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.
a 'stuffing box' is used to keep sea-water outside the main hull - essentially, a shaft protrudes through the hull, and the stuffing box inside the main hull, keeps sea-water from flooding the compartment/ship/hull... do you see, the amount of problems, this stupid (stuffing-box) design has? - the seals wear over time. they leak. and the friction costs energy...this idea has been around for ages... just think about government 'tax and spend' - and you get the presumption, that bad ideas can last a long, long time...anyhow. the solution is rather mundane...but it's the basic stuff, when applied makes all the difference in the world... you put a brush-less motor outside the main hull, and you afix a electrical cable through the main hull to supply it with current. all electricity has to be insulated, particularly the copper inside the coils. it's so silly...but, because people kinda of like being obstinate about it, they don't try...even though, it is so obvious (to me).
МНЕ НУЖЕН РЕЗИНОВЫЙ ШЛАНГ .ВНУТРЕННИЙ ДИАМЕТР 60 МИЛЛИМЕТРА.ТОЛЩИНА СТЕНКИ ШЛАНГА10-15 МИЛЛИМЕТРА.ДЛИНА ШЛАНГА 250 МИЛЛИМЕТРА ДЛЯ САЛЬНИКОВОЙ КОРОБКИ..КОТОРАЯ ОЧЕНЬ ПОХОЖА НА ВАШУ.У МЕНЯ ЕЩЁ МАСЛЕНКА. БЛАГОДАРЮ ЗА ПОМОЩЬ.
I, m a diver I cut out rope underneath the boat that do got this, very dangerous to work with and rope still get tangled around the drive shaft, one guy ruin is shaft the rope melt to a hard plastic that burn is shaft , it took me 2 thank s of air to clean the mess, it probably works but for the boats iv seen with this ,it only make thing worse , but i,m not saying it don't works ,sure it does but you still get rope.
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/
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.
The flare must be held down wind of you and in this case your CHILDREN. I don't replace flares I buy new ones and keep the recenty expired ones as back-up. Good to teach the kids but keep them out from down wind.
@@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.
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.
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.
