- World leading dripless mechanical face seal for marine applications.
- Ideal replacement for packing glands and lip seals in marine or industrial environments
- Highly durable, low maintenance and cost-effective solution.
- Certified by ABS, BV (or Bureau Veritas), RINA, and US Coast Guard approved.
- Manufactured in the USA.
How The PSS Shaft Seal Works
- Two nitrile o-rings seal the stainless steel rotor to the shaft and will not experience wear.
- A primary set screw and a backup set screw (2 sets) are used to secure the stainless steel rotor to the shaft.
- A seal is created between the two flat surfaces of the carbon stator and the stainless steel rotor.
- Water is fed into the PSS Shaft Seal for cooling/lubricating the seal faces on high speed vessels.
- The stationary carbon stator is attached to the nitrile bellow, which is attached to the stern tube (shaft log).
Stainless Steel Rotor
The rotor is manufactured out of 316L stainless steel and machined to a 9Ra finish on precision CNC lathes. It is secured on the shaft using 2 pairs of set screws positioned at 90 degrees angle for maximum holding power. The carbon stator further polishes the rotor during the initial hours of operations. This rotor does not need replacement or maintenance under normal operating conditions.
Carbon Stator
The high density, resin impregnated carbon stator is manufactured from a space age composite which is first mixed and molded, 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. 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 bellow on the Type A seal is molded out of a Nitrile compound. Nitrile is known for its good resistance to petroleum products. It provides the best combination of durability, strength and elasticity necessary in 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 the purpose of 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 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 water line and will be as close to the center line as possible. This will ensure the vent hose is never below the water line, even with significant heeling. PSS Shaft Seal Installation Instructions has more more details on venting the seal.
BEST SELLERS
From the manufacturer
How The PSS Shaft Seal Works
- Two nitrile o-rings seal the stainless steel rotor to the shaft and will not experience wear.
- A primary set screw and a backup set screw (2 sets) are used to secure the stainless steel rotor to the shaft.
- A seal is created between the two flat surfaces of the carbon stator and the stainless steel rotor.
- Water is fed into the PSS Shaft Seal for cooling/lubricating the seal faces on high speed vessels.
- The stationary carbon stator is attached to the nitrile bellow, which is attached to the stern tube (shaft log).
Stainless Steel Rotor
The rotor is manufactured out of 316L stainless steel and machined to a 9Ra finish on precision CNC lathes. It is secured on the shaft using 2 pairs of set screws positioned at 90 degrees angle for maximum holding power. The carbon stator further polishes the rotor during the initial hours of operations. This rotor does not need replacement or maintenance under normal operating conditions.
Carbon Stator
The high density, resin impregnated carbon stator is manufactured from a space age composite which is first mixed and molded, 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. 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 bellow on the Type A seal is molded out of a Nitrile compound. Nitrile is known for its good resistance to petroleum products. It provides the best combination of durability, strength and elasticity necessary in 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 the purpose of 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 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 water line and will be as close to the center line as possible. This will ensure the vent hose is never below the water line, even with significant heeling. PSS Shaft Seal Installation Instructions has more more details on venting the seal.
BEST SELLERS
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