PSS Shaft Seal 1-3/4" Shaft 3-1/2 Tube. Shaft Diameter: 1-3/4". Stern Tube Diameter (D): 3-1/2 to 3-5/8. Total Length (A): 9.175". Total Length (compressed) (Compressed A): 8.175". Rotor Diameter (B): 3.75". Carbon Cuff Diameter (C): 3.25". Stern Cuff Length (E): 2" The PSS Shaft Seal is the number one selling marine mechanical seal. worldwide and is installed as standard equipment by many of the worlds most. reputable boat builders / yards. The PSS Shaft Seal is also recognized as. the premiere retrofit (aftermarket) seal on the world market. Certified by. Bureau Veritas, ABS & Rina: Boat builders / yards recognize the advantages. and value of installing the PSS as it eliminates the maintenance, constant. adjustment & cost associated with traditional packing type glands. Aside. from these benefits, the PSS Shaft Seal helps to eliminate water in the. bilge (100% water tight) & wear to the propeller shaft. The PSS Shaft Seal. can be easily retrofitted and is available for shafts ranging from 3/4". (20mm) to 6" (150mm). The stationary carbon flange is attached to the vessels stern tube with hose clamps and the carbon flange is attached to the front side of the bellows with hose clamps. As with any rubber hose below waterline, the PSS bellows must be inspected on a regular basis for any sign of wear, aging or chemical deterioration. PYI suggests as preventative maintenance that the PSS bellow be replaced in. six year intervals. During bellows replacement it is recommended the o-rings & set screws in the stainless steel rotor also be replaced.". Bellows may need to be more frequently inspected in an environment where. non-sealed batteries emit sulfuric acid. Sulfuric acid vapor will accelerate rubber deterioration, as will an ozonater. The Maintenance Kit includes the items you need to properly maintain your. PSS Shaft Seal. Included in the kit is one (1) PSS bellow, two (2) O-rings,. five (5) set screws, four (4) new hose clamps and an allen key.
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