Page 62 - CNG/ LNG ESP Participant Guide 2024

Module 8: LNG Vehicle Systems and Safety Practices

Once Tank Pressure
Drops Below 125 psi

▪ Once the pressure drops below approximately 125 psi, the liquid valve opens and
allows LNG to flow through the heat exchanger, which creates vapor to be supplied to
the engine through the overpressure regulator

Fill Connector

With Cover Without Cover

LNG Fuel Storage ▪ Tank within a tank
Tank ▪ Insulated primarily by
vacuum
▪ 230 psi maximum
pressure
▪ Pressure serves as fuel
pump
o
▪ Approximately -220 F
during fill

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