| 摘要 |
An overflow prevention system and method for storage tanks includes a flow disturber situated in the tank fill tube, a fluid level sensor for sensing fluid level in the tank, and an actuator that causes the flow disturber to move toward the fill tube inlet in response to rising fluid level sensed by the fluid level sensor. The flow disturber is arranged to travel between a first position in which it does not cause turbulent flow in the fill tube and a second position in which it causes turbulent flow. The actuator is responsive to the fluid level sensor to move the flow disturber to the second position when a predetermined fluid level is reached. The transition to turbulent flow triggers the automatic shut-off feature of the dispensing nozzle to prevent the tank from being filled beyond the predetermined level.
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