TM 55-1930-209-14&P-2
Table 3-2. Seawater System Valves (continued)
Figure 1-3
Label Identification
Type
Callout
Location
and Valve Function
1/4-in ball valve
SW45
Void 4 port - In sea-
GENERATOR COOLING
(Barges
water 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 valve
SW46
Void 4 port - In
GENERATOR COOLING
(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 valve
SW47
Void 2 port - In
AIR CONDITIONING COOLING PUMP
cooling pump line
TO CHLORINATION UNIT: Allows
discharge
seawater to flow to chlorination unit
from cooling pump and isolates
pump
1/2-in globe valve
SW48
Void 2 port - In
SEAWATER PUMPS TO
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 valve
SW49
Void 4 starboard
GENERATOR COOLING
- In diesel generator
OVERBOARD DISCHARGE:
cooling line on
Allows seawater from
starboard shell
generators to be discharged
directly overboard
3-3.1 Supplying seawater to ROWPU's from seachest (deep water) using seawater pump(s) 1 and/or 2.
NOTE
See Figures 1-3 thru 1-1 for seawater valve locations.
3-3.1.1 Normal procedures
a.
Perform before operation checks in paragraph 4-3.
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.
3-10
