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Home -> Shaft Seals -> PSS Shaft Seal -> PSS Shaft Seal 3 1/4"

For Shipping Outside of the United States, Please Call (866-790-7767) or Fill Out Our International Order Form for a Shipping Quote!
PSS Shaft Seal 3 1/4" [PSS3250]
Price: $1,296.95
* Stern Tube Diameter:
* Quantity:  
* = Required Field
PSS Dripless Shaft Seal for use with 3 1/4" Shaft Diameters...

Shaft Size:3 1/4"
Stern Tube O.D. 4 1/2" thru 6"
Compressed Length: 9 3/4"
Weight: 17 pounds

The PSS Shaft Seal is the number one selling marine mechanical seal worldwide and is installed as standard equipment by many of the worlds most reputable boat builders / yards. The PSS Shaft Seal is also recognized as the premiere retrofit (aftermarket) seal on the world market. Certified by Bureau Veritas, ABS & Rina: Boat builders / yards recognize the advantages and value of installing the PSS as it eliminates the maintenance, constant adjustment & cost associated with traditional packing type glands. Aside from these benefits, the PSS Shaft Seal helps to eliminate water in the bilge (100% water tight) & wear to the propeller shaft. The PSS Shaft Seal can be easily retrofitted and is available for shafts ranging from 3/4" (20mm) to 6" (150mm).

The PSS Shaft Seal is a mechanical face seal that 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 vessels stern tube with hose clamps and the carbon flange is attached to the front side of the bellows with hose clamps. The stainless steel rotor is fit on the shaft in front of the carbon flange. The stainless steel rotor is used to compress the bellows before the collar is secured to the shaft with set-screws. This compression (pre-load) maintains contact between the faces and allows the PSS to compensate for the thrust from the propeller. The carbon flange is bored larger than the shaft diameter allowing it to “float” around the shaft and thus compensate for most misalignment and vibration problems. The stainless steel collar is sealed to the shaft by two o-rings that are recessed into the bore of the collar. These o-rings rotate with the shaft and stainless steel rotor and do not experience wear during operation.


Other PSS Dripless Shaft Seals available.

0.750 PSS Dripless Shaft Seal

0.875 PSS Dripless Shaft Seal

1.000 PSS Dripless Shaft Seal

1.125 PSS Dripless Shaft Seal

1.250 PSS Dripless Shaft Seal

1.375 PSS Dripless Shaft Seal

1.500 PSS Dripless Shaft Seal

1.750 PSS Dripless Shaft Seal

2.000 PSS Dripless Shaft Seal

2.250 PSS Dripless Shaft Seal

2.500 PSS Dripless Shaft Seal

2.750 PSS Dripless Shaft Seal

3.000 PSS Dripless Shaft Seal

3.500 PSS Dripless Shaft Seal


Other Dripless Shaft Seals available.

Lasdrop Dripless Shaft Seal


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