PSS PRO Shaft Seals

PYI PSS PRO Shaft Seal

The PSS PRO Shaft Seal is a mechanical face seal utilizing our proven stainless steel and carbon sealing components but adds a 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. 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 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 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.

Features:

• Cutting-Edge Sealing Technology: The PSS PRO Shaft Seal incorporates state-of-the-art sealing technology, providing an advanced and efficient seal around the shaft. It surpasses traditional sealing methods, making it an exceptional choice
• High-Performance Materials: Crafted from premium and durable materials, the PSS PRO Shaft Seal uses a silicone bellow compared to the nitrile bellow found on the PSS Type A Shaft Seal. This shaft seal is engineered to withstand challenging marine environments
• Easy Installation: Designed with user-friendly features, the PSS PRO Shaft Seal facilitates easy installation
• Low Maintenance Operation: Enjoy peace of mind with the PSS PRO Shaft Seal's low-maintenance operation. Eliminate the need for regular greasing or adjustments, reducing downtime and ensuring your vessel stays on the water without unnecessary interruptions
• Versatile and Compatible Design: Tailored to accommodate various shaft sizes and boat types, the PSS PRO Shaft Seal offers versatile compatibility. Whether you own a sailboat or a motor yacht, this shaft seal provides a dependable solution for achieving a watertight seal

How it works:

• 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 mating faces of the carbon stator and the stainless steel rotor
• Raw water is fed to the PSS Shaft Seal for cooling / lubricating the seal faces on high speed vessels
• The stationary carbon stator is attached to the bellow, which is secured to the stern tube (shaft log)
• The Shaft Retention Collar is attached to the shaft and helps retain the propeller or rudder shaft in your vessel in the event of catastrophic failure of the coupling or if the shaft comes free from the coupling
• Stainless steel rings are fit to the bellow for increased strength, support and durability. External rings come standard on sizes 2-1/4" (60mm) to 3-3/4" (95mm) and optional for smaller sizes
• 316SS hose clamps with rolled edges and non-perforated band
• Hose clamp tail protection, clamp jackets