| 摘要 |
A device for a venting circuit of a liquid tank provided with a canister and a filling tube including a filling head, this device comprising: a) a control chamber that communicates with: the canister via a main orifice and a smaller-flow-area secondary orifice, both terminating in a ventilation line leading to the canister; the interior of the tank via the venting circuit; and the filling head via a pressure-equalizing line; b) a closure member that is: provided with an opening therethrough which brings the venting circuit into communication with the pressure-equalizing line; able to move in the control chamber between an operating position with the main orifice closed off by gravity and the secondary orifice left open, and a filling position with both orifices left open; and shaped to sealingly conform to at least a control chamber part that includes the main orifice.
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