| 摘要 |
A vapor recovery nozzle has a dual passage hose connector, a fluid control body connected to the connector, a fluid turbine body connected to the fluid control body, and a fluid venturi body mounted within the fluid turbine body, a barrier flange and a vapor impeller housing surrounding a fluid and vapor conduit spout and connected to the barrier flange and fluid turbine body. A fluid turbine and a vapor impeller are mounted on opposite sides of the barrier flange on bearings which are supported on an axle extended from the venturi body. Magnetic couplings drive the vapor impeller with the fluid turbine. Fluid vapor is actively withdrawn from the tank and is moved under a positive discharge pressure through the vapor channel and in the nozzle guard, past a check valve in the vapor channel and through the vapor passage in the hose. Fluid is controlled by a popper valve which is closed in the direction of fluid flow by a spring. An inner plunger opens a valve when the inner plunger is connected to an outer plunger by needle rollers. The outer plunger is moved by a cam connected to the fluid lever. Fluid flows inward through tangential openings in a turbine chamber, and then flows through a venturi and check valve. A radial opening near the check valve produces a reduced pressure, which is raised by vapor drawn through a sensor opening near a distal end of the nozzle. The opening is closed by liquid.
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