Item no.
Type
for shaft
Stern tube-Ø
Length
Hose connection
Stock status
Price
Quantity
Type
shaft seal PSS
EAN 8396620014728
Model no. 02-30M-114
for shaft
30 mm
Stern tube-Ø
32 - 35 mm
Length
17.5 cm
Hose connection
10.0 mm
Stock status
Available within 1-3 days  
Price
Recommended retail price:
307,37 €
247,86 €
You save:
59,51 € (19%)
Excl. VAT, excl. shipping costs.
Quantity
Type
shaft seal PSS
EAN 8396620078874
Model no. 02-30M-112
for shaft
30 mm
Stern tube-Ø
38 - 41 mm
Length
17.5 cm
Hose connection
10.0 mm
Stock status
Only 1 in stock  
Price
Recommended retail price:
316,59 €
243,66 €
You save:
72,93 € (23%)
Excl. VAT, excl. shipping costs.
Quantity
Type
shaft seal PSS
EAN 8396620078942
Model no. 02-30M-134
for shaft
30 mm
Stern tube-Ø
45 - 48 mm
Length
17.1 cm
Hose connection
10.0 mm
Stock status
Only 5 in stock  
Price
Recommended retail price:
316,59 €
243,66 €
You save:
72,93 € (23%)
Excl. VAT, excl. shipping costs.
Quantity
Type
shaft seal PSS
EAN 8396620079000
Model no. 02-30M-200
for shaft
30 mm
Stern tube-Ø
50 - 54 mm
Length
17.5 cm
Hose connection
10.0 mm
Stock status
Only 5 in stock  
Price
Recommended retail price:
316,59 €
243,66 €
You save:
72,93 € (23%)
Excl. VAT, excl. shipping costs.
Quantity
Type
shaft seal PSS
EAN 8396620079246
Model no. 02-30M-214
for shaft
30 mm
Stern tube-Ø
57 - 60 mm
Length
17.1 cm
Hose connection
10.0 mm
Stock status
Only 4 in stock  
Price
Recommended retail price:
316,59 €
243,66 €
You save:
72,93 € (23%)
Excl. VAT, excl. shipping costs.
Quantity

Product details


1 2 3 4 5
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 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 are made from 316L stainless steel.

Carbon Stator

The high density, resin impregnated carbon/graphite stator is a space age composite that is first mixed, molded and then formed under pressure. 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 Type A Shaft Seal bellow is made from rubber (Nitrile), and has a temperature rating of -25°F to +225°F (-31°C to +107°C). Nitrile is known for its good resistance to weathering. Nitrile rubber's single most important property is its exceptional resistance to oils and non-polar solvents. It also offers good gas impermeability, abrasion resistance and better thermal stability than most general purpose elastomers

Hose barb

For high speed vessels it is required that a positive water supply be plumbed to the PSS Shaft Seal for the purpose of lubricating and cooling the seal faces. There are many sources of water supply, review the PSS Shaft Seal Installation Instructions for more information and note all plumbing must follow the standards and practices of proper boat plumbing. In most cases a slow speed boat 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 is close to the center line as possible to ensure the vent hose is never below the water line, even if the boat heels. Review the PSS Shaft Seal Installation Instructions for more details on venting the seal.


The PSS shaft seal is a mechanical face seal that is created between the flat surfaces of the rotating stainless steel rotor and the stationary carbon flange. The stationary carbon flange is attached to the vessels stern tube with hose clamps and the carbon flange is attached to the front side of the bellows with hose clamps. The stainless steel rotor is fit on the shaft in front of the carbon flange. The stainless steel rotor is used to compress the bellows before the collar is secured to the shaft with set-screws. This compression (pre-load) maintains contact between the faces and allows the PSS to compensate for the thrust from the propeller. The carbon flange is bored larger than the shaft diameter allowing it to “float” around the shaft and thus compensate for most misalignment and vibration problems. The stainless steel collar is sealed to the shaft by two o-rings that are recessed into the bore of the collar. These o-rings rotate with the shaft and stainless steel rotor and do not experience wear during operation.

Note: You must not use any grease on the seals. These mechanical seals are water lubricated.

Please specify the exact shaft diameter and stern tube outer-dia when ordering.

Documents

en-flag Manual
PDF, 1,34 MB
de-flag Manual
PDF, 523,69 KB
fr-flag Manual
PDF, 108,06 KB

What other SVB customers have to say

100% real reviews
Esko T.
Flag of Finlande 67152
Esko T.
Vannasputken kumi saa olla 2-3mm isompi jos ei löydy sopivaa klemmarit kiristää sen tiiviiksi,asennus video esim. youtub Pss Install video.
Reinhard W.
Flag of Allemagne Verified purchase 67151
Für bewegliches Stevenrohr
Is the only safe stern tube seal I know of with a flexible coupling
Reinhold H.
Flag of Allemagne Verified purchase 67151
Gute Stopfbuchse
So far everything works with the stuffing box - it is tight.
View all ratings

Rate product

How would you rate this product?
Disappointed
Completely fails to meet my expectations
Poor
Only some expectations are met
OK
Meets my basic expectations
Good
Slightly better than my general expectations
Excellent
Fully exceeds my expectations
Click on the stars to rate

Customers ask customers

Ask other SVB customers who have already purchased this product from us about their experience.

Your question will be automatically forwarded to other SVB customers and published on the product page. Please do not ask any questions which can only be answered by the SVB team – such as the status of an order or product availability. You are also more than welcome to contact our SVB team by email at: info@svb24.com or by phone on: +49 (0)421 57290510 .

Technical question

Question:
User image of Wojciech D.
Wojciech D. asked
on 8 juin 2022
Flag of English Hello Please let me know what is the lifetime of that sealing system, how often I have to change o rings. Which model is best if I use now rubber sealing 30mm shaft, 48 stern.
No answers yet. Be the first to answer this question!