Perkins M190C, Installation Manual

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Chapter 7 N40475
Page 22
In some cases it is necessary to have a number of
fuel tanks in order to achieve the required operating
range. In such cases, where possible, one tank should
be regarded as the main tank for each engine and the
other tanks should be arranged so that they will drain
into the main tank by gravity. If a gravity system is not
possible, then the system shown in Figure 3 should
be used.
Figure 3 shows a collector tank (1), fed by all the
storage tanks and connected to the engine feed (2)
and return systems (3), but with a vent pipe (4) taken
to any convenient tank.
There is no doubt however, that a simple fuel system
as illustrated in Figure 1 should be used wherever
possible, as having a completely separate tank and
supply to each engine guarantees that if an engine
stops, due to running out of fuel or to water or foreign
matter in the fuel, the other engine will not be affected
simultaneously.This will give some time for appropriate
manoeuvring action to be taken. The simple system
will also require the minimum number of valves and
fittings, which ensures maximum reliability in service.
Figure 3