{"product_id":"pss-shaft-seal-2-1-2-inch-shaft-for-4-inch-tube-marine-mechanical-seal-replacement","title":"PSS Shaft Seal 2-1\/2 inch Shaft for 4 inch Tube | Marine Mechanical Seal Replacement","description":"\u003cb\u003ePSS Shaft Seal 2-1\/2\" Shaft 4\" Tube\u003c\/b\u003e\u003cbr\u003e\u003cbr\u003e\u003cb\u003eShaft Diameter:\u003c\/b\u003e 2-1\/2\"\u003cbr\u003e\u003cb\u003eStern Tube Diameter (D):\u003c\/b\u003e 4\"\u003cbr\u003e\u003cb\u003eTotal Length (A):\u003c\/b\u003e 9.625\"\u003cbr\u003e\u003cb\u003eTotal Length (compressed) (Compressed A):\u003c\/b\u003e 8.375\"\u003cbr\u003e\u003cb\u003eRotor Diameter (B):\u003c\/b\u003e 4.2\"\u003cbr\u003e\u003cb\u003eCarbon Cuff Diameter (C):\u003c\/b\u003e 3.75\"\u003cbr\u003e\u003cb\u003eStern Cuff Length (E):\u003c\/b\u003e 2\"\u003cbr\u003e\u003cbr\u003e\u003cb\u003eThe PSS Shaft Seal\u003c\/b\u003e is the number one selling marine mechanical seal \u003cbr\u003eworldwide and is installed as standard equipment by many of the worlds most \u003cbr\u003ereputable boat builders \/ yards. The PSS Shaft Seal is also recognized as \u003cbr\u003ethe premiere retrofit (aftermarket) seal on the world market. Certified by \u003cbr\u003eBureau Veritas, ABS \u0026amp; Rina: Boat builders \/ yards recognize the advantages \u003cbr\u003eand value of installing the PSS as it eliminates the maintenance, constant \u003cbr\u003eadjustment \u0026amp; cost associated with traditional packing type glands. Aside \u003cbr\u003efrom these benefits, the PSS Shaft Seal helps to eliminate water in the \u003cbr\u003ebilge (100% water tight) \u0026amp; wear to the propeller shaft. The PSS Shaft Seal \u003cbr\u003ecan be easily retrofitted and is available for shafts ranging from 3\/4\" \u003cbr\u003e(20mm) to 6\" (150mm).\u003cbr\u003e\u003cbr\u003e\u003cb\u003eThe PSS Shaft Seal\u003c\/b\u003e is a mechanical face seal that is created between \u003cbr\u003ethe flat surfaces of the rotating stainless steel rotor and the stationary \u003cbr\u003ecarbon flange. 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. The stainless steel rotor is fit on the shaft \u003cbr\u003ein front of the carbon flange. The stainless steel rotor is used to compress the bellows before the collar is secured to the shaft with set-screws. This \u003cbr\u003ecompression (pre-load) maintains contact between the faces and allows the \u003cbr\u003ePSS to compensate for the thrust from the propeller. The carbon flange is \u003cbr\u003ebored larger than the shaft diameter allowing it to \"float\" around the shaft and thus compensate for most misalignment and vibration problems. The \u003cbr\u003estainless steel collar is sealed to the shaft by two o-rings that are \u003cbr\u003erecessed into the bore of the collar. These o-rings rotate with the shaft \u003cbr\u003eand stainless steel rotor and do not experience wear during operation.\u003cbr\u003e\u003cbr\u003e\u003cbr\u003e**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. \u003cbr\u003ePYI suggests as preventative maintenance that the PSS bellow be replaced in \u003cbr\u003esix year intervals. During bellows replacement it is recommended the o-rings \u0026amp; set screws in the stainless steel rotor also be replaced.\"\u003cbr\u003e\u003cbr\u003eBellows may need to be more frequently inspected in an environment where \u003cbr\u003enon-sealed batteries emit sulfuric acid. Sulfuric acid vapor will accelerate rubber deterioration, as will an ozonater.\u003cbr\u003e\u003cbr\u003eThe Maintenance Kit includes the items you need to properly maintain your \u003cbr\u003ePSS Shaft Seal. Included in the kit is one (1) PSS bellow, two (2) O-rings, \u003cbr\u003efive (5) set screws, four (4) new hose clamps and an allen key. \u003c!--- cis2:m2lsl5xp ---\u003e\n\u003cp\u003eThe PSS Shaft Seal Part Number 02-212-400 is a trusted, high-performance solution designed for marine applications requiring a reliable seal around a 2-1\/2 inch diameter shaft within a 4 inch stern tube. Renowned globally as the best-selling marine mechanical seal, the PSS Shaft Seal is widely installed by leading boat builders and yards due to its durability, ease of installation, and maintenance-free operation. Certified by Bureau Veritas, ABS, and Rina, this seal offers a significant upgrade over traditional packing glands by eliminating the need for constant adjustments, reducing maintenance costs, and preventing water intrusion into the bilge, thereby promoting safer and more efficient vessel operation. The PSS Shaft Seal’s innovative design ensures a 100% watertight environment, protecting your boat's integrity and prolonging the lifespan of your propeller shaft.\u003c\/p\u003e\u003cp\u003e\u003cb\u003eFeatures:\u003c\/b\u003e\u003c\/p\u003e\u003cul\u003e\u003cli\u003eDurable mechanical face design: Creates a reliable seal between rotating and stationary components\u003c\/li\u003e\u003c\/ul\u003e\u003cul\u003e\u003cli\u003ePre-loaded stainless steel rotor: Maintains constant contact and compensates for thrust and misalignment\u003c\/li\u003e\u003c\/ul\u003e\u003cul\u003e\u003cli\u003eFloating carbon flange: Accommodates shaft misalignment and reduces vibration impact\u003c\/li\u003e\u003c\/ul\u003e\u003cul\u003e\u003cli\u003eSealed with O-rings: Ensures smooth rotation without wear, maintaining long-term performance\u003c\/li\u003e\u003c\/ul\u003e\u003cul\u003e\u003cli\u003eEasy retrofit compatibility: Suitable for shafts from 3\/4 inch to 6 inches in diameter\u003c\/li\u003e\u003c\/ul\u003e\u003cul\u003e\u003cli\u003eCertified by major marine safety organizations: Ensures compliance and high-quality standards\u003c\/li\u003e\u003c\/ul\u003e\u003cul\u003e\u003cli\u003eComprehensive maintenance kit included: Facilitates regular inspection and replacement of key components for optimal performance\u003c\/li\u003e\u003c\/ul\u003e\u003cstyle\u003etable.productattributes, .productattributes td { border-bottom: 1px solid #ddd; border-collapse: collapse; padding: 2px; text-align: left; }\u003c\/style\u003e\n\u003ctable class=\"productattributes\"\u003e\n\u003cthead\u003e\u003ctr\u003e\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\u003ctd\u003eTruck Freight: No\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003eOversized: No\u003c\/td\u003e\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003cbr\u003e","brand":"PSS Shaft Seal","offers":[{"title":"Default Title","offer_id":44253597204569,"sku":"50874","price":718.4,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0623\/1818\/2489\/files\/50874XL.jpg?v=1785353395","url":"https:\/\/www.marinepartsonly.com\/products\/pss-shaft-seal-2-1-2-inch-shaft-for-4-inch-tube-marine-mechanical-seal-replacement","provider":"Marine Parts Only","version":"1.0","type":"link"}