PSS PRO Shaft Seal - For 1-1/4" to 3-3/4" Shafts

6 total reviews

03-314-514

$ 2,194.50 USD

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Size Guide
  • Description

    The PSS PRO Shaft Seal is a mechanical face seal utilizing our proven stainless steel and carbon sealing components but adds reinforced silicone bellows, 316 Stainless Steel hose clamps (rolled edges & non-perforated), and an optional Nitronic 50 rotor upgrade (for highly corrosive environments). Designed specifically for applications that will require increased durability and resistance to harsh, corrosive, high pressure, and otherwise demanding environments. The PSS PRO Shaft Seal is a specialized mechanical seal that is suitable for a variety of applications, with unmatched performance.

    Certifications
    1. ABS Certified
    2. RINA Certified
    3. Bureau Veritas Certified
  • Documents
    1. PSS Type A & PRO Shaft Seal Installation Instructions
    2. PSS Type B Shaft Seal Installation Instructions
    3. PSS Shaft Seal Warranty

Customer Reviews

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How Does It WOrk?

1. Two nitrile o-rings seal the stainless steel rotor to the shaft and will not experience wear.

2. The Shaft Retention Collar is attached to the shaft and helps retain the propeller or rudder shaft in your vessel in the event of catastrophic failure of the coupling or if the shaft comes free from the coupling.

3. A seal is created between the two mating faces of the carbon stator and the stainless steel rotor.

4. A seal is created between the two mating faces of the carbon stator and the stainless steel rotor.

5. Raw water is fed to the PSS Shaft Seal for cooling / lubricating the seal faces on high speed vessels.

6. Hose clamp tail protection, Clamp Jackets.

7. The stationary carbon stator is attached to the bellows, which is secured to the stern tube (shaft log).

8. 316SS hose clamps with rolled edges and non-perforated band.

Shaft Retention Collar for PSS PRO Shaft Seal

Shaft Retention Collar

The PYI Shaft Retention Collar is designed to help retain the propeller or rudder shaft in your vessel in the event of catastrophic failure of the coupling or if the shaft comes free from the coupling. The double split design provides the maximum in axial holding power with the benefit of quick and efficient assembly with the shaft installed. Design fully engages the shaft without marring. Easily installed where major disassembly would otherwise be required. Greater axial holding power than set screw or one-piece clamping collars. Effective on hard and soft shafts.

Stainless steel rotor for a PSS PRO Shaft Seal

Rotor

The PSS stainless steel rotor is slid down the shaft and is secured to the shaft with set screws at 90° for maximum holding power. Precision tolerances are maintained by computer controlled lathes. The faces have a number 9 micro finish and are perpendicular to the bore to prevent run-out as the collar rotates. The carbon graphite stator will polish the face of the rotor during the first few minutes of operation. The stainless steel rotor should not need to be replaced under normal operating conditions. The stainless steel rotor used on the PSS Type A Shaft Seal is made from 316L stainless steel.

Carbon Stator for a PSS PRO Shaft Seal

Carbon Stator

The high density, resin impregnated carbon/graphite stator is a composite that is first mixed, molded and then formed under pressure. The blanks are then baked, machined and lapped. The face of our carbon is finished to a flatness of 4 helium light bands (measured .000044" of variation over entire lapped surface). The grade of carbon used in the PSS has an operating temperature over 500° Fahrenheit (+260° Celsius), and cannot melt if the seal runs dry, unlike a rubber lip seal or plastic face seal. The high density of the carbon greatly increases the longevity and wear resistance. Several commercial vessels have recorded over 40,000 (over 4-1/2 years of continuous operation) engine hours on the same, original components. The carbon should not need to be replaced under normal operating conditions.

Bellow

The PSS PRO Shaft Seal bellow provides the best combination of durability, strength and elasticity. It's constructed of four ply aramid / silicone with a flurosilicone outer. This flurosilicone cover creates an oil and fuel resistant barrier protecting the exterior surface from the possibility of damage from splash or spill. Both ends of the bellow are sealed. The four ply cloth inlay provides excellent strength and resistance to abrasion. This bellow has a continuous operating temperature range of -90°F to +425°F (-70°C to +220°C).

Installation Video

Customer Reviews

Based on 6 reviews
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Robert Turner

PSS PRO Shaft Seal - For 1-1/4" to 3-3/4" Shafts

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stratulat florentin

PSS PRO Shaft Seal - For 32mm to 80mm Shafts

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Sean
Great product, lacking correct install instructions.

Product itself seems to be great! We installed the shaft seal with recommended 3/4 inch compression and it leaked terribly. PYI suggested increasing compression in 1/8 increments and it took another 5/8 of an inch compression to stop the leak under a load. I talked with another installer and he said he always has to add at least 3/8 more compression to almost every install. It would be nice to know that in the beginning as I have to take apart major engine components to reach the seal.

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Eric Hick
Exactly what I ordered - on time.

I shopped around and found this part a lower cost, but the help I assistance I received and exact description of the parts was well worth the cost. Happy to support companies that provide great customer service!

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Charles Antal
Marine Trader Trawler PSS Retrofit

I have upgraded all the auxiliary cruising and racing sailboats i have owned with a PYI Packless Sealing System. they have been giving me great performance for 25 years, and I expect the same on my first twin engine trawler.