PSS Shaft Seal

The PSS Shaft Seal uses the highest quality materials and manufacturing procedures to give drip free performance.

PSS Shaft Seal

The Seal is created by contact of the carbon face against the rotating stainless steel rotor. A hydrodynamic bead of water between the carbon seal and rotor provides lubrication. The carbon seal and bellows assembly is fitted to the stern tube by twin stainless hose clamps. Contact with the rotor is assisted by water pressure which helps to cool the assembly. Seal contact is unaffected by the engine laterally or fore of aft.

The PSS Shaft seal uses the highest quality materials and manufacturing procedures to give drip free performance with zero wear to the propeller shaft and the capability of operating safely up to 500 F. They require no lubrication other than the water they are working in. A fitting is provided on carbon flange to accept a feed from the engine's water exhaust to assist cooling.


  • Dripless Operation
  • Maintenance Free
  • Eliminates Shaft Wear
  • No Mess Or Corrosion
  • 3 Year Guarantee
  • ABS Approved
  • Over 100,000 in successful operation
  • Suitable for leisure & commercial craft
  • Unaffected by engine movement or vibration
  • Manufactured in the USA
  • Metric & Imperial sizes for shafts from 20mm - 3/4 " to 100mm-4"
  • The carbon/graphite flanges & rotor should never need replacing under normal operating conditions

Techical Specifications

High Density Carbon Graphite Flange. Once installed and operational the carbon/graphite face will polish the stainless steel rotor during the initial first few minutes of operation ensuring a perfect fit thus eliminating any drips or spray. The ultra dense carbon/graphite composite has a maximum operating temperature of 500 F, guarding against failure by over heating as can occur on rubber and plastic based seals.

Stainless Steel Rotor

The one-piece, 316 grade stainless steel rotor is secured to the propeller shaft with double set screws. The twin nitrile 'O' rings are stationary and do not wear.

Reinforced Bellows

The heavy reinforced nitrile bellows are resistant to petroleum based products and retain their preset dimensions. They provide the best combination of durability, strength and elasticity.
Due to continued development by the manufacturers, rights are reserved to alter, modify or replace any specification or design feature without prior notice-check when ordering

Shaft Diameter Stern Tube Diameters Compressed Length
3/4, 7/8, 20mm, 22mm 1¼, 1½, 1¾, 2,2¼ HS 6 1/4"
1, 1 1/8, 25mm, 28mm, 30mm 1¼, 1½, 1¾, 2,2¼ HS 6 1/4"
1 1/4, 1 3/8, 32mm, 35mm 1¾, 2,2¼, 2 ½ HS 6 1/2"
1 ½, 40mm 2,2¼, 2 ½, 2 3/4, 3", 3 1/4", 3 1/2" HS 8 ½"
1 ¾, 45mm 2¼ 2 ½, 2 ¾, 3, 3¼, 3½ HS 8 ½"
1 ¾, 45mm 2¼ 2 ½, 2 ¾, 3, 3¼, 3½ HS 8 ½"
2", 50mm, 55mm 2¼ 2 ½, 2 ¾, 3, 3¼, 3½ HS 8 ½"
2¼, 2 ½, 60mm 65mm 3 ¼, 3 ½, 3 ¾, 4 HS 8 ¾"
2 ¾, 70mm 4", 4 ¼, 4 ¾, 5" HS 9 ½"
3" 75mm. 80mm 4", 4 ¼, 4 ¾, 5" HS 9 ½"

Series One Seal

Designed for stainless steel propeller shafts for smaller boats, the seriesOne shaft seal is available in 3/4, 7/8", 1", 1 1/8" and 1 1/4" sizes. For metric applications, seriesOne is available in 22mm, 25mm and 30mm sizes. The seriesOne shaft seal is available for single engine applications only.

Housing: A one piece body of complex composite material which allows the bearing surface to provide long life and a stable performance platform for the lip seal. The body material does not absorb water and is temperature resistant. Bearing: A unique structure in shaft body design has the body and bearing of the same material. From concept to reality, this design affords the boat owner a reliable, durable, component at the price of an "old fashioned" packing seal.

Hose: Matched to various service demands, there are options which will add life to you seriesOneTM seal simply by identifying the application environment. For work boats with softer engine mounts, small diesel engine applications such as on sailboats, or other shafts that exhibit more lateral movement during operation, the mulit- articulated hose is recommended.

WATER INJECTION HOSE KITS FROM £16 + VAT (inc hose ,clips & tee piece )

Seal kit Assembly
1 1/8"
1 1/4"

We have a range of other seals avalible, these include:

RMTA Radice
Deep Sea
Tides Marine "Sureseal"

To find out more click on each of the seals to view our catalogue.