Propeller shaft mechanical seal MTM430

for shipsboatelectronic control

It is surely the more resistant propeller shaft mechanical seal on the market. The MTM400, in comparison with all the existing propeller shaft mechanical seals, is the first in the world to be equipped with a double series of springs. This allows it to better compensate for angular and radial misalignments. Moreover, springs together with a double system of o-rings give rise to what Microtem has named DEDaS® (Double Elastic Damping System), that is an elastic damping system able to make the MTM400 resistant to 60 g shock and to 60 mm/s (RMS) of vibration. Inside of it, in the rotating part, there is another international recognised innovation: the pumping ring. This technology, newly introduced in the propeller shaft seals, ensures that the cooling fluid (usually water) is distributed to a greater and better extent on the sliding faces, increasing the heat dissipation and thus reducing consumption. All this allows MTM400 to achieve performance over 60.000 hours of operation before maintenance. Of equal importance is the design, as its compact size allows the seal to be one of the axially smaller solutions in the world. Thanks to the “Repair Kit” in two halves the maintencance can be caried out directly on the mechanical seal without decoupling the shaft from the coupling. Additionaly, the MTM400 together with the hydraulic barrier system (Watershield) allows to carry out maintenance with the boat in the water. It is designed for shafts with diameter 50 mm to 800 mm, and it is certified by RINA. There are different possible material configurations and it is the only product to be certified, as standard, for fire resistance.