding a metal conducting wire pipe, both ends of the induction coil are respectively connected with two electrodes of a power supply with controlled power and an inner chamber of the induction coil is also communicated with the circulating cooling medium source. When metal liquid in the melting furnace is sent in the holding furnace by the utility model, the phenomenon of air absorption and cinder inclusion is avoided to ensure casting workpiece to have the advantages of good quality and high yield and the utility model is suitable for the pipes which are used for conveying the metal liquid to open or to close in the casting trade.