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.................................................. -- Suction Conditions
drained by gravity. When the pump restarts, it recirculates that same
liquid through the priming chamber until all the air has been passed
through and normal pumping is reestablished.
4.8.1 Self-priming pump layout
"-I
f
Figure 4.11: Self-priming pump system diagram
This standard arrangement will usually locate a foot vane at the bottom
end of the suction line to prevent the liquid draining back into the
sump. Unfortunately, the simple design of these foot valves renders
them susceptible to sticking in the open position and allowing the pipe
to empty.
~rimin,
Tan]
Figure 4.12: Priming tank pump system
