It is the most advanced mechanical seal alternative to the classic rubber bellows systems. The MTM905 propeller shaft mechanical seal is the first system designed for stern tube to combine the safety of the integrated pneumatic barrier Watershield®, with the technology of the split rings.
Thanks to its design, it is the world's most compact split shaft seal with integrated safety barrier. The stationary case can accommodate up to 6 radial holes (optional) that can be used to connect: an additional flushing, a temperature sensor, a vibration sensor (triaxial), a pressure sensor or a dedicated vent line.
The stationary ring can be supplied in Silicon Carbide (S1) or in Tungsten Carbide (T1) and is expected to be inserted in a 316 stainless steel case.
The rotating ring is connected to the propulsion shaft with a clamp that drive radially the rotating case provided in 316 stainless steel with insert in Graphite Resin (G2), Graphite Antimony (G3), Silicon Carbide (S1) or Tungsten Carbide (T1).
Thanks to SpliTEM® technology, the sliding rings (stationary and rotating), made in two halves, allow maintenance to be carried out directly in the water and/or with the propulsion shaft in position, with a significant cost saving.
The pneumatic barrier ring Watershield®, integrated into the stationary case, makes the MTM905 the most technologically advanced product in the market for propeller shaft seals for tube installation.
The integrated preload system guarantees an extremely simple installation that does not require any particular specialization.
Suitable for all kind of vessels.