Page 26 - AFVi CNG & LNG Participant Guide

Module 2: High-Pressure CNG Fuel System Components

High-Pressure  Removes liquid or aerosol
Coalescing Filter o Oil or water
 Remove particulates from gas
 CAUTION: The high-pressure coalescing filter is ALWAYS
under high pressure.
 Follow manufacturer’s procedures for maintenance

High-Pressure  High-pressure gauge displays pressure in the
Gauge and high-pressure fuel system
Transducer

 Transducer communicates
pressure to fuel control module
and fuel gauge

Pressure Regulator  Both high and low pressure are in one device
 Reduces high pressure to engine operating pressure
 Most use engine coolant to heat
 Freeze-up causes driveability issues

NGV Essentials and Safety Practices (CNG & LNG) © 2024 AFVi All Rights Reserved Page 2-8