TM 55-1930-209-14&P-1
Table 11-5. Seawater System Valves (continued)
Figure
Label Identification
Type
Callout*
Location
and Valve Function
1/4-in ball
SW45
Void 4 port - In
GENERATOR COOLING
valve
(Barges
seawater supply line
STRAINER PRESSURE IN:
2 and 3
between seachest and
Allows pressure reading
only)
strainer
on supply side of cooling water
strainer
1/4-in ball
SW46
Void 4 port - In
GENERATOR COOLING
valve
(Barges
seawater cooling line
STRAINER PRESSURE OUT:
2 and 3
on discharge side of
Allows pressure reading on
only)
strainer
discharge side of strainer
1-in gate
SW47
Void 2 port - In
AIR CONDITIONING COOLING PUMP
valve
cooling pump line
TO CHLORINATION UNIT: Allows
discharge
seawater to flow to chlorination unit
from cooling pump and isolates
pump
1/2-in globe
SW48
Void 2 port - In
SEAWATER PUMPS TO
valve
seawater supply line
CHLORINATION UNIT:
between seawater pumps
Allows seawater from
and chlorination unit
seawater pumps to enter
pressure regulator
chlorination and air
conditioning system
3-in gate
SW49
Void 4 starboard - In
GENERATOR COOLING
valve
diesel generator
OVERBOARD DISCHARGE:
cooling line on
Allows seawater from
starboard shell
generators to be discharged
directly overboard
* See Figures 11-1, 11-3, and 11-5.
11-12.1 Supplying seawater to ROWPU's from seachest (deep water) using seawater pump(s) 1 and/or 2
NOTE
See Figures 11-1, 11-3, and 11-5 for seawater valve locations.
11-12.1.1 Normal Procedures
a.
Perform before operation in paragraph 11-11.
b.
If seawater is to be supplied to chlorination unit when cooling pump is not being operated, set seawater pressure
regulator to 10 psi and open seawater valve SW48 in void 2 port. To supply cooling water to air conditioner, open
seawater valves SW47 and SW28 (Barges 2 and 3 only).
c.
Close seawater valves SW4 thru SW8, SW11 thru SW13, SW18, SW19, SW22, SW23, SW26, SW27, and SW29.
Open seawater valves SW30 thru SW34.
d.
Open or close seawater valves as follows:
o = open
x = closed
- = not affected
Seawater (SW) valve no:
Supplying seawater to:
1
2
3
9
10
16
17
20
21
24
25
Both ROWPU units
o
o
-
o
o
o
o
o
o
o
o
ROWPU1 only
o
x
-
o
-
o
-
o
-
o
x
ROWPU 2 only
x
o
-
-
o
-
o
-
o
x
o
11-21