SKU:86667
PRO Shaft Seal 2" Shaft 3" Tube
The PSS PRO Shaft Seal is a mechanical face seal utilizing our proven stainless steel and carbon sealing components but adds reinforced silicone bellows, a secondary shaft retention collar, 316 Stainless Steel hose clamps (rolled edges and 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 suitable for various 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 bellows attached to the vessels 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 bellows, 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. In addition, 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 recessed into the rotor's bore. These O-rings rotate with the shaft and the stainless-steel rotor and therefore do not experience wear during operation.
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The PSS Shaft Seal PRO model is engineered for demanding marine and industrial applications requiring high durability and resistance to harsh environments. Featuring a mechanical face seal design, it utilizes proven stainless steel and carbon sealing components combined with reinforced silicone bellows, a secondary shaft retention collar, and high-quality 316 stainless steel hose clamps with rolled edges for secure installation. An optional Nitronic 50 rotor upgrade enhances corrosion resistance, making this seal ideal for highly corrosive or high-pressure settings. The design ensures a reliable seal between the rotating shaft and stationary components, accommodating axial movement caused by propeller thrust while maintaining consistent contact between the sealing faces. The carbon flange is over-bored to allow slight floating around the shaft, which helps compensate for misalignment and vibration, promoting a longer lifespan and reducing maintenance needs. The rotor is fitted with two recessed O-rings that rotate with the shaft, preventing wear and ensuring a tight seal during operation. The PRO Shaft Seal delivers exceptional performance across a broad temperature range from -13°F to 425°F and up to 40 PSI pressure, withstanding shaft speeds up to 10,000 RPM. Built with high-precision materials such as molded silicone bellows, carbon graphite, and stainless steel facings, it offers reliable sealing in marine and industrial environments. Its compact design fits shafts with a diameter of 2 inches and stern tubes measuring 3 to 3-1/8 inches, with a compressed length of approximately 8.27 inches. This versatile seal provides a robust solution for applications demanding durability, corrosion resistance, and high-performance sealing capabilities, ensuring smooth operation and extended service life in challenging conditions.
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