The self-contained breathing apparatus
PORTABLE EMERGENCY PUMPS
(SCBA) is a piece of fire-fighter's equipment
The P-100 portable pump is a diesel engine-driven
that provides air from a tank carried on your
back that allows you to enter spaces in much
centrifugal pump assembly, used aboard ship for fire
the same manner as an OBA.
fighting and dewatering (fig. 5-29). When used for fire
fighting, the P-100 pump draws water from the sea and
pumps the water through hoses to supply the firemain
or individual fire hoses. When used for dewatering, the
The primary purpose of the SAR/SCBA is to
P-100 takes suction on a flooded compartment and
support gas-free testing and inspections.
discharges it into the sea. The P-100 is designed to
provide 100 gpm at 83 psi with a suction lift of 20 feet.
Other configurations may be rigged to create a greater
suction lift; these are discussed in NSTM, chapter 555,
The emergency air supply of the SAR/SCBA
volume 1 (series).
is stored in two lightweight cylinders in a
The P-100 pump is a single-suction, one-stage
harness and carry pouch.
centrifugal pump. The suction and discharge
connections have male threads, which are 3 inches and
2 1/2 inches, respectively. The suction hose is a
3-inch-hard rubber hose and may be fitted with a foot
valve assembly. The foot valve consists of a flapper
valve (to keep the engine primed) and a strainer to keep
large foreign matter out of the pump.
Learning Objective: To recall general information
Two examples of fire-fighting hookups are shown
a b o u t va r i o u s t y p e s o f e m e rg e n cy d ewa t e r i n g
in figures 5-30 and 5-31. A dewatering configuration is
shown in figure 5-32. (Shown on the following pages.)
equipment located aboard ship.
VALVE AND HEAD
Figure 5-29. P-100 portable diesel engine-driven centrifugal pump.