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OPERATING THE 225-POUND SERVICE
AIR SYSTEM |
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A. CUTTING IN THE 225-POUND SERVICE AIR FORE AND AFT |
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(Figure 9-1) |
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9A1. Preparation.
1. Supply high-pressure air to the two
225-pound reducers.
2. Open the supply valve to the 225-pound service air manifold at each 225-pound
reducer, so that low-pressure air is being
supplied to the manifold.
3. Shut all the valves on the 225-pound
service air manifold.
9A2. Steps in operation.
1. Remove the locking cap from the forward
service air line valve on the 225-pound
service air manifold in the control room.
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2. Open the forward service air line
valve.
3. Remove the locking cap from the after
service air line valve on the 225-pound service
air manifold in the control room.
4. Open the after service air line valve.
5. Lock open the forward service air line
valve by replacing the locking cap and securing
the padlock.
6. Lock open the after service air line
valve by replacing the locking cap and securing
the padlock.
The 225-pound service air manifold is
now rigged to supply service air fore and aft.
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Figure 9-1. CUTTING THE 225-POUND SERVICE AIR FORE AND AFT.
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B. PUTTING PRESSURE IN THE FORWARD TRIM TANK |
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(Figure 9-2) |
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9B1. Preparation.
1. Rig the 225-pound service air manifold. (See Section 9A.)
2. This results in the following:
a. The forward and after service air line
valves on the 225-pound service air manifold
are locked open.
b. There is 225-pound air in the forward
and after service air lines.
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9B2. Steps in operation.
1. Open the forward trim tank blow valve
on the 225-pound service air manifold in the
control room.
2. Observe the forward trim tank pressure
gage over the manifold, when the required
pressure, is reached.
3. Shut the forward trim tank blow valve
on the manifold.
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Figure 9-2. PUTTING PRESSURE IN THE FORWARD TRIM TANK.
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C. VENTING THE AFTER TRIM TANK OUTBOARD |
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(Figure 9-3) |
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9C1. Steps in operation.
1. Open the after trim tank vent valve
on the after torpedo tube blow and vent manifold
in the after torpedo room.
2. Turn the three-way cock on the starboard
side of the after torpedo room to the
vent outboard position.
3. Open the after torpedo tube outboard
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vent valve, on the starboard side of the after
torpedo room.
The after trim tank is now vented outboard.
4. Shut the after torpedo tube outboard
vent valve upon completion of venting.
5. Shut the after trim tank vent valve on
the after torpedo tube blow and vent manifold.
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Figure 9-3. VENTING THE AFTER TRIM TANK OUTBOARD
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D. BLOWING FROM THE NO. 1 TO THE NO. 2 AUXILIARY
BALLAST TANK |
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(Figure 9-4)
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9D1. Preparation.
1. Rig the 225-pound service air manifold. (See Section 9A.)
2. This results in the following:
a. The forward and after service air line
valves on the 225-pound service air manifold
are locked open.
b. There is 225-pound air in the forward
and after service air lines.
c. The trim system is lined up for this
operation.
9D2. Steps in operation.
1. Open the auxiliary ballast tank No. 1
blow and vent stop valve on the starboard
side of the crew's mess room.
2. Open the auxiliary ballast tank No. 2
blow and vent stop valve on the port side of
the crew's mess room.
3. Open the auxiliary ballast tank No. 2
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vent valve on the 225-pound service air manifold
in the control room.
4. Open the auxiliary ballast, tank No. 1
blow valve on the 225-pound service air manifold.
Observe the pressure gage for the auxiliary
ballast tank No. 1 to be sure that the
required pressure is obtained.
5. Shut the auxiliary ballast tank No. 1
blow valve when the required amount of
water has been transferred.
6. Shut the auxiliary ballast tank No. 2
vent valve on the 225-pound service air manifold.
7. Shut the auxiliary ballast tank No. 2
blow and vent stop valve in the crew's mess
room.
8. Shut the auxiliary ballast tank No. 1
blow and vent stop valve in the crew's mess
room.
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Figure 9-4. BLOWING FROM THE NO. 7 TO THE NO. 2 AUXILIARY BALLAST TANK.
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E. VENTING AUXILIARY BALLAST TANK NO. 1 |
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(Figure 9-5)
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9E1. Steps in operation.
1. Open the auxiliary ballast tank No. 1
blow and vent stop valve on the starboard
side of the crew's mess room.
2. Open the auxiliary ballast tank No. 1
vent valve on the 225-pound service air manifold
in the control room.
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3. Shut the auxiliary ballast tank No. 1
vent valve on the 225-pound service air manifold
when venting is completed.
4. Shut the auxiliary ballast tank No. 1
blow and vent stop valve in the crew's mess
room.
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Figure 9-5. VENTING AUXILIARY BALLAST TANK NO. 1
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F. BLOWING FROM THE FORWARD WRT TANK TO THE FORWARD
TRIM TANK |
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(Figure 9-6) |
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9F1. Preparation.
1. Rig the 225-pound service air manifold. (See Section 9A.)
2. This results in the following:
a. The forward and after service air line
valves on the 225-pound service air manifold
are locked open.
b. There is 225-pound air in the forward
and after service air lines.
Before air pressure can be admitted to the
WRT tank, make certain that the WRT tank
overflow valve is shut. This automatically
opens the quick-acting WRT tank blow valve
(whistle valve) to permit blowing the tank,
as these two valves are interlocked and operated
by the same lever. (See Figure 4-6.)
9F2. Steps in operation.
1. Open the 225-pound air supply valve
to forward torpedo tube blow manifold in the
forward torpedo room.
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2. Open the forward trim tank vent valve
on the forward torpedo tube blow and vent
manifold.
3. Turn the three-way cock, located on
the starboard side forward in the forward
torpedo room, to the vent inboard position.
4. Open the WRT tank blow valve on the
forward torpedo tube blow and vent manifold.
Observe the WRT tank air pressure gage in
order not to exceed the required pressure.
5. Shut the WRT tank blow valve on the
forward torpedo tube blow and vent manifold
when the required amount of water has been
transferred.
6. Shut the forward trim tank vent valve
on the forward torpedo tube blow and vent
manifold.
7. Shut the 225-pound air supply valve
to the forward torpedo tube blow and vent
manifold.
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Figure 9-6. BLOWING FROM THE FORWARD WRT TANK TO THE FORWARD TRIM TANK.
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G. BLOWING FROM THE FORWARD TRIM TANK TO THE
AFTER TRIM TANK |
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(Figure 9-7)
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9G1. Preparation.
1. Rig the 225-pound service air manifold. (See Section 9A.)
2. This results in the following:
a. The forward and after service air line
valves on the 225-pound service air manifold
are locked open.
b. There is 225-pound air in the forward
and after service air lines.
c. The trim system is lined up for this
operation.
9G2. Steps in operation.
1. Open the after trim tank vent valve
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on the 225-pound service air manifold in the
control room.
2. Open the forward trim tank blow
valve on the 225-pound service air manifold.
Observe the forward trim tank pressure gage
so as not to exceed the required pressure.
3. Shut the forward trim tank blow valve
on the 225-pound service air manifold when
the required amount of water has been transferred.
4. Shut the after trim tank vent valve on
the 225-pound service air manifold.
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Figure 9-7. BLOWING FROM THE FORWARD TRIM TANK TO THE AFTER TRIM TANK.
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H. BLOWING FROM THE AUXILIARY BALLAST TANK NO. 2
TO THE FORWARD TRIM TANK |
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(Figure 9-8) |
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9H1. Preparation.
1. Rig the 225-pound service air manifold. (See Section 9A.)
2. This results in the following:
a. The forward and after service air line
valves on the 225-pound service air manifold
are locked open.
b. There is 225-pound air in the forward
and after service air lines.
c. The trim system is lined up for this
operation.
9H2. Steps in operation.
1. Open the forward trim tank vent valve
on the 225-pound service air manifold in the
control room.
2. Open the auxiliary ballast tank No. 2
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blow and vent stop valve, port side of the
crew's mess room.
3. Open the auxiliary ballast tank No. 2
blow valve on the 225-pound service air manifold.
Observe the pressure gage for auxiliary
ballast tank No. 2, in order not to exceed the
required pressure.
4. Shut the auxiliary ballast tank No. 2
blow valve on the 225-pound service air manifold
when the required amount of water has
been transferred.
5. Shut the auxiliary ballast tank No. 2
blow and vent stop valve in the crew's mess
room.
6. Shut the forward trim tank vent valve
on the 225-pound service air manifold.
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Figure 9-8. BLOWING FROM THE AUXILIARY BALLAST TANK NO. 2 TO THE FORWARD TRIM TANK.
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I. BLOWING FROM THE FORWARD WRT TANK TO THE
NO. 2 TORPEDO TUBE |
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(Figure 9-9)
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9I1. Preparation.
1. Rig the 225-pound service air manifold. (See Section 9A.)
2. This results in the following:
a. The forward and after service air line
valves on the 225-pound service air manifold
are locked open.
b. There is 225-pound air in the forward
and after service air lines.
Before air pressure is admitted to the
WRT tank, make certain that the WRT overflow
valve is shut. (See Figure 4-5.) This
automatically opens the quick-acting WRT
tank blow valve (whistle valve) to permit
blowing the tank. These two valves are interlocked
and operated by the same lever.
9I2. Steps in operation.
1. Open the No. 2 torpedo tube vent valve
on the torpedo tube blow and vent manifold
in the forward torpedo room.
2. Turn the three-way cock, located on
the port side of the forward torpedo room, to
the vent inboard position.
3. Open the No. 2 torpedo tube drain
valve on the torpedo tube drain manifold.
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4. Open the torpedo tube drain stop valve
to WRT tank.
5. Open the 225-pound air supply valve
to the forward torpedo tube blow and vent
manifold in the forward torpedo room.
6. Open the WRT tank blow valve on
the torpedo tube blow and vent manifold.
Observe the WRT tank pressure gage in order
not to exceed the required pressure.
(Water is now being transferred to the
No. 2 torpedo tube.)
7. Shut the WRT tank blow valve on the
torpedo tube blow and vent manifold when
the column gage on the torpedo tube shows
that the tube is full.
8. Shut the No. 2 torpedo tube vent valve
on the torpedo tube blow and vent manifold.
9. Shut the No. 2 torpedo tube drain
valve on the torpedo tube drain manifold.
10. Shut the torpedo tube drain stop valve
to the WRT tank.
11. Shut the 225-pound air supply valve
to the forward torpedo tube blow and vent
manifold in the forward torpedo room.
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Figure 9-9. BLOWING FROM THE FORWARD WRT TO THE NO. 2 TORPEDO TUBE.
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J. BLOWING FROM THE NO. 8 TORPEDO TUBE TO THE
AFTER WRT TANK |
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(Figure 9-10)
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9J1. Preparation.
1. Rig the 225-pound service air manifold. (See Section 9A.)
2. This results in the following:
a. The forward and after service air line
valves on the 225-pound service air manifold
are locked open.
b. There is 225-pound air in the forward
and after service air lines.
9J2. Steps in operation.
1. Open the after WRT tank vent valve
on the torpedo tube blow and vent manifold
in the after torpedo room.
2. Turn the three-way cock, on the starboard
side of the torpedo room, to the vent
inboard position.
3. Open the after torpedo tube drain
stop valve to the WRT tank.
4. Open the No. 8 torpedo tube drain
valve on the torpedo tube drain manifold.
5. Open the 225-pound air supply valve
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to the after torpedo tube blow and vent
manifold in the after torpedo room.
6. Open the No. 8 torpedo tube blow
valve on the torpedo tube blow and vent manifold.
Observe the No. 8 torpedo tube pressure
gage in order not to exceed the required pressure.
(Water is now being transferred to the
WRT tank.)
7. Shut the No. 8 torpedo tube blow valve
on the torpedo tube blow and vent manifold
when the column gage on the torpedo tube
shows that the tube is empty.
8. Shut the No. 8 torpedo tube drain
valve on the torpedo tube drain manifold.
9. Shut the after torpedo tube drain stop
valve to the WRT tank.
10. Shut the after WRT tank vent valve
on the torpedo tube blow and vent manifold.
11. Shut the 225-pound air supply valve
to the after torpedo tube blow and vent manifold.
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Figure 9-10. BLOWING FROM THE NO. 8 TORPEDO TUBE TO THE AFTER WRT TANK.
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K. BLOWING FROM THE NO. 6 TORPEDO TUBE TO THE FORWARD
TRIM TANK BY WAY OF THE FORWARD WRT TANK |
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(Figure 9-11)
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9K1. Preparations.
1. Rig the 225-pound service air manifold. (See Section 9A.)
2. This results in the following:
a. The forward and after service air line
valves on the 225-pound service air manifold
are locked open.
b. There is 225-pound air in the forward
and after service air lines.
9K2. Steps in operation.
1. Open the forward trim tank vent valve
on the torpedo tube blow and vent manifold
in the forward torpedo room.
2. Turn the three-way cock on the starboard
side of the forward torpedo room to the
vent inboard position.
3. Open the No. 6 torpedo tube drain
valve on the torpedo tube drain manifold.
4. Open the forward torpedo tube drain
stop valve to the WRT tank.
5. Open the forward WRT tank overflow valve.
6. Open the 225-pound air supply valve
to the forward torpedo tube blow and vent
manifold.
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7. Open the No. 6 torpedo tube blow
valve on the forward torpedo tube blow and
vent manifold. Observe the No. 6 torpedo
tube pressure gage in order not to exceed the
required pressure.
(Assuming the WRT tank is full, water
is now being transferred from the torpedo
tube through the WRT tank and into the
forward trim tank.)
8. Shut the No. 6 torpedo tube blow valve
when the column gage on the torpedo tube
shows that the tube is empty.
9. Shut the No. 6 torpedo tube drain
valve on the torpedo tube drain manifold.
10. Shut the forward torpedo tube drain
stop valve to the WRT tank.
11. Shut the forward WRT tank overflow
valve.
12. Shut the 225-pound air supply valve
to the forward torpedo tube blow and vent
manifold.
13. Shut the forward trim tank vent valve
on the forward torpedo tube blow and vent
manifold.
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Figure 9-11. BLOWING FROM THE NO. 6 TORPEDO TUBE TO THE FORWARD TRIM TANK BY WAY OF THE
FORWARD WRT TANK.
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L. PUTTING THE NO. 4 FRESH WATER TANK ON SERVICE |
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(Figure 9-12) |
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9L1. Preparation.
1. Rig the 22 5-pound service air manifold. (See Section 9A.)
2. This results in the following:
a. The forward and after service air line
valves on the 225-pound service air manifold
are locked open.
b, There is 225-pound air in the forward
and after service air lines.
9L2. Steps in operation.
1. Open the 225-pound service air valve
to the 12-pound reducer in the control room.
2. Open the 12-pound service air valve
from the reducer in the control room.
3. Open the No. 4 fresh water tank blow
valve in the control room.
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The No. 4 fresh water tank is now under
12-pound pressure and is on service provided
the proper fresh water system connections are
made.
9L3. Taking the No. 4 fresh water tank off
service.
1. Shut the No. 4 fresh water tank blow
valve.
2. Open the No. 4 fresh water tank vent
valve to release pressure from the tank.
3. Shut the No. 4 fresh water tank vent
valve when the gage shows that the pressure
is relieved.
4. Shut the 12-pound service air valve
from the reducer.
5. Shut the 225-pound service air valve
to the 12-pound reducer.
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Figure 9-12. PUTTING THE NO. 4 FRESH WATER TANK ON SERVICE
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M. PUTTING THE NO. 2 BATTERY WATER TANK ON SERVICE |
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(Figure 9-13)
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9M1. Preparation.
1. Rig the 225-pound service air manifold. (See Section 9A.)
2. This results in the following:
a. The forward and after service air line
valves on the 225-pound service air manifold
are locked open.
b. There is 225-pound air in the forward
and after service air lines.
9M2. Steps in operation.
1. Open the 225-pound service air valve
to the 8-pound reducer in the forward battery
room.
2. Open the 8-pound service air valve
from the reducer to the forward group of
battery water tanks.
3. Open the No. 2 and No. 4 battery
water tanks blow valve.
4. Open the No. 2 battery water tank
blow valve.
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The No. 2 battery water tank is now under
8-pound pressure and is on service provided
the proper battery water system connections
are made.
9M3. Taking the No. 2 battery water tank off
service.
1. Shut the No. 2 and No. 4 battery water
tanks blow valve.
2. Open the No. 2 and No. 4 battery water
tanks vent valve in the forward battery room
to release pressure from the No. 2 tank.
3. Shut the No. 2 and No. 4 battery water
tanks vent valve when the pressure gage at
the tank indicates zero pressure.
4. Shut the No. 2 battery water tank blow
valve.
5. Shut the 8-pound service air valve
from the reducer to the forward group of
battery water tanks.
6. Shut the 225-pound service air valve
to the 8-pound reducer.
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Figure 9-13. PUTTING THE NO. 2 BATTERY WATER TANK ON SERVICE.
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