{"title":"PSS Shaft Seal","description":"\u003cp\u003ePSS Shaft Seals for Leak-Free Performance You Can Rely On\u003c\/p\u003e\n\u003cp\u003eWhen you’re out on the water, the last thing you want to worry about is water intrusion in your boat’s drive system. Leaks can lead to serious trouble, from engine failure to costly repairs. That’s where PSS Shaft Seals come in, designed to keep water where it belongs—outside your boat. These seals are engineered for long-lasting performance and reliability, making them a preferred choice for boaters serious about maintaining their vessels.\u003c\/p\u003e\n\u003cp\u003eAt Bottom Line Discount Marine, we carry PSS Shaft Seals because they’re built to withstand the harsh marine environment while delivering a secure and efficient seal that protects your boat’s drivetrain from water damage.\u003c\/p\u003e\n\u003ch3\u003ePSS Shaft Seals: Essential Protection for Your Drive System\u003c\/h3\u003e\n\u003cp\u003ePSS Shaft Seals are designed to provide a leak-free seal for various shaft sizes, ensuring that your drive system remains protected during operation. Constructed with durable materials that resist wear and tear, these seals are perfect for both recreational and commercial applications. With models available for shafts ranging from 1-1\/4” to 2-1\/2”, you can find the right fit for your setup, giving you peace of mind on every voyage.\u003c\/p\u003e\n\u003ch3\u003ePSS Shaft Seal PRO: Advanced Solutions for Marine Reliability\u003c\/h3\u003e\n\u003cp\u003eThe PSS Shaft Seal PRO line takes sealing technology to the next level. These seals are designed for more demanding applications, featuring enhanced materials and designs that provide an even tighter seal. Whether you’re navigating rough waters or docking in a busy marina, the PRO series ensures that your drive system stays dry and secure, allowing you to focus on enjoying your time on the water.\u003c\/p\u003e\n\u003ch3\u003ePSS Silicone Shaft Seals: Flexible Performance for Unique Applications\u003c\/h3\u003e\n\u003cp\u003eFor those special setups or unique installations, PSS also offers Silicone Shaft Seals that combine flexibility with durability. These seals are designed for a variety of shaft sizes and are perfect for applications where traditional seals might struggle. They provide a reliable barrier against water intrusion, making them ideal for custom builds or retrofits where standard solutions won't fit.\u003c\/p\u003e\n\u003ch3\u003eWhy Buy PSS Shaft Seals from Bottom Line Discount Marine\u003c\/h3\u003e\n\u003cp\u003eAuthorized PSS dealer. We offer a comprehensive selection of PSS Shaft Seals and marine hardware at competitive prices, along with free shipping. Our team is here to assist you in selecting the right seal for your boat, ensuring you have everything you need for a successful installation and dependable performance on the water.\u003c\/p\u003e","products":[{"product_id":"pss-silicone-shaft-seal-2-shaft-amp-2-3-4-tube","title":"PSS Silicone Shaft Seal 2\" Shaft \u0026 2-3\/4\" Tube - 03-200-234","description":"\u003cp\u003e\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eSilicone Shaft Seal 2\" Shaft \u0026amp; 2-3\/4\" Tube\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eThe PSS PRO Shaft Seal is a mechanical face seal utilizing PSS's proven stainless steel and carbon sealing components, with a few additions. These additions include adding reinforced silicone bellows, 316 stainless steel hose clamps (rolled edges and non-perforated), and an optional Nitronic 50 rotor upgrade (for highly corrosive environments).\u003c\/p\u003e\u003cp\u003eDesigned specifically for applications that will require increased durability and resistance to harsh, corrosive, high-pressure, and otherwise demanding environments, the PSS PRO Shaft Seal is a specialized mechanical seal that is suitable for a variety of applications and has unmatched performance.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eFeatures:\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cbr\u003e\u003cli\u003e2 in. shaft diameter \u003c\/li\u003e\n\u003cbr\u003e\u003cli\u003e2-3\/4 in. to 2-7\/8 in. stern tube diameter\u003c\/li\u003e\n\u003cbr\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCertifications:\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cbr\u003e\u003cli\u003eABS Certified\u003c\/li\u003e\n\u003cbr\u003e\u003cli\u003eRINA Certified\u003c\/li\u003e\n\u003cbr\u003e\u003cli\u003eBureau Veritas Certified\u003c\/li\u003e\n\u003cbr\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eHow Does it Work?\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eTwo nitrile o-rings seal the stainless steel rotor to the shaft and will not experience wear.\u003c\/p\u003e\u003cp\u003eThe Shaft Retention Collar is attached to the shaft and helps retain the propeller or rudder shaft in a vessel in the event of catastrophic failure of the coupling or if the shaft comes free from the coupling.\u003c\/p\u003e\u003cp\u003eA seal is created between the two mating faces of the carbon stator and the stainless steel rotor.\u003c\/p\u003e\u003cp\u003eA seal is created between the two mating faces of the carbon stator and the stainless steel rotor.\u003c\/p\u003e\u003cp\u003eRaw water is fed to the PSS Shaft Seal for cooling \/ lubricating the seal faces on high speed vessels.\u003c\/p\u003e\u003cp\u003eHose clamp tail protection, Clamp Jackets.\u003c\/p\u003e\u003cp\u003eThe stationary carbon stator is attached to the bellows, which is secured to the stern tube (shaft log).\u003c\/p\u003e\u003cp\u003e316SS hose clamps with rolled edges and a non-perforated band.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eShaft Retention Collar \u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eThe PYI Shaft Retention Collar is designed to help retain the propeller or rudder shaft in a vessel in the event of catastrophic failure of the coupling or if the shaft comes free from the coupling. The double split design provides maximum axial holding power with the benefit of quick and efficient assembly with the shaft installed. The design fully engages the shaft without marring. Easily installed where major disassembly would otherwise be required. Greater axial holding power than set screws or one-piece clamping collars. Effective on hard and soft shafts.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eRotor\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eThe PSS stainless steel rotor is slid down the shaft and secured to the shaft with set screws at 90° for maximum holding power. Precision tolerances are maintained by computer-controlled lathes. The faces have a number 9 micro finish and are perpendicular to the bore to prevent run-out as the collar rotates. The carbon graphite stator will polish the face of the rotor during the first few minutes of operation. The stainless steel rotor should not need to be replaced under normal operating conditions. The stainless steel rotor used on the PSS Type A Shaft Seal is made from 316L stainless steel.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eCarbon Stator\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eThe high-density resin-impregnated carbon\/graphite stator is a composite that is first mixed, molded, and then formed under pressure. The blanks are then baked, machined, and lapped. The face of our carbon is finished to a flatness of 4 helium light bands (measured .000044\" of variation over the entire lapped surface). The grade of carbon used in the PSS has an operating temperature of over 500° Fahrenheit (+260° Celsius) and cannot melt if the seal runs dry, unlike a rubber lip seal or plastic face seal. The high density of the carbon greatly increases its longevity and wear resistance. Several commercial vessels have recorded over 40,000 (over 4-1\/2 years of continuous operation) engine hours on the same, original components. The carbon should not need to be replaced under normal operating conditions.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eBellow\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eThe PSS PRO Shaft Seal bellow provides the best combination of durability, strength, and elasticity. It's constructed of four-ply aramid or silicone with a flurosilicone outer. This flurosilicone cover creates an oil- and fuel-resistant barrier, protecting the exterior surface from the possibility of damage from a splash or spill. Both ends of the bellow are sealed. The four-ply cloth inlay provides excellent strength and resistance to abrasion. This bellow has a continuous operating temperature range of -90°F to +425°F (-70°C to +220°C).\u003c\/p\u003e","brand":"PSS Shaft Seal","offers":[{"title":"Default Title","offer_id":48117946351924,"sku":"99775","price":499.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0742\/0575\/7748\/files\/99775XL-595632.jpg?v=1722191202"},{"product_id":"pss-shaft-seal-2-189-shaft-4-tube","title":"PSS Shaft Seal 2-½\" Shaft 4\" Tube - 50874","description":"\u003cp\u003e\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\/p\u003e","brand":"PSS Shaft Seal","offers":[{"title":"Default Title","offer_id":48117946384692,"sku":"50874","price":718.4,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0742\/0575\/7748\/files\/50874XL-255440.jpg?v=1722191197"},{"product_id":"pss-shaft-seal-1-189-shaft-2-189-tube","title":"PSS Shaft Seal 1-½\" Shaft 2-½\" Tube - 02-112-212","description":"\u003cp\u003e\u003cb\u003ePSS Shaft Seal 1-1\/2\" Shaft 2-1\/2\" Tube\u003c\/b\u003e\u003cbr\u003e\u003cbr\u003e\u003cb\u003eShaft Diameter:\u003c\/b\u003e 1-1\/2\"\u003cbr\u003e\u003cb\u003eStern Tube Diameter (D):\u003c\/b\u003e 2-1\/2\" to 2-5\/8\"\u003cbr\u003e\u003cb\u003eTotal Length (A):\u003c\/b\u003e 9.175\"\u003cbr\u003e\u003cb\u003eTotal Length (compressed) (Compressed A):\u003c\/b\u003e 8.175\"\u003cbr\u003e\u003cb\u003eRotor Diameter (B):\u003c\/b\u003e 3.75\"\u003cbr\u003e\u003cb\u003eCarbon Cuff Diameter (C):\u003c\/b\u003e 3.25\"\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 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 \u0026amp; Rina: Boat builders \/ yards recognize the advantages and value of installing the PSS as it eliminates the maintenance, constant adjustment \u0026amp; 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) \u0026amp; 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).\u003cbr\u003e\u003cbr\u003e\u003cb\u003eThe PSS Shaft Seal\u003c\/b\u003e is a mechanical face seal that 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 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 in 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 compression (pre-load) maintains contact between the faces and allows the PSS to compensate for the thrust from the propeller. The carbon flange is bored larger than the shaft diameter allowing it to \"float\" around the shaft and thus compensate for most misalignment and vibration problems. The stainless steel collar is sealed to the shaft by two o-rings that are recessed into the bore of the collar. These o-rings rotate with the shaft and 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. PYI suggests as preventative maintenance that the PSS bellow be replaced in six 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 non-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 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. \u003c\/p\u003e","brand":"PSS Shaft Seal","offers":[{"title":"Default Title","offer_id":48117946417460,"sku":"50850","price":490.4,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0742\/0575\/7748\/files\/50850XL-943160.jpg?v=1722191196"},{"product_id":"pss-shaft-seal-1-189-shaft-2-188-tube","title":"PSS Shaft Seal 1-½\" Shaft 2-¼\" Tube - 02-112-214","description":"\u003cp\u003e\u003cb\u003ePSS Shaft Seal 1-1\/2\" Shaft 2-1\/4\" Tube\u003c\/b\u003e\u003cbr\u003e\u003cbr\u003e\u003cb\u003eShaft Diameter:\u003c\/b\u003e 1-1\/2\"\u003cbr\u003e\u003cb\u003eStern Tube Diameter (D):\u003c\/b\u003e 2-1\/4\" to 2-3\/8\"\u003cbr\u003e\u003cb\u003eTotal Length (A):\u003c\/b\u003e 9.175\"\u003cbr\u003e\u003cb\u003eTotal Length (compressed) (Compressed A):\u003c\/b\u003e 8.175\"\u003cbr\u003e\u003cb\u003eRotor Diameter (B):\u003c\/b\u003e 3.75\"\u003cbr\u003e\u003cb\u003eCarbon Cuff Diameter (C):\u003c\/b\u003e 3.25\"\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 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 \u0026amp; Rina: Boat builders \/ yards recognize the advantages and value of installing the PSS as it eliminates the maintenance, constant adjustment \u0026amp; 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) \u0026amp; 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).\u003cbr\u003e\u003cbr\u003e\u003cb\u003eThe PSS Shaft Seal\u003c\/b\u003e is a mechanical face seal that 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 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 in 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 compression (pre-load) maintains contact between the faces and allows the PSS to compensate for the thrust from the propeller. The carbon flange is bored larger than the shaft diameter allowing it to \"float\" around the shaft and thus compensate for most misalignment and vibration problems. The stainless steel collar is sealed to the shaft by two o-rings that are recessed into the bore of the collar. These o-rings rotate with the shaft and 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. PYI suggests as preventative maintenance that the PSS bellow be replaced in six 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 non-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 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. \u003c\/p\u003e","brand":"PSS Shaft Seal","offers":[{"title":"Default Title","offer_id":48117946646836,"sku":"50849","price":490.4,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0742\/0575\/7748\/files\/50849XL-317159.jpg?v=1722191196"},{"product_id":"pss-pro-shaft-seal-1-1-4-shaft-2-tube","title":"PSS PRO Shaft Seal 1-1\/4\" Shaft \u0026 2\" Tube - 03-114-200","description":"\u003cp\u003e\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003ePRO Shaft Seal 1-1\/4\" Shaft \u0026amp; 2\" Tube\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eThe PSS PRO Shaft Seal is a mechanical face seal utilizing our proven stainless steel and carbon sealing components but adds reinforced silicone bellows, a secondary shaft retention collar, 316 Stainless Steel hose clamps (rolled edges and non-perforated), and an optional Nitronic 50 rotor upgrade (for highly corrosive environments). Designed specifically for applications that will require increased durability and resistance to harsh, corrosive, high pressure, and otherwise demanding environments. The PSS PRO Shaft Seal is a specialized mechanical seal suitable for various applications, with unmatched performance.\u003cbr\u003e\u003cbr\u003eAs with PSS Type A \u0026amp; B Seals, The PRO 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 a heavy-duty silicone bellows attached to the vessel’s stern tube (shaft log), with 316SS hose clamps. The stainless-steel rotor is fitted on the shaft in front of the carbon flange and is used to compress the bellows, the rotor is then secured to the shaft with set screws, and the shaft retention collar is installed. This compression (pre-load) maintains constant contact between the two mating faces of the stainless-steel rotor and carbon flange, allowing the PSS to compensate for the variable axial 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 from the drive-line. The stainless-steel rotor is sealed to the shaft by two O-rings recessed into the rotor's bore. These O-rings rotate with the shaft and the stainless-steel rotor and therefore do not experience wear during operation.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eSpecifications:\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cbr\u003e\u003cli\u003eTemperature Limits: -13°F to 425°F (-25°C to 220°C)\u003c\/li\u003e\n\u003cbr\u003e\u003cli\u003ePressure Limits: 40 PSI (2.75 BAR)\u003c\/li\u003e\n\u003cbr\u003e\u003cli\u003eShaft RPM Limits: 10,000 RPM\u003c\/li\u003e\n\u003cbr\u003e\u003cli\u003eCarbon Graphite: Lapped to 4 HLB (0.000044\" tolerance)\u003c\/li\u003e\n\u003cbr\u003e\u003cli\u003e316SS \/ Nitronic 50: Faced to 9 Ra\u003c\/li\u003e\n\u003cbr\u003e\u003cli\u003eBellow Material: Molded formed silicone \/ fabric\u003c\/li\u003e\n\u003cbr\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eProduct Dimensions:\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cbr\u003e\u003cli\u003eShaft Dia. (A) 1-1\/4\"\u003c\/li\u003e\n\u003cbr\u003e\u003cli\u003eStern Tube Dia. (B) 2\" to 2-1\/8\"\u003c\/li\u003e\n\u003cbr\u003e\u003cli\u003eUncompressed Length (C) 8.805\" \u003c\/li\u003e\n\u003cbr\u003e\u003cli\u003eApprox. Compressed Length 8.055\" \u003c\/li\u003e\n\u003cbr\u003e\u003cli\u003eRotor Diameter (D) 2.875\"\u003c\/li\u003e\n\u003cbr\u003e\u003cli\u003eStern Cuff Length (E) 1.3\"\u003c\/li\u003e\n\u003cbr\u003e\n\u003c\/ul\u003e","brand":"PSS Shaft Seal","offers":[{"title":"Default Title","offer_id":48211452133684,"sku":"86659","price":421.6,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0742\/0575\/7748\/files\/86659XL.jpg?v=1725963744"},{"product_id":"pss-shaft-seal-pro-2-3-4-shaft-4-tube-part-number-03-234-400","title":"PSS Shaft Seal PRO 2-3\/4\" Shaft \u0026 4\" Tube - Part Number 03-234-400","description":"\u003cp\u003e\u003cstrong\u003ePRO Shaft Seal 2-3\/4\" Shaft \u0026amp; 4\" Tube\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eThe PSS PRO Shaft Seal is a mechanical face seal utilizing PSS Shaft Seal's proven stainless steel and carbon sealing components but adding reinforced silicone bellows, a secondary shaft retention collar, 316 stainless steel hose clamps (rolled edges and non-perforated), and an optional Nitronic 50 rotor upgrade (for highly corrosive environments). Designed specifically for applications that will require increased durability and resistance to harsh, corrosive, high-pressure, and otherwise demanding environments, the PSS PRO Shaft Seal is a specialized mechanical seal suitable for various applications with unmatched performance.\u003c\/p\u003e\u003cp\u003eAs with PSS Type A \u0026amp; B Seals, the PRO 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 a heavy-duty silicone bellows attached to the vessel’s stern tube (shaft log) with 316SS hose clamps. The stainless-steel rotor is fitted on the shaft in front of the carbon flange and is used to compress the bellows. The rotor is then secured to the shaft with set screws, and the shaft retention collar is installed. This compression (pre-load) maintains constant contact between the two mating faces of the stainless-steel rotor and carbon flange, allowing the PSS to compensate for the variable axial 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 from the drive line. The stainless-steel rotor is sealed to the shaft by two O-rings recessed into the rotor's bore. These O-rings rotate with the shaft and the stainless-steel rotor and therefore do not experience wear during operation.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eComponents:\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eShaft Retention Collar\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eThe PYI Shaft Retention Collar is designed to help retain the propeller or rudder shaft in a vessel in the event of catastrophic failure of the coupling or if the shaft comes free from the coupling. The double-split design provides maximum axial holding power with quick and efficient assembly with the shaft installed. The design fully engages the shaft without marring. Easily installed where major disassembly would otherwise be required. Greater axial holding power than set screws or one-piece clamping collars. Effective on hard and soft shafts.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eRotor\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eThe rotor on the PRO seal is manufactured out of 316L stainless steel and machined to a 9–12Ra finish on precision CNC lathes. It is secured on the shaft using 2 pairs of set screws positioned at a 90-degree angle; in addition, a locking collar is placed in front of the rotor and further retains the propeller or rudder shaft in case of catastrophic failure of the coupling or if the shaft comes free from the coupling. As on the Type A seal, the stainless steel rotor further polishes the carbon stator during the initial hours of operation.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eCarbon Stator\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eThe high-density resin-impregnated carbon stator is manufactured from an advanced composite that is first mixed, molded, and then formed under pressure. The blank parts are then baked, machined, and lapped to a measured flatness of 4 helium light bands (measured at 0.000044\" of variation over its entire lapped surface). The grade of carbon composite used in the PSS Shaft Seal has a maximum operating temperature of 500 °F (+260 °C) and cannot melt if the seal runs dry for a short period, unlike a lip seal or a plastic face seal. In addition, the high density of the carbon greatly increases longevity and wear resistance. Several commercial vessels have recorded over 40,000 (over 4-1\/2 years of continuous operation) engine hours on the same original components.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eBellows\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eThe bellows on both the PRO and Type B PSS seals are constructed out of high-temperature silicone laminated with either 4 or 5 plies of polyester fabric (aramid in larger sizes) and covered with a layer of fluorosilicone. In addition, both ends of the bellows are sealed so no water can get into the polyester\/Aramid fabric. The 4 or 5 fabric inlay provides excellent strength to abrasion and resistance to pressure without loading the silicone. On the larger models, the strength is greatly increased by using stainless steel hoops laid into the convolutions of the bellows.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHose Barb\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eFor high-speed vessels (planning hulls or vessels powering over 12 knots), it is required that a positive water supply be plumbed to the PSS Shaft Seal for lubricating and cooling the seal faces. There are many water supply sources; review the PSS Shaft Seal Installation Instructions for more information and note that all plumbing must follow the standards and practices of proper boat plumbing. In most cases, a slow-speed boat with no bearing in the shaft log does not require positive water feed and can be \"vented.\" Ideally, the vent line will be run at least 2-3 feet above the waterline and as close to the centerline as possible to ensure the vent hose is never below the water line, even if the boat heels. Again, review the PSS Shaft Seal Installation Instructions for more details on venting the seal.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eSpecifications:\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cbr\u003e\u003cli\u003eTemperature Limits: -13°F to 425°F (-25°C to 220°C)\u003c\/li\u003e\n\u003cbr\u003e\u003cli\u003ePressure Limits: 40 PSI (2.75 BAR)\u003c\/li\u003e\n\u003cbr\u003e\u003cli\u003eShaft RPM Limits: 10,000 RPM\u003c\/li\u003e\n\u003cbr\u003e\u003cli\u003eCarbon Graphite: Lapped to 4 HLB (0.000044\" tolerance)\u003c\/li\u003e\n\u003cbr\u003e\u003cli\u003e316SS \/ Nitronic 50: Faced to 9 Ra\u003c\/li\u003e\n\u003cbr\u003e\u003cli\u003eBellow Material: Molded formed silicone\/fabric\u003c\/li\u003e\n\u003cbr\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eProduct Dimensions:\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cbr\u003e\u003cli\u003eShaft Diameter: 2-3\/4\"\u003c\/li\u003e\n\u003cbr\u003e\u003cli\u003eStern Tube Diameter: 4\" to 4-1\/8\"\u003c\/li\u003e\n\u003cbr\u003e\u003cli\u003eUncompressed Length: 9.988\"\u003c\/li\u003e\n\u003cbr\u003e\u003cli\u003eApprox. Compressed Length: 8.988\"\u003c\/li\u003e\n\u003cbr\u003e\u003cli\u003eRotor Diameter: 5\"\u003c\/li\u003e\n\u003cbr\u003e\u003cli\u003eStern Cuff Length: 1.3\"\u003c\/li\u003e\n\u003cbr\u003e\n\u003c\/ul\u003e \n\u003cbr\u003eEnsure optimal performance and durability with the PSS Shaft Seal PRO, specifically designed for a 2-3\/4\" shaft and 4\" tube. This innovative mechanical face seal from PSS Shaft Seal incorporates high-quality stainless steel and carbon components, reinforced silicone bellows, and a secondary shaft retention collar, making it ideal for demanding environments. The PSS Shaft Seal PRO excels in providing reliable sealing under harsh conditions, ensuring longevity and reducing maintenance needs for your vessel's propulsion system.\n\n\u003cp\u003e\u003cb\u003eFeatures:\u003c\/b\u003e\n\u003cbr\u003e* Material: Constructed with stainless steel and carbon for superior corrosion resistance.\n\u003cbr\u003e* Bellows: Features reinforced silicone bellows for enhanced flexibility and durability.\n\u003cbr\u003e* Retention Collar: Comes with a secondary shaft retention collar to maintain integrity in case of coupling failure.\n\u003cbr\u003e* Hose Clamps: Equipped with 316 stainless steel hose clamps to secure connections without marring.\n\u003cbr\u003e* Temperature Range: Operates effectively from -13?F to 425?F, accommodating various marine conditions.\n\u003cbr\u003e* Pressure Limits: Designed to withstand pressures up to 40 PSI for reliable performance.\n\u003cbr\u003e* RPM Limits: Suitable for shaft speeds of up to 10,000 RPM to meet high-performance demands.\n\u003cbr\u003e* Carbon Stator: High-density, resin-impregnated carbon stator ensures longevity and wear resistance.\u003c\/p\u003e","brand":"PSS Shaft Seal","offers":[{"title":"Default Title","offer_id":48388275994932,"sku":"104281","price":1084.8,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0742\/0575\/7748\/files\/104281XL.jpg?v=1734099895"},{"product_id":"pss-shaft-seal-for-2-inch-shaft-with-3-1-4-inch-tube-model-02-200-314","title":"PSS Shaft Seal for 2-Inch Shaft with 3-1\/4 Inch Tube - Model 02-200-314","description":"\u003cp\u003e\u003cb\u003ePSS Shaft Seal 2\" Shaft 3-1\/4\" Tube\u003c\/b\u003e\u003cbr\u003e\u003cbr\u003e\u003cb\u003eShaft Diameter:\u003c\/b\u003e 2\"\u003cbr\u003e\u003cb\u003eStern Tube Diameter (D):\u003c\/b\u003e 3-1\/4\" to 3-3\/8\"\u003cbr\u003e\u003cb\u003eTotal Length (A):\u003c\/b\u003e 9.175\"\u003cbr\u003e\u003cb\u003eTotal Length (compressed) (Compressed A):\u003c\/b\u003e 8.175\"\u003cbr\u003e\u003cb\u003eRotor Diameter (B):\u003c\/b\u003e 3.75\"\u003cbr\u003e\u003cb\u003eCarbon Cuff Diameter (C):\u003c\/b\u003e 3.25\"\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. \n\u003cbr\u003eThe PSS Shaft Seal is a top-rated marine mechanical seal designed for reliable shaft protection and leak prevention. It is widely used by leading boat builders and marine yards worldwide, recognized for its durability and ease of retrofit installation. This seal eliminates water ingress into the bilge and reduces wear on the propeller shaft, offering a maintenance-free alternative to traditional packing glands. Certified by Bureau Veritas, ABS, and Rina, the PSS Shaft Seal ensures high standards of safety and performance for vessels with shafts ranging from 3\/4 inch to 6 inches in diameter.\u003cbr\u003e\u003cbr\u003eThe PSS Seal features a precision mechanical face seal created between a stainless steel rotor and a stationary carbon flange. The stationary flange is attached to the stern tube with hose clamps, while the stainless steel rotor fits onto the shaft in front of the flange. This design allows for easy installation and efficient operation, with the pre-load compression maintaining contact between sealing faces and compensating for propeller thrust. The carbon flange is designed to 'float' around the shaft, accommodating misalignments and vibrations, while the stainless steel collar, sealed with O-rings, rotates with the shaft to prevent wear and ensure a tight seal.\u003cbr\u003e\u003cbr\u003eRegular inspection of the bellows is critical, especially in environments with sulfuric acid vapor or ozone exposure, which can accelerate rubber deterioration. PYI recommends replacing the bellows every six years as part of preventative maintenance. The included maintenance kit provides essential components such as a new bellows, O-rings, set screws, hose clamps, and an Allen key for straightforward servicing. Proper maintenance ensures continued leak-free operation and extends the life of the seal, making it a cost-effective choice for boat owners and operators.\u003cbr\u003e\u003cbr\u003eDesigned for easy retrofit installation, the PSS Shaft Seal is an ideal upgrade for traditional gland seals, providing a 100% watertight solution. Its robust construction and certified standards make it suitable for a wide range of marine applications, delivering dependable performance and peace of mind during operation.\u003c\/p\u003e\n\n\u003cp\u003e\u003cb\u003eFeatures:\u003c\/b\u003e\n\u003cbr\u003e* Shaft Diameter: 2 inches for secure fit on standard marine shafts\n\u003cbr\u003e* Tube Diameter: 3-1\/4 inches to 3-3\/8 inches for versatile stern tube compatibility\n\u003cbr\u003e* Total Length: 9.175 inches with a compressed length of 8.175 inches for easy installation\n\u003cbr\u003e* Rotor Diameter: 3.75 inches to ensure proper sealing contact\n\u003cbr\u003e* Carbon Cuff Diameter: 3.25 inches for effective sealing around the shaft\n\u003cbr\u003e* Certified Performance: Recognized by Bureau Veritas, ABS, and Rina for marine safety standards\n\u003cbr\u003e* Easy Retrofits: Suitable for shafts from 3\/4 inch to 6 inches, facilitating straightforward upgrades\n\u003cbr\u003e* Durable Construction: Mechanical face seal designed for long-term operation with minimal maintenance\n\u003cbr\u003e* Maintenance Kit Included: Contains bellows, O-rings, set screws, hose clamps, and an Allen key for servicing\n\u003cbr\u003e* Regular Inspection Recommended: Bellows should be checked periodically, with a suggested replacement interval of six years\u003c\/p\u003e","brand":"PSS Shaft Seal","offers":[{"title":"Default Title","offer_id":48869298438452,"sku":"50862","price":630.4,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0742\/0575\/7748\/files\/50862XL.jpg?v=1755685912"}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0742\/0575\/7748\/collections\/pss-shaft-seal.png?v=1775072285","url":"https:\/\/bldmarine.com\/collections\/pss-shaft-seal.oembed","provider":"BLDMarine","version":"1.0","type":"link"}