For those that think, 'wow, neat, gotta get one!'...heads-up, I just saw a 47-year old traditional shaft-seal / stuffing box (flax seal) that was STILL in operable shape on a sailboat with a 1-1/4" shaft...and had NEVER been serviced other than a new seal a couple of times! Yes, stuffing boxes 'drip water'...but are cheaply and easily fixed. A catastrophic bellows failure on a 'dripless seal' will sink your boat in an hour-or-two! Conventional stuffing boxes CANNOT 'catastrophically' fail...so a decent bilge pump in working conditions prevent OBVIOUS boat-loss. I wouldn't even CONSIDER this on a vessel less-than 60-ft and 450-hp, PERIOD! You've got a houseboat running twin 200-hp engines...stick with 'old school' and a redundant set of bilge pumps! If you do '20-year service' on those prop shafts, and polish them out (complete with buffing pads and jeweler's rouge), you'll have a VERY NICE (and relatively water-free) seal you don't really have to worry about.
So the fuck what? I feel like you are one of those who just say that about all new tech.... it is like just shut the fuck up already.... simple is NOT better...
Is there a way to get 0% leakage like with a magnetic system like those used in chemical plants where the propeller is put into motion by a magnetic system?
@@AutodidactEngineerI'd imagine most anything possible, but the problem is cost-and-energy-efficiency. I'd also imagine your usual v-seals and such would be more than suffficient in private use with no or zero to none leaks, when aligned and maintained properly.
Yea this product seems like an answer to a problem no one had. It has all the same issues of a stuffing box w requirement of high pressure water feed and shaft seals to prevent that high pressure water from blowing past your shaft and into the hull.
@@johnnyleonard4482 sorry for the late response. The "vent" application is more common on vessels that generally don't go faster than 10 knots. Vessels that come on plane (or semi-plane) should have some sort of forced water cooling so the seal doesn't become air bound.
It depends on the shaft diameter. Here's a link to the product page where you can see retail pricing and get more information. retmarine.com/shop/self-aligning-shaft-seals-sa-series/
Is this an improvement over the "Last Drop" system that came out about 20 years ago? Those seemed to work very well and gave long service and appears similar to your product.
These are heavy duty commercial grade propeller shaft seals. There are many commercial fishing boats here in Maine with well over 15,000 hours. We recommend inspecting and replacing the packing material yearly, the rubber hose should be changed out every 5-7 years.
Amazing invention! We still got a stuffing box and all associated fuckery u just added a higher pressure water feed? A feed that has to be sealed against a rotating shaft. Just like if u didnt have this bullshit at all.
We highly recommend it for our self-aligning shaft system. For lower speed, lower horsepower boats (less than 10 knots or so) you "might" get away with capping off the water feed. At a minimum you should have the water connection "vented" to the outside of the hull to ensure air doesn't get trapped inside the stuffing box (airbound). Thank you!
Exactly what I was looking for. Great animation. Thanks
I don't have a boat... do I still need one of these?
yes you do
This is exactly what I was looking for, nice video
What a beautiful animation
wow amazing shaft seal for small boat.
Great animation , thanks for sharing this video.
what prevents leaking when the boat is sitting at the pier?
For those that think, 'wow, neat, gotta get one!'...heads-up, I just saw a 47-year old traditional shaft-seal / stuffing box (flax seal) that was STILL in operable shape on a sailboat with a 1-1/4" shaft...and had NEVER been serviced other than a new seal a couple of times! Yes, stuffing boxes 'drip water'...but are cheaply and easily fixed. A catastrophic bellows failure on a 'dripless seal' will sink your boat in an hour-or-two! Conventional stuffing boxes CANNOT 'catastrophically' fail...so a decent bilge pump in working conditions prevent OBVIOUS boat-loss. I wouldn't even CONSIDER this on a vessel less-than 60-ft and 450-hp, PERIOD! You've got a houseboat running twin 200-hp engines...stick with 'old school' and a redundant set of bilge pumps! If you do '20-year service' on those prop shafts, and polish them out (complete with buffing pads and jeweler's rouge), you'll have a VERY NICE (and relatively water-free) seal you don't really have to worry about.
>I wouldn't even CONSIDER this on a vessel less-than 60-ft and 450-hp, PERIOD!
Bang on, this is something that larger vessels should be using.
So the fuck what? I feel like you are one of those who just say that about all new tech.... it is like just shut the fuck up already.... simple is NOT better...
Is there a way to get 0% leakage like with a magnetic system like those used in chemical plants where the propeller is put into motion by a magnetic system?
@@AutodidactEngineerI'd imagine most anything possible, but the problem is cost-and-energy-efficiency. I'd also imagine your usual v-seals and such would be more than suffficient in private use with no or zero to none leaks, when aligned and maintained properly.
Yea this product seems like an answer to a problem no one had. It has all the same issues of a stuffing box w requirement of high pressure water feed and shaft seals to prevent that high pressure water from blowing past your shaft and into the hull.
Thanks for the education
where does the water come from to cool the unit?
You can tap into the raw water pump, or the heat exchanger.
@@oilhand99 is this not use to vent as i've seen in other applications? Hence the line is place above the water line to drain over board?
@@johnnyleonard4482 sorry for the late response. The "vent" application is more common on vessels that generally don't go faster than 10 knots. Vessels that come on plane (or semi-plane) should have some sort of forced water cooling so the seal doesn't become air bound.
I think This shaft seal can joint in my ferry Stern tube.. how much per unit?
It depends on the shaft diameter. Here's a link to the product page where you can see retail pricing and get more information. retmarine.com/shop/self-aligning-shaft-seals-sa-series/
I need more details, if you don't mind
Where does the cooling water come from?
The cooling water is usually fed by taping into the heat exchanger and/or the boat's raw water pump.
Is this an improvement over the "Last Drop" system that came out about 20 years ago? Those seemed to work very well and gave long service and appears similar to your product.
How many hours would such a seal last
These are heavy duty commercial grade propeller shaft seals. There are many commercial fishing boats here in Maine with well over 15,000 hours. We recommend inspecting and replacing the packing material yearly, the rubber hose should be changed out every 5-7 years.
Nice
Kinetik enerji ilede çözülebilir kayıp olmaz saygılar ❤🇹🇷
Very nice animation video 👍 so good
I must admit.
I lie awake most nights worrying about my boat's drive shaft.
nice music, makes me wanna buy
But you're broke af
Nice 👍 video
МНЕ НУЖЕН ТОЛЬКО.РЕЗИНОВЫЙ ШЛАНГ.ВНУТРЕННИЙ ДИАМЕТР 60 ММ. -- НАРУЖНЫЙ 80--85 ММ.ДЛИНА 250 ММ.ВОЗМОЖНО ЛИ У ВАС КУПИТЬ ТАКОЙ ШЛАНГ.? СПАСИБО ЗА ОТВЕТ.
Tem representante no Brasil?
Awesome ❤️
Damm that looks nice. I just installed the other kind and no, I don't trust it.
good
This just looks like a traditional stuffing box that they added a hose barb to so you think it is something new.
Amazing invention! We still got a stuffing box and all associated fuckery u just added a higher pressure water feed? A feed that has to be sealed against a rotating shaft. Just like if u didnt have this bullshit at all.
Is the water fed part required?
We highly recommend it for our self-aligning shaft system. For lower speed, lower horsepower boats (less than 10 knots or so) you "might" get away with capping off the water feed. At a minimum you should have the water connection "vented" to the outside of the hull to ensure air doesn't get trapped inside the stuffing box (airbound). Thank you!
Look up blackjack
Kereeennnn👍👍👍🙏🙏
Change the packing yearly- forget it.
Bery
CLICKBAIT. This is an ad
没搞懂
正压让水往外流不是往里，但是机器停了水压没了靠啥密封。。
@@michaeltualatin 静态那个橡胶密封套就可以搞定，向外排水是为了动态密封，顺带还有冷却效果
Nah i trust my sump pumps
and whats inside in that invisible part?! and what for is that cable?! dislike from me.
What do you mean by invisible part?
Horrible background music
I thort Thumb-Nayle Waz bieng a
sUB-mARINÉS