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pcs.
€583.99 This is a NET-price excluding German VAT. Shipments to countries outside of the EU may be subject to import duties and taxes.
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Available variants:
Image of Shaft Seal for 38mm Shaft

PSS Shaft Seal for 38mm Shaft

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.

Image of Shaft Seal for 32mm Shaft

PSS Shaft Seal for 32mm Shaft

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.

Image of Shaft Seal for 45mm Shaft

PSS Shaft Seal for 45mm Shaft

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.

Image of Shaft Seal for 35mm Shaft

PSS Shaft Seal for 35mm Shaft

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.

Image of Shaft Seal for 25mm Shaft

PSS Shaft Seal for 25mm Shaft

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.

Image of Shaft Seal for 40mm Shaft

PSS Shaft Seal for 40mm Shaft

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.

Image of Shaft Seal for 30mm Shaft

PSS Shaft Seal for 30mm Shaft

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.

Item no.
67170
EAN
8396620083960
Model no.
02-50M-314
Description
PSS shaft seal
For shaft
50 mm
For stern tube-Ø
83 - 86 mm
Length
23.4 cm
Hose connection
10 mm
Water-cooled
Yes
Self-venting
Yes
Floating ring seal
Yes
Maintenance free
Yes
Grease lubricated
No

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).




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 blanks are then baked, machined and lapped. The face of our carbon is finished to a flatness of 4 helium light bands (measured .000044" of variation over entire lapped surface). 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 when ordering the exact shaft diameter and stern tube outer-dia.

Documents

en-flag Manual
PDF, 1,34 MB
de-flag Manual
PDF, 523,69 KB
fr-flag Manual
PDF, 107,53 KB

What other SVB customers have to say

100% real reviews

4 customer reviews

4.8 (out of 4 ratings)
3 Stars
(0)
2 Stars
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1 Stars
(0)
Mikko L.
by Mikko L. Flag of Finland 4/25/2013
Das is die Besten aus State of the Art wellendictungs.
Anonymous
by Anonymous 2/16/2013
sehr Gut
Jens K.
by Jens K. Flag of Germany 12/5/2012
The installation is relatively simple according to the instructions. It is difficult to find the bias to be generated. This depends on how well you can work alongside the wave. In theory on the workbench, of course, everything is simple. But I had no problems. How well the seal works, unfortunately, I can only judge in the coming season. Greetings, Jens
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Item no.
67170
67162
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Description
PSS shaft seal
PSS Wellenabdichtung
For stern tube-Ø
83 - 86 mm
64 - 67 mm
For shaft
50 mm
38 mm
Length
23.4 cm
22.9 cm
Availability / Price
Only 2 in stock
only €583 99
Buy now
Only 3 in stock
only €449 54
Buy now

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 .

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Technical question

Question:
User image of Anatoly S.
Anatoly S. asked
on Jul 14, 2019
Flag of English Hi. I'm working on design of the drive and I'm considering these PSS. We have a 35 mm shaft which needs sealing. Can you provide me with drawings or any other technical info? I can't find anything on this page. Also I want to ask you if these sealing assemblies can work on the other side of the shaft. When the water comes outside into stern tube.
Answer:
User image of Manfred T.
Manfred T. answered
on Jul 15, 2019
Hallo The Shaft seal works like that. The ring is mounted small bolt on the Shaft and the adjustment of the ring have to make to give a little pressure to the rubber. The rubber works like a spring. I think the seal works from both side because only the rubber press the seal to the ring so both side are sealed