A device for producing vacuum using the Venturi effect comprising: a housing defining a suction chamber , a motive passageway converging toward the suction chamber and in fluid communication therewith, a discharge passageway diverging away from the suction chamber and in fluid communication therewith, and a suction passageway in fluid communication with the suction chamber ; and a solenoid valve in the suction passageway controlling fluid flow into the suction chamber , the solenoid valve comprising an elongate sealing member received inside a coil , a first seal seat having a first bore therethrough defining a closed position of the solenoid valve; a first core member defining a second bore aligned with the first bore and through which the elongate sealing member is translatable into engagement with the first seal seat and defining a plurality of flow channels radiating radially outward from the second bore ; and a second seal seat defining an open position at the opposite end of the coil from the first seal seat ; wherein the elongate sealing member is translatable within the coil between the first seal seat and the second seal seat wherein the elongate sealing member and the first core member both comprise materials that conduct magnetic flux; wherein, in the open position, fluid flow is through the first bore , through the plurality of flow channels in the first core member , and around the exterior surface of the elongate sealing member ; wherein within the suction chamber a motive exit of the motive passageway is generally aligned with and spaced apart from a discharge entrance of the discharge passageway by a lineal distance (V D ) to define a Venturi gap . a housing defining a suction chamber , a motive passageway converging toward the suction chamber and in fluid communication therewith, a discharge passageway diverging away from the suction chamber and in fluid communication therewith, and a suction passageway in fluid communication with the suction chamber ; and a solenoid valve in the suction passageway controlling fluid flow into the suction chamber , the solenoid valve comprising an elongate sealing member received inside a coil , a first seal seat having a first bore therethrough defining a closed position of the solenoid valve; a first core member defining a second bore aligned with the first bore and through which the elongate sealing member is translatable into engagement with the first seal seat and defining a plurality of flow channels radiating radially outward from the second bore ; and a second seal seat defining an open position at the opposite end of the coil from the first seal seat ; wherein the elongate sealing member is translatable within the coil between the first seal seat and the second seal seat wherein the elongate sealing member and the first core member both comprise materials that conduct magnetic flux; wherein, in the open position, fluid flow is through the first bore , through the plurality of flow channels in the first core member , and around the exterior surface of the elongate sealing member ; wherein within the suction chamber a motive exit of the motive passageway is generally aligned with and spaced apart from a discharge entrance of the discharge passageway by a lineal distance (V D ) to define a Venturi gap . <EOS>