PRO Shaft Seal 3-1/2" Shaft & 5" Tube

The PSS PRO Shaft Seal is a mechanical face seal utilizing our proven stainless steel and carbon sealing components, but adds a reinforced silicone bellow, we include external rings standard on sizes +2-1/4" and optional on all smaller sizes, a secondary shaft retention collar, 316 Stainless Steel hose clamps (rolled edges & non-perforated) and an optional Nitronic 50 rotor upgrade (for highly corrosive environments). Designed specifically for applications that will require increased durability and resistance to harsh, corrosive, high pressure and otherwise demanding environments. The PSS PRO Shaft Seal is a specialized mechanical seal that is suitable for a variety of applications, with unmatched performance.

As with PSS Type A & B Seals, The PRO Shaft Seal is a mechanical face seal. The sealing surface is created between the flat surfaces of the rotating stainless-steel rotor and the stationary carbon flange. The stationary carbon flange is attached to a heavy duty silicone bellow which is attached to the vessel’s stern tube (shaft log), with 316SS hose clamps. The stainless-steel rotor is fitted on the shaft in front of the carbon flange and is used to compress the bellow , the rotor is then secured to the shaft with set-screws and the shaft retention collar is installed. This compression (pre-load) maintains constant contact between the two mating faces of the stainless-steel rotor and carbon flange, allowing the PSS to compensate for the variable axial movement due to propeller thrust. The carbon flange is over-bored to the shaft diameter allowing it to "float" around the shaft and thus compensate for most misalignment and vibration from the drive-line. The stainless-steel rotor is sealed to the shaft by two O-rings that are recessed into the bore of the rotor. These O-rings rotate with the shaft and the stainless-steel rotor, and therefore do not experience wear during operation.

Specifications:

  • Temperature Limits: -13°F to 425°F (-25°C to 220°C)
  • Pressure Limits: 40 PSI (2.75 BAR)
  • Shaft RPM Limits: 10,000 RPM
  • Carbon Graphite: Lapped to 4 HLB (0.000044" tolerance)
  • 316SS / Nitronic 50: Faced to 9 Ra
  • Bellow Material: Molded formed silicone / fabric

Product Dimensions:

  • Shaft Dia. (A) 3 1/2"
  • Stern Tube Dia. (B) 5" to 5-1/8"
  • Uncompressed Length (C) 10.538" 
  • Approx. Compressed Length 9.538" 
  • Rotor Diameter (D) 6"
  • Stern Cuff Length (E) 1.3"


American Sourced Marine Parts:  Please read this.....


The product on this page ships worldwide from the United States by Fedex or DHL.  Prices are AUD$. 
 
Express Delivery Service >30 kilos:
Included: Premium DHL or Fedex 4-7 day service.  Transit Insurance up to AUD$1000 value.  Customs clearance. 
GST is already pre-paid. Tracking of your parcel.  Choose Express Freight at checkout.

Not Included: Government tax of AUD$88 for orders over AUD$1000 
Freight Charges:  


The shipping weight kg of the item is shown 
under the Specifications tab.


The Express shopping cart default rate is AUD$85 for the first kilo.    Additional freight charges over one kilo 
and taxes will automatically and separately be billed to your credit card. You will receive a receipt for the freight.


The total AUD$ freight rates are:

0-1kg $85 (this is the default express freight charge)
>1-2kg $125
>2-3kg $145
>3-4kg $170
>5-6kg $195
>7kg-8kg $225
>8kg-9kg $250
10kg $275
20kg $400   Estimate only.


Some bulky items may be classified as oversize regardless of their weight and have a longer transit time.

The Fine Print:

We sell this part by the manufacturer's part number only.  These products are a special order from the USA
meaning there are no returns, no exchanges and no refunds possible.  The sale is final.

Prices include Australian GST, but may be subject to further customs fees or charges if the order is over AUD$1000.
Manufacturer's warranty applies.  The warranty is in the box.  If a product is dead on arrival, we will replace it. 
Where possible warranty DIY spare parts will be provided. 
Marine Direct Australia will contribute $50 towards your return freight charges to USA
within one year of order if there is a warranty issue.
 

Grey Marketing & Compliance: 

Where a brand has an established distributor in Australia, we will decline to sell it. 
Most such brands and products have been removed from our American listings.
Some items shown within this category are intended only for the American marketplace
and may not be compliant with Australian Standards and in which case we cannot sell them to you and/or will refund you.

 

(86673)

SKU 86673