Shaw Development’s nonpressurized refueling systems allow fuel tanks to be filled at up to 150 gal/min (568 L/min). Based on aerospace technology, the system does not pressurize the reservoir and can be used safely on metal, composite, or bladder tanks. It includes three main components: the receiver, which connects with industry-standard nozzles; inlet shutoff valve, which actuates the shutoff of the system; and the level control vent assembly, which determines the proper shutoff level. The mechanical shutoff actuation cannot be overridden, disallowing the tank to be overfilled or split. Configurations are offered for most vehicles: weld-on for metal tanks, bolt-on for composite tanks, and top-mounted plate assemblies. Ground-level refueling decreases hazardous footing dangers, while high-flow transfer rates minimize downtime. The tank cannot be ruptured, and dry break connections minimize contamination.