TM 55-1930-209-14&P-19
CHAPTER 3 REVERSE OSMOSIS WATER PURIFICATION UNIT (ROWPU) PMCS
Section I. General ROWPU information
3-1 Introduction. Chapter 3 contains Preventive Maintenance Checks and Services for the Reverse Osmosis Water
Purification Unit used on the Reverse Osmosis Water Purification Barges. Operating and maintenance procedures for
this unit are described in TM 55-1930-209-14&P-3. TM 55-1930-209-14&P-3, Appendix C also contains complete
Preventive Maintenance Checks and Services for the ROWPU System.
3-2 Major components. The ROWPU System consists of two identical units, ROWPU 1 and ROWPU 2. Each unit
includes a pretreatment skid assembly consisting of a control station, two chemical metering pumps, four water pressure
gauges and a cartridge filter. It also includes a steel framework to support these components as well as the necessary
electrical cabling switches, indicators, plus interconnecting piping and valves. Seawater pumps, components of the
seawater system, provide pressure for the ROWPU system. Major components, their functions and their location on the
barge are identified in Table 3-1. Table 3-2 contains a list of ROWPU system valves.
Table 3-1. ROWPU System Components
Component
Quantity
Function
Location
Pretreatment
1 per
Controls flow of sea-
Forward of
skid assembly
ROWPU
water and chemicals
media filters
to media filters and
cartridge filter assembly,
indicates status of pre-
treatment filters.
Seawater pump
1 per
Monitors flow rate of
On pretreatment
flow rate
ROWPU
incoming seawater
skid
indicator F1
Pressure gauge
1 per
Indicates pressure of
On pretreatment skid
P1
ROWPU
media filter inlet water
top panel
(seawater pump discharge)
Pressure gauge
1 per
Indicates pressure of
On pretreatment skid
P2
ROWPU
media filter outlet water
top panel
and cartridge filter assembly
inlet water
Pressure gauge
1 per
Indicates water pressure
On pretreatment skid
P3
ROWPU
at cartridge filter assembly
top panel
outlet
Pressure gauge
1 per
Indicates HP pump
On HP
P4
ROWPU
discharge pressure
pump outlet
Pressure gauge
1 per
Indicates brine discharge
On pretreatment skid
P5
ROWPU
pressure
top panel
Change 1 3-1
