- Description
The PSS Shaft Seal
is a mechanical face seal. The sealing surface
is created between the flat surfaces of the rotating stainless-steel
rotor and the stationary carbon flange. The stationary carbon flange is
attached to the front side of the bellows with hose clamps, and the back
end of the bellows fits over the Stern tube and is secured with hose
clamps. The stainless-steel rotor is fitted on the shaft in front of the
carbon flange. The stainless-steel rotor compresses the bellows before
the rotor is secured to the shaft with set screws. This compression
(pre-load) maintains constant contact between the two flat faces of the
stainless-steel rotor and carbon flange, allowing the PSS to compensate
for the variable fore and aft movement due to propeller thrust. In
addition, the carbon flange is over-bored to the shaft diameter allowing
it to “float” around the shaft and thus compensate for most
misalignment and vibration problems. The stainless-steel rotor is sealed
to the shaft by two O-rings recessed into the collar's bore. These
O-rings rotate with the shaft and stainless-steel rotor and do not
experience wear during operation.
Specifications:
Temperature Limits
5°F to 225°F (-15°C to 107°C)
Pressure Limits
15 PSI (1 BAR)
Shaft RPM Limits
10,000 RPM
