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The P3 type KOBELCO AIR SEAL has a simplified structure. Air, supplied from the air source within the ship, passes through #2/3 chamber and is spouted into the sea water. Any change of draft is automatically detected by the air control unit and pressure is adjusted to maintain the optimum pressure on each part.
Features
1)High Reliability: High reliability is realized with the following two measures:
*small pressure difference on all sealing rings.
*The provision of two sealing rings on sea water side and stern tube oil side. Even if the oil sealing are damaged the leaked oil is completely collected in an air chamber between sealing rings.
2)Easy Maintenance: Any draft change is automatically detected and the stern tube pressure changes in accordance with draft changes even on vessels with numerous draft changes due to loading conditions.
3)Low Air Consumption: Air is supplied to the #2/3 chamber controlling the chamber pressure with a small amount of air constantly flowing out the drain tank to avoid air deposition in the line. Total air consumption is less than 50 N (find symbol for litres)/min.
4)Various Emergency Measures: Emergency measures include spare sealing rings and air control devices. It is possible to convert from air seal systems to Double Security Type COMPACT Seals with simple valve operations, provided that an emergency stern tube gravity tank is prepared.
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