Description
PSS Shaft Seal 1-1/2" Shaft | Boat Supply Store
This PSS Shaft Seal system eliminates the frequent adjustments and mess associated with traditional packing glands. Engineered for 1-1/2" propeller shafts and stern tubes ranging from 2-1/2" to 2-5/8", it utilizes a mechanical face seal design for a guaranteed 100% watertight result. The stationary carbon flange and rotating stainless steel rotor construction ensures superior longevity and prevents shaft grooving, ideal for offshore fishing vessels navigating the Gulf of Mexico.
Key Features
- Eliminates packing gland maintenance and adjustment
- Guarantees 100% watertight operation
- Prevents propeller shaft wear and grooving
- Facilitates easy retrofitting to existing stern tubes
- Accommodates minor shaft misalignment and vibration
- Employs a reliable mechanical face seal
- Certified by leading marine authorities: Bureau Veritas, ABS, Rina
- Constructed with robust stainless steel and carbon components
Specifications
| Product Specifications | |
|---|---|
| Shaft Diameter | 1-1/2" |
| Stern Tube Diameter Range | 2-1/2" to 2-5/8" |
| Total Length (Uncompressed) | 9.175" |
| Compressed Length | 8.175" |
| Rotor Diameter | 3.75" |
| Carbon Cuff Diameter | 3.25" |
| Stern Cuff Length | 2" |
| Rotor Material | Stainless Steel |
| Stationary Flange Material | Carbon |
Who This Is For
Boat owners and professional marine mechanics seeking a definitive upgrade from traditional shaft sealing methods, prioritizing absolute watertight integrity and zero shaft wear. Ideal for those transitioning from traditional packing to a superior, long-term mechanical solution.
How It Compares
| Feature | PSS Shaft Seal 1-1/2" Shaft | Competitor |
|---|---|---|
| Shaft Diameter | 1-1/2" | 1-1/2" |
| Stern Tube Diameter | 2-1/2" to 2-5/8" | 2-1/2" |
| Seal Type | Mechanical Face Seal | Lip Seal, Water Lubricated Lip Seal |
| Maintenance | None required (bellows inspection recommended) | Periodic inspection and potential replacement of lip seals, Requires constant water flow, potential for wear |
| Water Tightness | 100% Watertight | Generally watertight, but lip seals can degrade, Relies on water lubrication, not inherently 100% dry seal |
Common Concerns Answered
What is the primary advantage of using a PSS Shaft Seal over traditional packing glands?
The primary advantage is its maintenance-free, 100% watertight operation, which eliminates shaft wear and the need for constant adjustment, unlike traditional packing glands that require periodic tightening and can lead to shaft grooving.
What causes premature wear on the PSS Shaft Seal bellows?
Premature wear can occur if the bellows are exposed to harsh chemicals, such as sulfuric acid from batteries, or prolonged exposure to ozone. Regular inspection and avoiding chemical spills are recommended.
Is the initial cost of a PSS Shaft Seal significantly higher than traditional packing glands?
While the initial purchase price may be higher than basic packing gland components, the PSS Shaft Seal offers a long-term cost-effective solution due to its zero maintenance requirements, elimination of shaft replacement, and extended operational life.
Frequently Asked Questions
How often should the PSS Shaft Seal bellows be replaced?
The bellows are designed for long service life and do not have a fixed replacement interval. Inspection for signs of wear, cracking, or chemical degradation during routine maintenance is recommended. Many seals remain operational for over a decade.
Can the PSS Shaft Seal be installed on any boat shaft size?
No, the PSS Shaft Seal is manufactured for specific shaft and stern tube diameter combinations. This model is designed for a 1-1/2" shaft and a stern tube diameter ranging from 2-1/2" to 2-5/8".
What is included in the PSS Shaft Seal Maintenance Kit?
A dedicated maintenance kit typically includes spare bellows, O-rings, and specialized lubrication if required for certain models, though this PSS model is largely maintenance-free beyond bellows inspection. Consult the product manual for specific kit contents.
What is the installation difficulty level for a PSS Shaft Seal?
Installation is rated 3/5. It requires precise measurement and cutting of the stern tube, along with careful alignment. While achievable for experienced DIYers with proper tools, professional installation is often recommended to ensure optimal performance and longevity.
How does the PSS Shaft Seal compensate for shaft misalignment?
The flexible elastomeric bellows incorporated into the PSS Shaft Seal design allow it to accommodate minor axial and radial misalignment of the propeller shaft, reducing stress on both the seal and the shaft itself.