The model E & PE are engine heated two-stage regulator/vaporizers. The model E provides a choice of
two negative outlet pressures. A blue secondary spring to provide a -1.5” w.c. (0.37 kPa) output and an optional
orange secondary spring, provides -0.5” w.c. (0.12 kPa) output. A manual primer is standard on the
The model PE provides a positive outlet pressure for applications that require a positive feed system and/or
the ability to vaporize liquid fuel. A heated regulator/vaporizer is not required of CNG (it is recommended that
the Model PEV be used for these systems). Additional mixture stability is possible with the PE as a result of a
more consistent fuel temperature gained through the use of the heated labyrinth. The PE is supplied as a fixed
outlet pressure regulator but can be converted to an adjustable unit with the AC1-74 retrofit kit.