Dripless vs Flax Stuffing Boxes - Page 2 - SailNet Community

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  #11  
Old 09-23-2009
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No, that's not far-fetched. I put a simple ABUS hose clamp between the coupler and the stuffing box on my Viking 33, plus a second one between the cutlass bearing and the hull. Shafts spinning out happen more often than people admit. My wife did a delivery in June where the shaft actually BROKE about an inch aft of the coupler...a clamp forward of the cutlass bearing kept it in the boat, and the water (mostly) out.

As they were offshore at the time, this was a good thing.
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Old 09-23-2009
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As far as burping the vent hose is a MUST as i know somebody who got air in theres form the divers air tanks when cleaning the bottom
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If a dirty bottom slows you down what do you think it does to your boat
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Old 09-26-2009
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A clarification - if the vent hose is open at the top as it should be, then burping is not needed. This is why PSS started using them for all their applications regardless of shaft speed. On our last boat, one without the vent hose, I would not allow a yard to launch our boat without me being present to make sure that the seal was burped. There were many other reasons why I wanted to be there at launching, but keeping my shaft from burning up was definitely one of them! I was very glad when I found out that PSS made the vent universal.
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Old 11-06-2009
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What is the best procedure for "Burping" a dripless system? The one on my Catalina 350 recently leaked and maybe that is the problem (gets cleaned by diver each month). Any other maintenance needed on them? Should the seal be fluched periodically?
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Old 11-06-2009
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What is the best procedure for "Burping" a dripless system? The one on my Catalina 350 recently leaked and maybe that is the problem (gets cleaned by diver each month). Any other maintenance needed on them? Should the seal be flushed periodically?
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Old 11-07-2009
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Flushing line

Mine is rigged with a "flushing" line that is teed into my raw water pump discharge. This is a common arrangement in industrial mechanical seal set-ups (lots of seawater pumps on ships are set up this way). The flushing water constantly cleans and lubricates the faces of the seal - never a problem with mine. Just be aware that this small (3/8"?) line will leak seawater back into the boat if disconnected!

***Also, PSS recommends renewal of the bellows every 6 years, no matter what it looks like. This is due to the characteristic of all elastomers (rubber or otherwise) to continue curing over time. Think about the nasty, cracked hose that you replaced in the engine room when you first bought the boat. . .

Seals are great if properly maintained (yeah, like everything else!) and they will not fret the shaft like packed stuffing boxes will - regardless of the type of packing. Shop before you buy - some of the well-advertized retailers charge a fair amount more for the PSS seals than what you will find them for elsewhere.
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