Sternguard Last Modified 09.07.2008

Sternguard

Sternguard

Sternguard 4BL

The Sternguard stand-by seal 4BL is developed from the JMT MKII seals. It incorporates an extra (standby) seal ring, which can easily be activated by closing two valves in the engine room.

Under normal circumstances the standby ring is kept practically load-free, so no wear will occur. In case of an emergency, the seal ring is activated to perform as a normal oil side seal.

Sternguard MKII (M)

The Sternguard MKII (M) type sterntube seal is a lip type seal using NBR (≤ #380) or Viton seal rings (all sizes).

Both types are highly resistant to wear and to attack by seawater and oil. Sternguard MKII (M) seals are easily monitored. They can be inspected in situ and renewed without disconnecting the tailshaft assembly even without docking, provided that the vessel can be trimmed sufficiently.

Unnet aft seal protection system prevents lines or ropes from reaching the seals by the forward sliding face of the fin on a “P-Ring” which is pressed against the liner. Read more »

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