Air Seal AX
High reability is realized with the following two measures:
*Small pressure difference on all seal rings
*The provision of two seal rings on sea water side and stern tube side. Even if the oil seal rings are damaged the leaked oil is completely collected in an air chamber between seal rings.
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.
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 40Nl/min.
Various Emergency Measures
Emergency measures include spare seal 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 tank is prepared.