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PSS-Dichtung 105 mm Welle, 6 1/4' Stevenrohr
The PSS shaft seal type B is a mechanical slide ring 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 attaches to the front of the bellows with hose clamps and the rear end of the bellows over the star tube and is secured with hose clamps. The stainless steel rotor is mounted on the shaft in front of the carbon flange. The stainless steel rotor is used to compress the bellows before the rotor is secured to the shaft with set screws. This compression (preload) ensures constant contact between the two flat sides of the stainless steel rotor and the carbon flange. This allows the PSS shaft seal to compensate for the variable forward and backward movement caused by the propeller thrust. The carbon flange is overbored to the shaft diameter, allowing it to 'float' around the shaft and thus absorbing most misalignment and vibration problems. The stainless steel rotor is sealed to the shaft by two O-rings set into the bore of the collar. These o-rings rotate with the shaft and stainless steel rotor and are not subject to wear during operation.
Temperature Limits: -13°F to 425°F (-25°C to 220°C)
Pressure Limits: 3.5 BAR (50 PSI)
Shaft Speed Limits: 7,000 rpm.
Carbon-Graphite: Lapped to 4 HLB (0.00000044' tolerance)
316SS / Nitronic 50: Versus 9 Ra
Bellows Material: Thorn shaped silicone/fabric -
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