An aspirator for creating vacuum comprising: a housing defining a fluid passageway therethrough, the fluid passageway comprising: a first tapering portion gradually tapering from a larger internal opening to a smaller internal opening ; and a second tapering portion gradually tapering from a larger internal opening to a smaller internal opening ; wherein the first tapering portion and the second tapering portion converge toward one another with their smaller internal openings facing one another; a gate positioned between and in fluid communication with the first tapering portion and the second tapering portion of the housing, the gate having a first Venturi tube with a Venturi opening in fluid communication with a suction port and a second Venturi tube with a Venturi opening in fluid communication with the suction port , wherein the first Venturi tube creates a vacuum when fluid flows therethrough, wherein the second Venturi tube creates a vacuum when fluid flows therethrough; and an actuator coupled to the gate , the actuator operable to move the gate to place the first Venturi tube or the second Venturi tube , as selected, into alignment with the smaller internal openings of the first and second tapering portions ; characterized in that the gate comprises a first gate member and a second gate member with a biasing member disposed therebetween to bias the first gate member and second gate member away from one another and into engagement with a gate housing portion of the housing enclosing the gate . a housing defining a fluid passageway therethrough, the fluid passageway comprising: a first tapering portion gradually tapering from a larger internal opening to a smaller internal opening ; and a second tapering portion gradually tapering from a larger internal opening to a smaller internal opening ; wherein the first tapering portion and the second tapering portion converge toward one another with their smaller internal openings facing one another; a first tapering portion gradually tapering from a larger internal opening to a smaller internal opening ; and a second tapering portion gradually tapering from a larger internal opening to a smaller internal opening ; wherein the first tapering portion and the second tapering portion converge toward one another with their smaller internal openings facing one another; a gate positioned between and in fluid communication with the first tapering portion and the second tapering portion of the housing, the gate having a first Venturi tube with a Venturi opening in fluid communication with a suction port and a second Venturi tube with a Venturi opening in fluid communication with the suction port , wherein the first Venturi tube creates a vacuum when fluid flows therethrough, wherein the second Venturi tube creates a vacuum when fluid flows therethrough; and an actuator coupled to the gate , the actuator operable to move the gate to place the first Venturi tube or the second Venturi tube , as selected, into alignment with the smaller internal openings of the first and second tapering portions ; characterized in that the gate comprises a first gate member and a second gate member with a biasing member disposed therebetween to bias the first gate member and second gate member away from one another and into engagement with a gate housing portion of the housing enclosing the gate . <EOS>