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Introducing the PSS Shaft Seal for 85mm Shafts and 4 1/2in Tub

The PSS Shaft Seal is a top-selling marine mechanical seal designed for 85mm shafts and 4 1/2in tubs, making it an ideal choice for various boat applications. This premium seal is renowned for its reliability and efficiency, and it is installed as standard equipment by many reputable boat builders and yards worldwide. The PSS Shaft Seal stands out for its ability to eliminate maintenance, constant adjustments, and associated costs typically found with traditional packing type glands. Its innovative design ensures a 100% watertight seal, protecting your vessel from water in the bilge and wear on the propeller shaft.

Key Product Properties and Specifications

The PSS Shaft Seal is a mechanical face seal that utilizes a flat surface rotating stainless steel rotor and a stationary carbon flange. This advanced design allows for easy retrofitting and is available for shaft sizes ranging from 3/4" (20mm) to 6" (150mm). The carbon flange is attached to the vessel's stern tube with hose clamps, while the stainless steel rotor is fitted on the shaft in front of the carbon flange. The seal is secured to the shaft with set-screws, ensuring a tight fit. The carbon flange is bored larger than the shaft diameter, allowing it to compensate for misalignment and vibration issues. This feature, combined with the stainless steel collar sealed by two o-rings, ensures a long-lasting and durable seal that rotates with the shaft without experiencing wear.

Practical Uses and Benefits

The PSS Shaft Seal is not just a mechanical component; it is a vital component for the health and performance of your boat. By eliminating water in the bilge and wear on the propeller shaft, this seal helps maintain the integrity of your vessel. Its maintenance-free design saves you time and money, allowing you to focus on other aspects of boat ownership. Whether you are a professional boat builder, a marine engineer, or a recreational boater, the PSS Shaft Seal is an essential tool for ensuring your boat operates smoothly and efficiently. Its worldwide recognition and certification by Bureau Veritas, ABS, and Rina further solidify its position as the premier retrofit (aftermarket) seal on the market.