TM 55-1930-209-14&P-3
1-8 Component description. The ROWPU system main components are described below. Main components are shown
in Figure NO TAG. Valves, controls, and indicators are discussed in paragraph 3-1.
1-8.1 Pretreatment skid assembly. The pretreatment skid assembly controls water flow and monitors water processing
from the seawater pumps through various cleaning procedures before water Is delivered to the high pressure (HP)
pumps. This assembly consists of a control station, two chemical metering pumps for adding coagulant and Inhibitor, four
water pressure gauges, a cartridge filter assembly, interconnecting piping, and valves. Seawater pumps, part of the
seawater system, establish the required flow rate through the pretreatment skid, the cartridge filter assembly, and the
media filters.
The control station contains electrical circuitry for operating one seawater pump and two chemical metering pump
motors. It also mounts the seawater pump OFF/ON/START switch, OFF/ON switch for each chemical metering pump,
BACKWASH TIMER, and POWER ON, CARTRIDGE FILTER OK, and MEDIA FILTER OK indicator lights
1-2
