Figure 4-9.-FFG-7 start air system (simplified).
primary means of starting the GTMs during a
FFG-7 CLASS SHIPS. The last start air system
we will discuss is the one installed on the FFG-7
pressure is reduced to a workable pressure by the
HP/LP air reducing valve, which alleviates the need
for further pressure reduction. This design is very
similar to the one used on the CG-47 class ships.
there are three methods or sources of air for starting
the GTMs: (1) HP air, (2) LP (bleed) air from the start
The second method is using LP (bleed) air from
bleed piping from the online GTM. You can use any of
the three methods, depending on the circumstances.
In most cases, HP air will be available and will be the