Whether you have a pleasure craft, superyacht or larger vessel with a massive electronics system, you are aware of all the electricity your boat is emitting on a regular basis. If not efficiently controlled, this excess electricity can cause electrolysis damage and pitting to your rotors and sealing surfaces. That’s where the new PSS Ceramic Shaft Seal comes in.
PSS Shaft Seals are the #1 selling shaft seals worldwide – and for good reason. They’ve done it again with their new ceramic model.
Instead of having stainless steel against the carbon face, the PSS Ceramic Shaft Seal boasts a durable ceramic sleeve. Due to its inherent non-conductive nature, the ceramic sealing face eliminates the flow of the potential electric current, effectively removing the risk of damaging electrolysis to the sealing face and metal surfaces.
By insulating the rotor and sealing surfaces and protecting them from the harmful effects of excessive electricity, the PSS Ceramic Shaft Seal essentially eliminates the risk of pitting against the face of the seal. The electricity surplus will go somewhere else, preserving the seal and helping ensure its longevity.
To get the most out of this or whatever PSS shaft seal you select, be sure to check out the PSS Maintenance Kit and PSS O-Ring Kit to keep yours in good working order.
PSS SHAFT SEALS
The PSS Shaft Seal is the #1 selling marine mechanical seal worldwide and is installed as standard equipment by many of the world's most reputable boat builders and boatyards. The PSS Shaft Seal is also recognized as the premiere retrofit (aftermarket) seal on the world market. Boatbuilders and boat yards recognize the advantages and value of installing the PSS as it eliminates the maintenance, constant adjustment, and cost associated with a traditional type of packing glands. Aside from these benefits, the PSS Shaft Seal helps to eliminate water in the bilge (100% watertight) and wear to the propeller shaft. Any vessel can easily be retrofitted with a PSS Shaft Seal and is available for shafts ranging from 3/4” to 6-1/2” (20mm to 150mm).
HOW DOES IT WORK
The PSS 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 the front side of the bellows with hose clamps, and the back end of the bellows fits over the stern tube and is secured with hose clamps. The stainless-steel rotor is fitted on the shaft in front of the carbon flange. The stainless-steel rotor compresses the bellows before the rotor is secured to the shaft with set screws. This compression (pre-load) maintains constant contact between the two flat faces of the stainless-steel rotor and carbon flange, allowing the PSS to compensate for the variable fore and aft 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 problems. The stainless-steel rotor is sealed to the shaft by two O-rings recessed into the collar's bore. These O-rings rotate with the shaft and stainless-steel rotor and do not experience wear during operation.
Whatch some Videos about the PSS Shaft Seal