PSS Type A "Low Speed" Shaft Seal for 1" Shaft and 1 3/4" Stern Tube

PSS Type A "Low Speed" Shaft Seal

The PSS Type A "Low Speed" 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.

Key Features

• Superior Alternative to Traditional Seals: The PSS Type A Shaft Seal is an ideal replacement for packing glands and lip seals, offering a modern and superior solution.
• Durable Materials: Crafted from high-quality and durable materials, this shaft seal is designed to withstand harsh marine environments, providing long-lasting performance and minimizing the need for frequent replacements.
• Easy Installation: With a user-friendly design, the PSS Type A Shaft Seal facilitates easy installation.
• Low Maintenance Operation: Enjoy peace of mind with the PSS Type A 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 Compatibility: Designed to fit a variety of shaft sizes and boat types, this shaft seal offers versatile compatibility. Whether you have a sailboat or a motor yacht, the PSS Type A Shaft Seal provides a reliable solution.