Dripless shaft seals standard

The PYI PSS Shaft Seal Packless Sealing System is a dripless stuffing box and packing gland replacement for sailboat and power boat drivetrains.

The PYI dripless shaft seal is a mechanical seal that uses a self-aligning carbon-graphite stator to ensure a 100% watertight seal with proven reliability.

This packless seal will eliminate shaft wear and minimize corrosion.

The PSS Dripless Shaft Seal is the number one selling marine mechanical seal worldwide and is installed as standard equipment by many of the world’s most reputable boat builders & yards.

How Does The PSS Mechanical Shaft Seal Work?

A mechanical shaft seal is created by the contact of a turning surface against a stationary surface. In the case of the PSS Dripless Shaft Seal, the stationary surface is a carbon flange held in contact against a stainless steel rotor which turns with the shaft. The carbon flange is attached to the boat by a nitrile bellow which, with the help of water pressure, produces a constant contact between the carbon and the stainless steel ring. These type of seals are unaffected by engine motion or vibrations.

The result is a 100% watertight and totally maintenance-free dripless shaft seal.

Available for shafts from 3/4" to 3-3/4" (22mm to 95mm). Larger sizes available upon request. Please use our 'Product Inquiry' Form, or call 1-800-454-6960 for larger sizes.

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  1. List of Products
  
Order Qty.Model NumberShaft Size (in.)Stern Tube O.D. (in.)Compressed Length (in.)Weight (lbs.)Price

02034114 3/41-1/4 - 1-3/86-1/44.0 $270.00
$216.99

02034112 3/41-1/2 - 1-5/86-1/44.0 $270.00
$216.99

02034134 3/41-3/4 - 1-7/86-1/44.0 $270.00
$216.99

02034200 3/42 - 2-1/86-1/44.0 $270.00
$216.99

02034214 3/42-1/4 - 2-3/86-1/44.0 $270.00
$216.99

02034212 3/42-1/2 - 2-5/86-3/44.0 $290.00
$232.99

02078114 7/81-1/4 - 1-3/86-1/44.0 $270.00
$216.99

02078112 7/81-1/2 - 1-5/86-1/44.0 $270.00
$216.99

02078134 7/81-3/4 - 1-7/86-1/44.0 $270.00
$216.99

02078200 7/82 - 2-1/86-1/44.0 $270.00
$216.99

02078214 7/82-1/4 - 2-3/86-1/44.0 $270.00
$216.99

02078212 7/82-1/2 - 2-5/86-3/44.0 $290.00
$232.99

02100114 11-1/4 - 1-3/86-1/44.0 $280.00
$224.99

02100112 11-1/2 - 1-5/86-1/44.0 $280.00
$224.99

02100134 11-3/4 - 1-7/86-1/44.0 $280.00
$224.99

02100200 12 - 2-1/86-1/44.0 $280.00
$224.99

02100214 12-1/4 - 2-3/86-1/44.0 $280.00
$224.99

02100212 12-1/2 - 2-5/86-3/44.0 $310.00
$248.99

02118114 1-1/81-1/4 - 1-3/86-1/44.0 $280.00
$224.99

02118112 1-1/81-1/2 - 1-5/86-1/44.0 $280.00
$224.99

02118134 1-1/81-3/4 - 1-7/86-1/44.0 $280.00
$224.99

02118200 1-1/82 - 2-1/86-1/44.0 $280.00
$224.99

02118214 1-1/82-1/4 - 2-3/86-1/44.0 $280.00
$224.99

02118212 1-1/82-1/2 - 2-5/86-3/44.0 $310.00
$248.99

02114134 1-1/41-3/4 - 1-7/86-1/26.0 $320.00
$256.99

02114200 1-1/42 - 2-1/86-1/26.0 $320.00
$256.99

02114214 1-1/42-1/4 - 2-3/86-1/26.0 $320.00
$256.99

02114212 1-1/42-1/2 - 2-5/86-1/26.0 $320.00
$256.99

02114234 1-1/42-3/4 - 2-7/87-3/46.0 $350.00
$280.99

02114300 1-1/43 - 3-1/87-3/46.0 $350.00
$280.99

02114314 1-1/43-1/4 - 3-3/87-3/46.0 $350.00
$280.99

02114312 1-1/43-1/2 - 3-5/87-3/46.0 $350.00
$280.99

02138134 1-3/81-3/4 - 1-7/86-1/26.0 $320.00
$256.99

02138200 1-3/82 - 2-1/86-1/26.0 $320.00
$256.99

02138214 1-3/82-1/4 - 2-3/86-1/26.0 $320.00
$256.99

02138212 1-3/82-1/2 - 2-5/86-1/26.0 $320.00
$256.99

02138234 1-3/82-3/4 - 2-7/87-3/46.0 $350.00
$280.99

02138300 1-3/83 - 3-1/87-3/46.0 $350.00
$280.99

02138314 1-3/83-1/4 - 3-3/87-3/46.0 $350.00
$280.99

02138312 1-3/83-1/2 - 3-5/87-3/46.0 $350.00
$280.99

02112200 1-1/22 - 2-1/88-1/86.0 $425.00
$340.99

02112214 1-1/22-1/4 - 2-3/88-1/86.0 $425.00
$340.99

02112212 1-1/22-1/2 - 2-5/88-1/86.0 $425.00
$340.99

02112234 1-1/22-3/4 - 2-7/88-1/86.0 $425.00
$340.99

02112300 1-1/23 - 3-1/88-1/86.0 $425.00
$340.99

02112314 1-1/23-1/4 - 3-3/88-1/86.0 $425.00
$340.99

02112312 1-1/23-1/2 - 3-5/88-1/86.0 $425.00
$340.99

02112334 1-1/23-3/4 - 3-7/88-1/46.0 $500.00
$400.99

02112400 1-1/24 - 4-1/88-1/46.0 $500.00
$400.99

02134214 1-3/42-1/4 - 2-3/88-1/810.0 $465.00
$372.99

02134212 1-3/42-1/2 - 2-5/88-1/810.0 $465.00
$372.99

02134234 1-3/42-3/4 - 2-7/88-1/810.0 $465.00
$372.99

02134300 1-3/43 - 3-1/88-1/810.0 $465.00
$372.99

02134314 1-3/43-1/4 - 3-3/88-1/810.0 $465.00
$372.99

02134312 1-3/43-1/2 - 3-5/88-1/810.0 $465.00
$372.99

02134334 1-3/43-3/4 - 3-7/88-1/410.0 $550.00
$440.99

02134400 1-3/44 - 4-1/88-1/410.0 $550.00
$440.99

02200212 22-1/2 - 2-5/88-1/810.0 $550.00
$440.99

02200234 22-3/4 - 2-7/88-1/810.0 $550.00
$440.99

02200300 23 - 3-1/88-1/810.0 $550.00
$440.99

02200314 23-1/4 - 3-3/88-1/810.0 $550.00
$440.99

02200312 23-1/2 - 3-5/88-1/810.0 $550.00
$440.99

02200334 23-3/4 - 3-7/88-1/410.0 $620.00
$496.99

02200400 24 - 4-1/88-1/410.0 $620.00
$496.99

02214314 2-1/43-1/4 - 3-3/88-1/212.0 $620.00
$496.99

02214312 2-1/43-1/2 - 3-5/88-1/212.0 $620.00
$496.99

02214334 2-1/43-3/4 - 3-7/88-1/212.0 $620.00
$496.99

02214400 2-1/44 - 4-1/88-1/212.0 $620.00
$496.99

02214414 2-1/44-1/4 - 4-3/89-1/812.0 $705.00
$564.99

02214412 2-1/44-1/2 - 4-5/89-1/812.0 $705.00
$564.99

02214434 2-1/44-3/4 - 4-7/89-1/812.0 $705.00
$564.99

02214500 2-1/45 - 5-1/89-1/812.0 $705.00
$564.99

02212314 2-1/23-1/4 - 3-3/88-1/212.0 $620.00
$496.99

02212312 2-1/23-1/2 - 3-5/88-1/212.0 $620.00
$496.99

02212334 2-1/23-3/4 - 3-7/88-1/212.0 $620.00
$496.99

02212400 2-1/24 - 4-1/88-1/212.0 $620.00
$496.99

02212414 2-1/24-1/4 - 4-3/89-1/812.0 $705.00
$564.99

02212412 2-1/24-1/2 - 4-5/89-1/812.0 $705.00
$564.99

02212434 2-1/24-3/4 - 4-7/89-1/812.0 $705.00
$564.99

02212500 2-1/25 - 5-1/89-1/812.0 $705.00
$564.99

02234400 2-3/44 - 4-1/89-1/414.0 $790.00
$632.99

02234414 2-3/44-1/4 - 4-3/89-1/414.0 $790.00
$632.99

02234412 2-3/44-1/2 - 4-5/89-1/414.0 $790.00
$632.99

02234434 2-3/44-3/4 - 4-7/89-1/414.0 $790.00
$632.99

02234500 2-3/45 - 5-1/89-1/414.0 $790.00
$632.99

02234514 2-3/45-1/49-5/814.0 $1,005.00
$804.99

02234512 2-3/45-1/29-5/814.0 $1,005.00
$804.99

02234534 2-3/45-3/49-5/814.0 $1,005.00
$804.99

02234600 2-3/469-5/814.0 $1,005.00
$804.99

02300400 34 - 4-1/89-1/414.0 $890.00
$712.99

02300414 34-1/4 - 4-3/89-1/414.0 $890.00
$712.99

02300412 34-1/2 - 4-5/89-1/414.0 $890.00
$712.99

02300434 34-3/4 - 4-7/89-1/414.0 $890.00
$712.99

02300500 35 - 5-1/89-1/414.0 $890.00
$712.99

02300514 35-1/49-5/814.0 $1,120.00
$896.99

02300512 35-1/29-5/814.0 $1,120.00
$896.99

02300534 35-3/49-5/814.0 $1,120.00
$896.99

02300600 369-5/814.0 $1,120.00
$896.99

02314412 3-1/44-1/2 - 4-5/89-3/416.0 $1,540.00
$1,232.99

02314434 3-1/44-3/4 - 4-7/89-3/416.0 $1,540.00
$1,232.99

02314500 3-1/45 - 5-1/89-3/416.0 $1,540.00
$1,232.99

02314514 3-1/45-1/49-3/416.0 $1,540.00
$1,232.99

02314512 3-1/45-1/29-3/416.0 $1,540.00
$1,232.99

02314534 3-1/45-3/49-3/416.0 $1,540.00
$1,232.99

02314600 3-1/469-3/416.0 $1,540.00
$1,232.99

02312412 3-1/24-1/2 - 4-5/89-3/416.0 $1,540.00
$1,232.99

02312434 3-1/24-3/4 - 4-7/89-3/416.0 $1,540.00
$1,232.99

02312500 3-1/25 - 5-1/89-3/416.0 $1,540.00
$1,232.99

02312514 3-1/25-1/49-3/416.0 $1,540.00
$1,232.99

02312512 3-1/25-1/29-3/416.0 $1,540.00
$1,232.99

02312534 3-1/25-3/49-3/416.0 $1,540.00
$1,232.99

02312600 3-1/269-3/416.0 $1,540.00
$1,232.99

02334412 3-3/44-1/2 - 4-5/89-3/420.0 $1,700.00
$1,360.99

02334434 3-3/44-3/4 - 4-7/89-3/420.0 $1,700.00
$1,360.99

02334500 3-3/45 - 5-1/89-3/420.0 $1,700.00
$1,360.99

02334514 3-3/45-1/49-3/420.0 $1,700.00
$1,360.99

02334512 3-3/45-1/29-3/420.0 $1,700.00
$1,360.99

02334534 3-3/45-3/49-3/420.0 $1,700.00
$1,360.99

02334600 3-3/469-3/420.0 $1,700.00
$1,360.99
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5 stars - based on 2 customer reviews
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Most Helpful Customer Reviews

Top notch shaft seals, Jun 25 2013 12:03PM
By: KappaSquid
PYI dripless shaft seals are the best marine shaft seals out there. Have used them for over a decade, and they continue to impress. Kudos to PYI and Deep Blue Yacht Supply
 
PYI PSS Dripless shaft seals, Jul 24 2013 8:37PM
By: TKEWarrior
PYI dripless shaft seals are the best marine shaft seals out there. Really nice fit, and easy to install. Deep Blue had the best price I could find online or brick and mortar
 

The PYI PSS Shaft Seal Packless Sealing System is a dripless stuffing box and packing gland replacement for sailboat and power boat drivetrains.

The PYI dripless shaft seal is a mechanical seal that uses a self-aligning carbon-graphite stator to ensure a 100% watertight seal with proven reliability.

This packless seal will eliminate shaft wear and minimize corrosion.

The PSS Dripless Shaft Seal is the number one selling marine mechanical seal worldwide and is installed as standard equipment by many of the world’s most reputable boat builders & yards.

How Does The PSS Mechanical Shaft Seal Work?

A mechanical shaft seal is created by the contact of a turning surface against a stationary surface. In the case of the PSS Dripless Shaft Seal, the stationary surface is a carbon flange held in contact against a stainless steel rotor which turns with the shaft. The carbon flange is attached to the boat by a nitrile bellow which, with the help of water pressure, produces a constant contact between the carbon and the stainless steel ring. These type of seals are unaffected by engine motion or vibrations.

The result is a 100% watertight and totally maintenance-free dripless shaft seal.

Available for shafts from 3/4" to 3-3/4" (22mm to 95mm). Larger sizes available upon request. Please use our 'Product Inquiry' Form, or call 1-800-454-6960 for larger sizes.

PSS Shaft Seals: Advantages

Among marine shaft seals, no other type sells better across the world than PSS shaft seals.  These marine mechanical seals are even included by default by many of the world’s finest boatyards, whose expert craftsmen consider them to be standard equipment.  PSS stands for “Packless Sealing System,” which is an excellent description of the technology that makes these seals so exceptional.  These marine shaft seals function without as much constant attention as other kinds of sealing systems.  In particular, PSS marine shaft seals do not need to be adjusted often and they free boating enthusiasts from the need for frequent maintenance.

In addition, a PSS Shaft Seal is completely watertight, which means that water will not accumulate in the bilge.  This feature also helps to cut down on wear and tear to the shaft of the propeller so that boating enthusiasts can enjoy a trouble-free watercraft experience for a long while to come.

PSS Shaft Seals are simple to install, even in retrofit situations, and can fit shafts as small as ¾ inch and as large as six full inches or 150 mm across.  In essence, the PSS marine shaft seal consists of a face seal between the two flat surfaces provided by a carbon flange, which remains stationary, and a rotor, which rotates.  The shaft seal serves to compensate as the propeller produces thrust.  This helps to eliminate not just problems caused by vibration, but also those that are a result of small misalignments.  A key part of these seals is the use of O-rings that rotate along with the shaft so that they will not wear down over time.

Parts of a Marine Shaft Seal: The Flange

Boating enthusiasts with more than a casual understanding of their boats and motors know that marine shaft seals play an essential role in helping a propeller do its job to full capacity. PSS shaft seals are comprised of several components that require engineering to exacting specifications so that the system works as intended.

The Flange

High quality marine shaft seals feature a flange made of carbon fabricated to have a high density. Some PSS shaft seals are advertised as having flanges made of “graphite” instead, but this term simply refers to a particular crystalline structure of the element carbon. When installed, the face of this carbon or graphite flange will rub against the rotor face of the shaft seal when the propeller is first switched on. This is by design, not coincidence; the rubbing action guarantees that a flawless seal will be established.

This aspect of the flange explains why “high density” carbon is so important. The rubbing action will quickly wear away or damage the flange itself if it is made of material that is not extremely hard and durable. Flanges made of high-density carbon or graphite have excellent wear resistance and can perform their duties for a long time. In addition, the carbon helps to prevent overheating incidents inside the shaft seal, as carbon can withstand temperatures as high as 400 degree Fahrenheit. When flanges are made of cheaper materials, such as synthesized plastics and their derivatives, overheating can become a real concern.

Marine shaft seals

Ocean going craft are designed to resist sea water. The engines are not always designed to keep the corrosive substance out. This may seem strange to the boat owner, but there is a good reason why the manufacturers let the damaging substance into the confines of the engine.  The design lets the user cool the engine without the cooling systems people use in their cars. The boat manufacturers give the user a choice between destruction by over heating or a destruction that is slower but is just as sure. Boat owners can overcome this problem by using a PSS Dripless seal. The seals are used in many different types of private and commercial craft. Many different commercial operations have come to use it in their operations.

Boating enthusiasts need to protect their investment. Engines can be replaced, but they are one of the more expensive parts of any water craft. The owner can spend a few minutes with the sealer if he wants to keep salt water out of the boat. The sealer prevents the water from entering. Most boats are rated for one drip per minute. Although the heat of the engine prevents water from reaching the sensitive areas, the salt and other chemicals remain. A customer uses this unit can protect the shafts of most boats. He needs to be careful not to go over 150 millimeters.

The reader already knows the benefits of the seal. He may wonder how and where he needs to install the item.  A boat owner with a small amount of mechanical skill places it between the steel rotor and the carbon flange. The product is designed to keep the motion of the rotor from harming the flange. The reader may wonder how he can keep his engine cool. PSS dripless seals are designed to use the pneumatic expansion of air to keep the temperature of the engine down. If the user wants to extend the life of his engine, he can add a steal collar in addition to the seal. The watertight seal also causes the motor to undergo less stress in operation. This extends the life of the engine.

Boat owners need to replace their engines periodically.  People can reduce the time between engine replacements by installing the PSS dripless marine shaft seal. There are many types of marine shaft seals. The owner needs to make sure he does not waste his money.

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