DC water-pump controllable valve with low reflux speed

The utility model discloses a uniflow water pump control valve with slow back-flow velocity. The valve body is provided with an inlet which is provided with an inlet valve seat and an outlet valve seat and an outlet. The inlet valve seat and the inlet valve flap form the first stage of sealing, an outlet valve seat is positioned between the cone-shaped cover and the valve inner sheath, the outlet valve seat and the outlet valve flap form the second stage of sealing. The utility model is characterized in that: a cone-shaped axle is provided between the outlet valve flap and the inlet valve flap and is connected with the bolt through nut. The utility model has the advantages of rational structure and original design. The outlet valve flap and the inlet valve close simultaneously. During the process of closing, the outlet valve flap and the inlet valve form twice decompression all the time to reduce the flow velocity of the whole process. The utility model can protect the water pump effectively and is with high populating value.