Page 68 - ESP Participant Guide_Neat

Module 8: LNG Vehicle Systems and Safety Practices

Pressure Control ▪ Supplies vaporized LNG to heat exchanger when
(Economizer) Valve excess head pressure exists in tank
▪ Controls flow toward engine
▪ Closes at ~125 psi

Internal Check ▪ Located inside plumbing manifold on tank
Valve ▪ Provides 2 psi back pressure
▪ Assists Pressure Control Regulator in rapidly
reducing tank pressure

Engine Coolant Heat
Exchanger

▪ Uses heat from engine coolant for warming
▪ Warms LNG, changes state from liquid to gas

LNG Over-Pressure ▪ Regulates maximum pressure to engine fuel
Regulator inlet
▪ Typically set at 125 psi
▪ May be externally adjustable

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