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7
OPERATING THE HIGH-PRESSURE AIR SYSTEM
 
A. RIGGING THE HIGH-PRESSURE MANIFOLD FOR DIVING
 
(Figure 7-1)
 
7A1. Preparation. 1. Shut all valves on the high-pressure manifold.

2. Open the bulkhead bank stop valves on all the air banks.

3. Open the regulator valves to the safety, negative, and bow buoyancy tanks.

4. Open the high-pressure air stop valves in each torpedo room.

7A2. Steps in operation.

1. Open the No. 2 air bank stop valve on the receiving manifold.

2. Open the No. 3 air bank stop valve on the receiving manifold.

3. Open the No. 4 air bank stop valve on the receiving manifold

(There should be at least three air banks on the manifold when rigged for dive. An air

  bank with a gage reading of less than 1500 psi should not be placed in service. The No. 1 air bank, because it is located inside the pressure hull, is normally held in reserve.)

4. Open the high-pressure air service forward supply valve on the lower distributing manifold.

5. Open the high-pressure air service aft supply valve on the lower distributing manifold.

6. Open the h igh-pressure air supply valves to 225-pound reducers.

7. Open the supply valve to 600-pound MBT blow manifold on the upper distributing manifold.

8. Open the emergency supply valve to 600-pound MBT blow manifold on the upper distributing manifold. The high-pressure air manifold is now rigged for diving.

 
41

Figure 7-1. RIGGING THE HIGH-PRESSURE MANIFOLD FOR DIVING.

 
B. BLOWING THE BOW BUOYANCY TANK
 
(Figure 7-2)
 
7B1. Preparation.

1. Shut all valves on the high-pressure manifold.

2. Open the bulkhead bank stop valves on all the air banks.

3. Open the regulator valves to the safety, negative, and bow buoyancy tanks.

  7B2. Steps in operation.

1. Open the No. 5 air bank stop valve on the receiving manifold.

2. Open the bow buoyancy blow valve on the upper distributing manifold.

3. When blowing is completed, shut the bow buoyancy blow valve.

4. Shut the No. 5 air bank stop valve on the receiving manifold.

 
42

Figure 7-2. BLOWING THE BOW BUOYANCY TANK.

 
C. BLOWING THE SAFETY TANK
 
(Figure 7-3)
 
7C1. Preparation.

1. Shut all valves on the high-pressure manifold.

2. Open the bulkhead bank stop valves on all the air banks.

3. Open the regulator valves to safety, negative, and bow buoyancy tanks.

7C2. Steps in operation.

1. Open the No. 1 air bank stop valve on the receiving manifold.

  2. Open the safety tank blow valve on the upper distributing manifold. Observe the safety tank pressure gage in order not to exceed the required pressure.

3. When blowing is completed, shut the safety tank blow valve.

4. Shut the No. 1 air bank stop valve on the receiving manifold.

 
43

Figure 7-3. BLOWING THE SAFETY TANK.

 
D. BLOWING THE NEGATIVE TANK
 
(Figure 7-4)
 
7D1. Preparation. 1. Shut all valves on the high-pressure manifold.

2. Open the bulkhead bank stop valves on all the air banks.

3. Open the regulator valves to the safety, negative, and bow buoyancy tanks.

7D2. Steps in operation.

1. Open the No. 3 air bank stop valve on the receiving manifold.

  2. Open the negative tank blow valve on the upper distributing manifold. Observe the negative tank pressure gage in order not to exceed the required pressure.

3. When blowing is completed, shut the negative tank blow valve.

4. Shut the No. 3 air bank stop valve on the receiving manifold.

 
44

Figure 7-4. BLOWING THE NEGATIVE TANK.

 
E. RIGGING FOR SURFACE FROM RIGGED FOR DIVE
 
(Figure 7-5)
 
7E1. Preparation.

1. The high-pressure manifold is rigged for dive with air banks Nos. 2, 3, and 4 on service. (See Section 7A.)

2. Open the bulkhead bank stop valves on all the air banks.

3. Open the regulator valves to the safety, negative, and bow buoyancy tanks.

4. Open the high-pressure air stop valves in each torpedo room.

  7E2. Steps in operation.

1. Shut the No. 2 air bank stop valve on the receiving manifold.

2. Shut the No. 3 air bank stop valve on the receiving manifold.

3. Shut the supply valve to the 600-pound MBT blow manifold.

4. Shut the emergency supply valve to the 600-pound MBT blow manifold.

The high-pressure air manifold is now rigged for surface. Note that air bank No. 4 remains on service.

 
45

Figure 7-5. RIGGING FOR SURFACE FROM RIGGED FOR DIVE.

 
F. CHARGING THE NO. 1 TORPEDO IMPULSE FLASK
 
(Figure 7-6)
 
7F1. Preparation.

1. Shut all valves on the high-pressure manifold.

2. Open the bulkhead bank stop valves on all the air banks.

3. Shut the high-pressure air stop valves in each torpedo room.

7F2. Steps in operation.

1. Open the No. 4 air bank stop valve on the receiving manifold.

2. Open the high-pressure air service forward supply valve on the lower distributing manifold.

3. Open the high-pressure air stop valve in the forward torpedo room.

4. Open the high-pressure air supply valve to the 600-pound reducer (impulse charging).

5. Open the supply valve from the 600-pound reducer to the impulse flask charging manifold.

  6. Open the No. 1 impulse charging valve on the impulse charging manifold, starboard side of the forward torpedo room. Observe the No. 1 impulse flask pressure gage in order not to exceed the required pressure.

7. When the required pressure has been reached, shut the No. 1 impulse charging valve on the impulse charging manifold.

8. Shut the supply valve from the 600-pound reducer to the impulse flask charging manifold.

9. Shut the high-pressure air supply valve to the 600-pound reducer (impulse charging).

10. Shut the high-pressure air stop valve in the forward torpedo room.

11. Shut the high-pressure air service forward supply valve on the lower distributing manifold.

12. Shut the No. 4 air bank stop valve on the receiving manifold.

 
46

Figure 7-6. CHARGING THE NO. 1 TORPEDO IMPULSE FLASK.

 
G. CHARGING THE NO. 1 AIR BANK WITH
THE NO. 1 AIR COMPRESSOR
 
(Figure 7-7)
 
7G1. Preparation.

1. Shut all valves on the high-pressure manifold.

2. Open the bulkhead bank stop valves on all the air banks.

7G2. Steps in operation.

1. Open the No. 1 air bank stop valve on the receiving manifold.

2. Open the supply valve, high-pressure air from compressors, on the receiving manifold.

3. Open the No. 1 high-pressure air compressor charging valve, in the pump room.

4. Start the No. 1 high-pressure air

  compressor. Carry out the operating routine for drains, pressures, temperatures, circulating water, lubrication, and speed. (See Section 2C.)

5. Stop the No. 1 high-pressure air compressor when the pressure gage for the No. 1 air bank shows that the required pressure has been reached.

6. Shut the No. 1 high-pressure air compressor, charging valve.

7. Shut the supply valve, high-pressure air from compressors, on the receiving manifold.

8. Shut the No. 1 air bank stop valve on the receiving manifold.

 
47

Figure 7-7. CHARGING THE NO. 1 AIR BANK WITH THE NO. 1 AIR COMPRESSOR.

 
H. CHARGING THE NO. 2 AIR BANK FROM THE DOCK
 
(Figure 7-8)
 
7H1. Preparation.

1. Shut all valves on the high-pressure manifold.

2. Open the bulkhead bank stop valves on all the air banks.

7H2. Steps in operation.

1. Open the drain cock on the external charging stop valve on the overhead above the high-pressure manifold in the control room. (This is a safety precaution which releases high-pressure air trapped between the valve and the cap.)

2. Remove the charging connection caps and connect the flexible copper high-pressure tubing to the dock connection and to the port external charging connection. As a safety measure, secure the tubing with a line to the dock and on the ship. This will prevent whipping in the event that the tubing breaks.

3. Shut the drain cock.

4. Open the external charging stop valve on the overhead above the high-pressure manifold.

  5. Open the external charging connection valve on the receiving manifold.

6. Open the No. 2 air bank stop valve on the receiving manifold.

7. Open the charging valve on the dock.

8. Shut the charging valve on the dock when the pressure gage for the No. 2 air bank shows that the required pressure has been reached.

9. Shut the external charging stop valve.

10. Shut the external charging connection valve on the receiving manifold.

11. Shut the No. 2 air bank stop valve on the receiving manifold.

12. Open the drain cock and release the pressure in the charging tubing.

13. Disconnect the copper charging tubing and replace the caps on the port external charging connection and on the dock connection.

14. Shut the drain cock on the external charging stop valve.

 
48

Figure 7-8. CHARGING THE NO. 2 AIR BANK FROM THE DOCK.

 
I. CHARGING THE HYDRAULIC ACCUMULATOR AIR FLASK
WITH HIGH-PRESSURE AIR
 
(Figure 7-9)
 
7I1. Preparation.

1. Shut all valves on the high-pressure manifold.

2. Open the bulkhead bank stop valves on all the air banks.

7I2. Steps in operation.

1. Open the No. 2 air bank stop valve on the receiving manifold.

2. Open the accumulator air flask charging valve on the hydraulic accumulator charging manifold.

3. Open the air valve to the hydraulic accumulator on the upper distributing

  manifold. Observe the accumulator air flask pressure gage in order not to exceed the accumulator air flask pressure.

4. When the required pressure has been reached, shut the air valve to the hydraulic accumulator on the upper distributing manifold.

5. Shut the accumulator air flask charging valve on the hydraulic accumulator charging manifold.

6. Shut the No. 2 air bank stop valve on the receiving manifold.

 
49

Figure 7-9. CHARGING THE HYDRAULIC ACCUMULATOR AIR FLASK WITH HIGH-PRESSURE AIR.

 
J. BYPASSING HIGH-PRESSURE AIR INTO THE 225-POUND
SERVICE AIR SYSTEM
 
(Figure 7-10)
 
7J1. Preparation.

1. Shut all valves on the high-pressure manifold.

2. Shut all the bulkhead bank stop valves.

3. Shut the forward and after stop valves for the No. 1 air bank. Only the after part of the No. 1 air bank will be used for this operation.

7J2. Steps in operation.

1. Open the No. 1 air bank after cutoff valve.

2. Open the No. 1 air bank stop valve on the receiving manifold.

  3. Open slowly the 225-pound bypass valve on the lower distributing manifold. Observe the pressure gage for the 225-pound service air manifold in order not to exceed the 225-pound system pressure.

4. When the required pressure has been reached, shut the 225-pound bypass valve on the lower distributing manifold.

5. Shut the No. 1 air bank stop valve on the receiving manifold.

6. Shut the No. 1 air bank after cutoff valve.

 
50

Figure 7-10. BYPASSING HIGH-PRESSURE AIR INTO THE 225-POUND SERVICE AIR SYSTEM.

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