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High-Performance PSS Shaft Seal for 40mm Shafts

The PYI - PSS Shaft Seal #02-40M-212 is a top-selling marine mechanical seal designed for 40mm shaft sizes and 2 1/2in tub diameters. This premium seal is widely recognized as the leading choice among boat builders and yards worldwide. Its reputation is built on its ability to eliminate maintenance, constant adjustment, and costs associated with traditional packing type glands. The PSS Shaft Seal is not just a mechanical marvel; it's a testament to engineering excellence and reliability.

Technical Specifications and Features

The PSS Shaft Seal is a mechanical face seal crafted between the flat surfaces of a rotating stainless steel rotor and a stationary carbon flange. This design ensures a 100% watertight seal, protecting your vessel from water damage in the bilge. The carbon flange is attached to the stern tube and the bellows with hose clamps, while the stainless steel rotor is secured on the shaft. This setup allows for compression of the bellows, maintaining contact between the faces and compensating for thrust from the propeller. The carbon flange is bored larger than the shaft diameter, enabling it to "float" and compensate for misalignment and vibration issues. The stainless steel collar is sealed to the shaft with two o-rings, ensuring a seamless operation without wear.

Practical Applications and Benefits

The PSS Shaft Seal is an essential component for boats seeking optimal performance and reliability. Its easy retrofit capability makes it a perfect solution for vessels with shaft sizes ranging from 3/4" (20mm) to 6" (150mm). By eliminating water in the bilge and wear to the propeller shaft, the PSS Shaft Seal extends the life of your boat and ensures a smooth, trouble-free operation. This product is ideal for both new installations and retrofits, making it a versatile choice for boat owners and professionals alike.