SKU: 69727750318

PSS Shaft Seal 2-1/2" Shaft 4" Tube [02-212-400]

Sale price$323.28 Regular price$359.20
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Description

PSS Shaft Seal 2-1/2" Shaft 4" Tube [02-212-400]PSS Shaft Seal 2 1 2" Shaft 4" Tube Shaft Diameter: 2 1 2" Stern Tube Diameter (D): 4" Total Length (A): 9. 625" Total Length (compressed) (Compressed A): 8. 375" Rotor Diameter (B): 4. 2" Carbon Cuff Diameter (C): 3. 75" Stern Cuff Length (E): 2" 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

PSS Shaft Seal 2-1/2" Shaft 4" Tube

Shaft Diameter: 2-1/2"
Stern Tube Diameter (D): 4"
Total Length (A): 9.625"
Total Length (compressed) (Compressed A): 8.375"
Rotor Diameter (B): 4.2"
Carbon Cuff Diameter (C): 3.75"
Stern Cuff Length (E): 2"

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.


**As with any rubber hose below waterline, the PSS bellows must be inspected on a regular basis for any sign of wear, aging or chemical deterioration.
PYI suggests as preventative maintenance that the PSS bellow be replaced in
six year intervals. During bellows replacement it is recommended the o-rings & set screws in the stainless steel rotor also be replaced."

Bellows may need to be more frequently inspected in an environment where
non-sealed batteries emit sulfuric acid. Sulfuric acid vapor will accelerate rubber deterioration, as will an ozonater.

The Maintenance Kit includes the items you need to properly maintain your
PSS Shaft Seal. Included in the kit is one (1) PSS bellow, two (2) O-rings,
five (5) set screws, four (4) new hose clamps and an allen key.


Brochure (pdf)
Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 69727750318

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D. Hensley
Natrona Heights, US
★★★★★ 5
Really classy watch!
Color: Brown/Stainless Steel/White, Color: Brown/Stainless Steel/White
Really looking watch, it looks expensive! It gives more confidence when wearing outfits. It's simple to look at, very minimalist, but it shows the date and day. I really like the roman numerals too!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 8, 2026
A
Verified Purchase
Amazon Customer
Birmingham, US
★★★★★ 4
nice watch. but no instructions included.
Color: Black
Nice looking watch! Good quality. Keeps good time. But… Can’t get the date to adjust. No instructions included in the package, just a sticker naming the buttons.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on February 3, 2026
G
Verified Purchase
giovanni mannino
Port Orchard, US
★★★★★ 5
Appearance
Color: Black
Great looking watch,well priced,fast delivery,no complaints
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Reviewed in the United States on March 31, 2026
L
Verified Purchase
Lloyd
Bozeman, US
★★★★★ 5
Nice Bau Haus clone!
Color: Black
Shockingly nice Bau Haus clone. We'll see how it holds up over time but...appearance and comfort are first rate so-far.
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Reviewed in the United States on April 22, 2026
J
Verified Purchase
Julian M.
San Leandro, US
★★★★★ 1
QC Failure
Color: Black
Retro light works aleatory: Sometimes it activates a couple of seconds when button depressed, sometimes deactivated as soon as you release it. A gross quality control failure in a brand-new watch, very disappointing.
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Reviewed in the United States on April 15, 2026

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