just installed a pss dry shaft and the vent line is just looking tru the floor, what did you do with your vent line? did you cut your floor? can i turn the vent 90 degrees?
pss dry shaft and vent line on H 41?
- Thread starter Valerio
- Start date
Picture would be worth a 1000 words. Our PSS dripless vent I ran into the engine bay and then up above the water line and the turned it downward. I terminated the line into a small plastic bottle, the only time you may get water out of the vent is when in reverse, when a dripless packing is mounted on a powerboat that is not a vent line, its actually a seal cooling line, as our shafts don't turn faster than 3500 RPM the port becomes a burp/vent line.
Understood, but, occassionally when the shaft if rotating in reverse particularly on initial change in direction (such as backing into the slip) the vent port of the seal will burp water a line fastened to that running above the water line and into a catch pan will help ensure the area stays nice and dry.
I had significant amounts of water shooting up the vent port into the engine compartment every time we used a reverse thrust. After much research and consulting with PSS we learned that it’s a common occurrence on some boats that when you use reverse the bellows can slightly compress causing water to shoot up the vent. The solution was to raise the vent far up the hull and add a through hull for it. No more wet engine compartment, engine or engine bilge.
I also have water shoot up the vent line when put in reverse and I have the vent line high and still
have water shoot out and so added a bicycle bottle that the vent goes into the bottle 90% fitting.
Nick
have water shoot out and so added a bicycle bottle that the vent goes into the bottle 90% fitting.
Nick
I made a couple of vent line overflow valves using water heater pressure relief valves, one brass and one plastic. After trying them I did not like the over flow that still managed to get in the shaft or engine space. So, I put a loop in the vent line and a plug in the end so water can't flow out the vent line. I check it occasionally to ensure there is water in the line and may even pull the plug in the vent line once in a while to ensure it is has water in it. Has worked for me for years. I like dry bilges. Might have something to do with being a former submariner keeping water out of the people tank.
My LasDrop says below 10 kts the barb should be used as a vent so as not to trap air against the seal surface. Didn't PSS do away with the barb and end up bringing it back?
BUT i have to make a hole in the floor because the vent line is almost touching the board, how did you manage that ?
I talked with PYI techs directly and I purged mine continuously and the best for longevity of your seal interface. [just like power boats]
i bought the Bronze hose adapter from PYI. [not brass in my picture label]
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Here is what @Maine Sail uses as an alternative to my continuous purge.
Picture and Quote from him...
"I use hydronic heating system vents, the one below made by Taco and called the Hy-Vent series.. They have proven 100% trouble free for over 12 years now. Never lets in a single drop of water and always keeps the air out of the PSS. I have also use a bike water bottle, as a capture point, but it eventually needs to be emptied they Hy-Vent never does and is fully automatic..."
Jim...
PS: This info was from this link...
Water in Engine
i bought the Bronze hose adapter from PYI. [not brass in my picture label]
_____
Here is what @Maine Sail uses as an alternative to my continuous purge.
Picture and Quote from him...
"I use hydronic heating system vents, the one below made by Taco and called the Hy-Vent series.. They have proven 100% trouble free for over 12 years now. Never lets in a single drop of water and always keeps the air out of the PSS. I have also use a bike water bottle, as a capture point, but it eventually needs to be emptied they Hy-Vent never does and is fully automatic..."
Jim...
PS: This info was from this link...
Water in Engine
The Engine Water pump discharge. Shown in picture. Same place used for Power Boats.
Even though Sailboats do not need a continuous purge because of Lower Shaft RPM, There is still friction heat on the Carbon Seal/Stainless interface. Thus mine is continuously purged with cooling water.
PSS is a "Single Mechanical Seal" and same type as LasDrop that @Justin_NSA uses. Note that these type seals are the only type shaft seals that DO NOT wear your shafts. All others compress packing etc, to your shaft thus causing shaft wear.
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Even @Maine Sail vent is above that Engines water High Point Vent.
Noted in my picture is my High Point Vent.
That is spot is key to prevent potential siphons from your Engine water pump when shutting down your engine.
Jim...
My vent hose is directed forward 3 feet too the engine compartment then turns up behind a dresser 5 feet. The hose end isn't terminated and open to the air.
Please note where @Maine Sail placed his vent, in my post #13 and #15 above.
Jim...
PS: You can still donate to @Maine Sail for all of his help. See Pinned Info at top of this page.