Shutoff valve for mechanically sealed orvr system

Details Shutoff valve for mechanically sealed orvr system Shutoff valve for mechanically sealed orvr system

B - Operations, Transporting

60

K

B60K 15/035 (2006.01) F02M 33/08 (2006.01)

Patent

CA 2542404

A vapor vent/tipping valve has a diaphragm with a bleed therethrough responsive to the differential pressure of bleed flow to control vapor venting to the canister and vapor recirculation to the filler tube. A dip tube causes rising fuel in the tank to close the dip tube and prevent vapor flow to the diaphragm bleed thereby starving the recirculation line and allowing nozzle discharge to create a vacuum in the filler and effect nozzle shutoff. Alternatively, float operated shutoff valves may be employed in the dip tube and vapor vent chamber inlet. The shutoff valves may include inertial members for closing the float valves to afford tipping/rollover protection.

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