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7 Cards in this Set
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High Pressure (HP) Air system
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Any air compressor that discharges at a pressure greater than 1000 PSI is classified hp. When placed in automatic, our systems operate between 2800-3000 PSI. They are 5 stage, reciprocating, motor driven, oil free air compressors manufactured by Worthington.
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Low Pressure (LP) Air system
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Any air compressor that discharges at a pressure of 150 PSI or less is classified LP air. We maintain ship's service air pressure between 115-125 PSI. They are 2 stage, reciprocating, motor driven, oil free air compressors manufactured by RIX. A priority valve isolates ship service air automatically at 85 PSI to save LP air for control air. There is one for each LPAC.
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High Pressure Air Compressors (HPACs)
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Located in the Engine Room, lower level, STBD side. HP air is primarily used to supply the EDG's with air to start, and also as an emergency source of control air for the engineering PLANT.
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Low Pressure Air Compressors
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LP is supplied throughout the ship for vital/non-vital systems such as pneumatic tools, laundry equipment, and control air. LP #2 is located in the engine room, upper level, STBD side, and LP’s #1,3,4 on the lower level.
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Air dehydrators
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4 ships service air, 2 electronic dry air.
Remove water/moisture from air that has been compressed. The four for ships service air cools the air by using chilled water. The moisture condenses and is blown out of the system. The two for electronic dry air uses desiccant beads to absorb moisture. All are located in the engine room, lower level. |
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HP to LP cross connect (HP TO LP REDUCER)
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1. Reduces hp air pressure to 150 PSI and supplies the air to the LP air system
2. Used only in an emergency to supply control air to the engineering plant if all 4 LPACs fail. |
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Receiver/air flask
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1. Storage area for compressed air.
2. Provides a smooth discharge of air by eliminating the slugging effect created by the reciprocating action of the compressor pistons. 3. LP air systems have receivers (1 for each LPAC, 1 in fire room for control air) 4. HP air systems have flasks (1 for each HPAC, 2 for each EDG) |
