SKU: 16501603821

PSS Shaft Seal 45mm Shaft 3-1/4" Tube

Sale price$241.20 Regular price$268.00
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Description

PSS Shaft Seal 45mm Shaft 3-1/4" TubeShaft Seal 45mm Shaft & 3 1 4" Tube This Type A 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 PSS Shaft Seal is the #1 selling marine mechanical seal worldwide and is installed as standard equipment by many of the world's most reputable boat builders and boat yards. The PSS Shaft Seal is also recognized as the premiere

Shaft Seal 45mm Shaft & 3-1/4" Tube

This Type A 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 PSS Shaft Seal is the #1 selling marine mechanical seal worldwide and is installed as standard equipment by many of the world's most reputable boat builders and boat yards. The PSS Shaft Seal is also recognized as the premiere retrofit (aftermarket) seal on the world market. Boat builders and boat yards recognize the advantages and value of installing the PSS, as it eliminates the maintenance, constant adjustment, and cost associated with traditional packing-type glands. Aside from these benefits, the PSS Shaft Seal helps to eliminate water in the bilge (100% watertight) and wear to the propeller shaft. 

How Does it Work?

  1. Two nitrile o-rings seal the stainless steel rotor to the shaft and will not experience wear.
  2. A primary set screw and a backup set screw (2 sets) are used to secure the stainless steel rotor to the shaft.
  3. A seal is created between the two flat surfaces of the carbon stator and the stainless steel rotor.
  4. Water is fed into the PSS Shaft Seal for cooling/lubricating the seal faces on high-speed vessels.
  5. The stationary carbon stator is attached to the nitrile bellow, which is attached to the stern tube (shaft log).

Rotor 

The rotor is made out of 316L stainless steel and machined to a 9-12Ra finish on precision CNC lathes. It is secured on the shaft using 2 pairs of set screws positioned at a 90-degree angle for maximum holding power. The stainless steel rotor further polishes the carbon stator during the initial hours of operations.

Carbon Stator

The high-density, resin-impregnated carbon stator is manufactured from an advanced composite that is first mixed and molded and then formed under pressure. The blank parts are then baked, machined, and lapped to a measured flatness of 4 helium light bands (measured at 0.000044" of variation over its entire lapped surface). The grade of carbon composite used in the PSS Shaft Seal has a maximum operating temperature of 500°F (+260°C) and cannot melt if the seal runs dry for a short period of time, unlike a lip seal or a plastic face seal. In addition, the high density of the carbon greatly increases longevity and wear resistance. As a result, several commercial vessels have recorded over 40,000 engine hours (over 4 1/2 years of continuous operation) on the same original components.

Bellows

The bellows on the Type A seal are molded out of a Nitrile compound. Nitrile is known for its good resistance to petroleum products. In addition, it provides the best combination of durability, strength, and elasticity necessary for this application.

Hose Barb

For high-speed vessels (12+ knots), a positive water supply is required to be plumbed to the PSS Shaft Seal for lubricating and cooling the seal faces. Please review the PSS Shaft Seal Installation Instructions for more information on pickup points for water supply. In most cases, a slow-speed boat (less than 12 knots) that does not have a bearing on the shaft log does not require positive water feed and can simply be vented. Ideally, the vent line will be run at least 2-3 feet above the waterline and as close to the centerline as possible. This will ensure the vent hose is never below the water line, even with significant healing. PSS Shaft Seal Installation Instructions have more details on venting the seal.

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
  • Carbon Graphite: Lapped to 4 HLB (0.000044" tolerance)
  • 316SS / Nitronic 50: Faced to 9-12 Ra
  • Bellows Material: Molded Nitrile - PVC
  • Shaft Diameter: 45mm
  • Stern Tube Diameter (inch): 3-1/4" to 3-3/8"
  • Approximate Length: 9.2175 in.
  • Approximate Compression: 1 in. 
  • Rotor Diameter: 3.75 in. 
  • Stern Cuff Length: 2 in.
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: 16501603821

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4.3 ★★★★★
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Verified Purchase
peppergal
Houston, US
★★★★★ 5
Exactly what I needed
Size: 100 Pack
These are great for making cleanup from cooking easier. Like most disposable pans, these are a little on the flimsy side when loaded with food, but I either put them on a cookie sheet or inside another baking pan for loading into and out of the oven, and they work great that way.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 15, 2020
H
Verified Purchase
Harvey Jackson
Cuba, US
★★★★★ 1
Horrible quality. Manufacturer has created absolute junk.
Size: 100 Pack
I have bought these pans many times and I’ve been very happy with them. However, the most recent batch I got of 100 was shockingly inferior to what I received before they are of such poor quality that they bend like a piece of aluminum foil. they are dangerous to cook with if you pick them up. They just bend. Usually, they are packed in a carton which then is inside the Amazon box. This time, they were just in the Amazon carton and then arrived crumpled and crushed. Wherever they bought them from is a disgrace. I will never buy them again. They are a disaster and dangerous to use in your oven.
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Reviewed in the United States on January 1, 2025
C
Verified Purchase
Capri D. Moore
Port Orchard, US
★★★★★ 5
SORRY WRONG SIZE ORDERED
Size: 100 Pack
THE ITEM APPEARED TO BE FINE BUT WERE JUST TOO SMALL FOR WHAT WE NEEDED. SORRY THAT I HAD TO RETURN THEM,
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on November 16, 2025
H
Verified Purchase
H Family
Whiting, US
★★★★★ 5
Good stuff
Size: 100 Pack
Excellent materials. As advertised-no surprises with finding stamped foil that doesn’t hold its contents. My wife uses these to bring food to my work and she is perceived as a professional chef.
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Reviewed in the United States on February 26, 2021
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Verified Purchase
Wendy
Chelsea, US
★★★★★ 4
Would probably buy again.
Size: 100 Pack
A little thinner than what we usually buy. But worked out. Good for the price.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on December 7, 2020

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