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Description
PSS Shaft Seal 1-¾" Shaft 2-½" TubePSS Shaft Seal 1 3 4" Shaft 2 1 2" Tube Shaft Diameter: 1 3 4" Stern Tube Diameter (D): 2 1 2" to 2 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
PSS Shaft Seal 1-3/4" Shaft 2-1/2" TubeShaft Diameter: 1-3/4"
Stern Tube Diameter (D): 2-1/2" to 2-5/8"
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 PSS Shaft Seal 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.
**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.
Manufacturer : PSS Shaft Seal
Manufacturer Part No : 02-134-212
UPC : 839662007290
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4.3 ★★★★★
Based on 1997 reviews
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Product Reviews
★★★★★ 5
Great reference for college US History I & Ii.
Format: Paperback
My college course references this book for US History I & Ii at Temple College in Texas.
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Reviewed in the United States on June 21, 2022
★★★★★ 4
A useful study
Format: Hardcover
This is a book that will make you angry. If you are a conservative, this book should make you feel very guilty. It is important to begin with that this book is a detour from Keyssar's larger project, which was supposed to be a history of the American working class' electoral participation. After struggling with the work for several years he realized that he needed to publish a whole book explaining what the right to vote actually was in American history. The result is a history of the slow and uneven path to universal suffrage in American history. We learn about the existence of the vote before 1776, the improvement that occured with the revolution, and the larger improvement that occured with the Jeffersonian/Jacksonian period in which the large majority of white men were able to vote. At the same time we learn of efforts to counter the expanding suffrage, such as disfranchisement of free blacks all over the country before 1861, attacks on the voting rights of paupers, felons, migrants and aliens, as well as the disfranchisment in the early 1800s of the limited voting rights women had in the early 1800s. Keyssar then goes on to discuss the narrowing of the portals from the 1860s to the 1920s, periods ironically bounded by giving the vote to blacks in the 1870s and to women by the 1920s. But in between that period nearly all blacks and many whites were disenfranchised in the south, while literacy, residence, nationality and registration systems sought to limit the vote in the North (while "asiatics" were barred in the west). The book concludes with the successful passage of the Voting Rights Act and the twenty-sixth amendment, but also with low turnout, an extremely narrow political spectrum, and government structures which limit political participation and reinforce conservative values.
Much of this will not be new to historians, though never before has there been such detail and the twenty appendixes provided at the back will be invaluable for future reference. Sometimes Keyssar gives a qualititative estimate of how many Americans could vote (he suggests that perhaps 60% of white Americans could vote before 1776, a figure much lower than the 80-90% posited by more Panglossian historians). And there are many interesting details, such as the New York plan where registration was supposed to take place on Yom Kippur, conventiently leaving out many Jews. But otherwise the full results have been reserved for his upcoming work. This weakens his criticisms of American exceptionalism, since without a clear understanding of how much the vote declined in the North, we cannot see how fully the ponderous elitism of Parkman and Godkin were like the undemocratic aspects of German or Italian or even British liberalism. I am also do not agree with his description of slaves as a "peasantry." This implies that the majority of white farmers who were not slaveholders were a) not peasants and b) were otherwise indistinguishable on a class basis from the slaveholders. Recent southern agrarian history makes this assumption quite questionable. It is true that Americans were unenthusiatic as Europeans about the rise of the proletariat and rural subaltern classes, but it is insufficient to say that mass suffrage only occured because such classes were a small proportion of the population. They were also a small proportion of the population in France in 1848 and 1851 when universal male suffrage was declared, which did not prevent a greater degree of struggle over the question in that country. Enfranchising the majority of any population would raise serious issues of class domination and control regardless of the class structure. Nevertheless this is still a useful study, and reading the petty, racist, misogynist, self-serving and self-satisfied arguments against the suffrage will be a depressing experience. To think that such injustices could be continued for two centuries thanks to the endless cant of "state's rights" long after the republican content of that slogan had drained away will infuriate you.
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Reviewed in the United States on October 18, 2000
★★★★★ 5
Unfolding of the right to vote in the U.S.
In my forty years of studying the history of the U.S., I find this work to be the most authoritative and complete work yet encountered. Not only is the book a thorough guide through the evolution of our democracy, it is an entertaining read. The book is a 'must' read for those who seek a perspective on many of the current issues involving voting rights.
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Reviewed in the United States on November 4, 2006
★★★★★ 5
Typical for a casebook.
Format: Hardcover
I had to buy this for school. It’s overpriced and horrible to read but great for what I needed it for.
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Reviewed in the United States on June 29, 2019
★★★★★ 5
Good seller
Format: Hardcover
book in condition provided in description
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Reviewed in the United States on April 7, 2021