Description
PSS Shaft Seal 1-⅜" Shaft 2-½" Tube | Boat Supply Store
This PSS Shaft Seal offers a superior, maintenance-free alternative to traditional stuffing boxes, eliminating bilge water ingress and reducing propeller shaft wear. Engineered with a 7.38" total length and a 2.875" rotor diameter, it creates a mechanical face seal between a rotating stainless steel rotor and a stationary carbon flange for a 100% watertight seal. This advanced system is ideal for offshore fishing vessels operating in the Gulf of Mexico or coastal cruisers navigating the Intracoastal Waterway, providing reliable operation and significantly reducing maintenance demands.
Key Features
- Eliminates maintenance and constant adjustment of traditional packing glands
- 100% water tight, eliminating water in the bilge
- Reduces wear to the propeller shaft
- Easily retrofitted to existing vessel configurations
- Compensates for most misalignment and vibration issues
- Mechanical face seal created between rotating stainless steel rotor and stationary carbon flange
- Certified by Bureau Veritas, ABS & Rina
- Low maintenance operation for extended cruising
Specifications
| Product Specifications | |
|---|---|
| Shaft Diameter | 1-3/8" |
| Stern Tube Diameter Range | 2-1/2" to 2-5/8" |
| Total Length | 7.38" |
| Compressed Length | 6.38" |
| Rotor Diameter | 2.875" |
| Carbon Cuff Diameter | 2.5" |
Who This Is For
Boat owners and builders seeking a reliable, low-maintenance, and leak-free alternative to traditional stuffing boxes for their marine propulsion shafts. This system is designed for those prioritizing reduced bilge water and minimized shaft wear over the lifespan of their vessel.
How It Compares
| Feature | PSS Shaft Seal 1-⅜" Shaft 2-½" Tube | Competitor |
|---|---|---|
| Shaft Diameter | 1-3/8" | 1-3/8" |
| Stern Tube Diameter Range | 2-1/2" to 2-5/8" | 2-1/2" |
| Seal Type | Mechanical Face Seal | Lip Seal |
| Maintenance Requirement | Minimal (periodic inspection, 6-year bellow replacement) | Periodic inspection, potential adjustment |
| Water Tightness | 100% Water Tight | Excellent |
Common Concerns Answered
Why choose a PSS Shaft Seal over a traditional stuffing box?
The PSS Shaft Seal provides a 100% watertight seal, eliminating the need for constant adjustment and preventing bilge water ingress, a common complaint with traditional packing glands. It also significantly reduces wear on the propeller shaft, a benefit not offered by conventional systems.
What is the expected lifespan and maintenance of a PSS Shaft Seal?
While the mechanical face seal offers extended reliability, the bellows are recommended for replacement every 6 years. This periodic replacement, along with general inspection, constitutes the primary maintenance requirement, vastly simplifying upkeep compared to stuffing boxes.
Is the initial cost of a PSS Shaft Seal justified?
The upfront investment in a PSS Shaft Seal is offset by its long-term benefits: zero routine maintenance, elimination of bilge water issues, and reduced shaft wear, which collectively contribute to lower operational costs and increased vessel reliability over time.
Frequently Asked Questions
What is the PSS Shaft Seal?
The PSS Shaft Seal is a dripless marine shaft seal system that utilizes a mechanical face seal between a rotating stainless steel rotor and a stationary carbon flange to prevent water from entering the bilge.
How does the PSS Shaft Seal work?
It creates a watertight seal by precisely mating a polished stainless steel rotor, attached to the propeller shaft, with a split carbon sacrificial face, mounted to the stern tube. This creates a virtually leak-free barrier.
What are the benefits of using a PSS Shaft Seal over traditional packing glands?
Benefits include eliminating routine adjustments, preventing bilge water intrusion, reducing wear on the propeller shaft, and compensating for shaft misalignment and vibration, leading to less maintenance and a drier bilge.
Can the PSS Shaft Seal be retrofitted to my existing boat?
Yes, the PSS Shaft Seal is designed for easy retrofitting onto most vessels. Installation may require cutting the stern tube to the correct length and securing the unit with appropriate hose clamps.
What is the shaft diameter and stern tube diameter for this PSS Shaft Seal model?
This specific PSS Shaft Seal model is designed for a 1-3/8" shaft and fits stern tubes ranging from 2-1/2" to 2-5/8" in diameter.
