Re: [PSUBS-MAILIST] enquiry - Propulsion

["Dan H." <JMachine@adelphia.net>]

Steve,

Sorry I took so long but I kept forgetting to check the supplier when I was
at my shop.  This is the web site for the company I purchased my shaft seals
from. http://www.ussealmfg.com/

Some of their seals are not too high priced and others are surprisingly
pricey.  I explained my application to their staff and I purchased the seal
they recommended.  I believe it was about $35 US.  There are other suppliers
for this type of face seal but these folks were helpful and they had what I
needed.

Good luck, Dan H.

----- Original Message -----
From: "Dan H." <JMachine@adelphia.net>
To: <personal_submersibles@psubs.org>
Sent: Friday, September 19, 2003 8:49 AM
Subject: Re: [PSUBS-MAILIST] enquiry - Propulsion


> I don't have the supplier at my finger tips but will get it for you.  When
I
> was talking to their factory engineer he told me that the way they work
is,
> that they do actually get hot on their contact surfaces, although not
really
> detectable to the observer.  The contact surfaces are precision finished
and
> must be free from the slightest bit of oil.  The few molecules of water
that
> try to get in-between the two rotating surfaces is actually evaporated off
> by the friction of the seal.
>
> Kittredge subs used them in all their thrusters and had never had a
problem.
> Their a common rotary pump seal but a bit pricey.
>
> Dan H.
> ----- Original Message -----
> From: "steve" <steve@kobol.worldonline.co.uk>
> To: <personal_submersibles@psubs.org>
> Sent: Thursday, September 18, 2003 3:39 PM
> Subject: Re: [PSUBS-MAILIST] enquiry - Propulsion
>
>
> > Hi Dan
> >
> > i haven't tried carbon ceramic seals, my experimental thruster uses a
> viton
> > rotary shaft seal.
> > i started with a nitrile seal but even at low revs i found the friction
> > started to melt the seal, the viton seal is harder wearing but i find
that
> > the shaft movement and the pressure lets some water in so i was looking
at
> > other ideas.
> >
> > Do you know of a supplier where i could get these seals from.
> >
> >
> > Steve Bosworth
> > UK
> >
> >
> > ----- Original Message -----
> > From: "Dan H." <JMachine@adelphia.net>
> > To: <personal_submersibles@psubs.org>
> > Sent: Thursday, September 18, 2003 12:43 PM
> > Subject: Re: [PSUBS-MAILIST] enquiry - Propulsion
> >
> >
> > > Steve,
> > >
> > > Have you tried carbon ceramic face seals that are used in rotary water
> > > pumps.  They have a spring loaded carbon face that mates to a
stationary
> > > ceramic face and will work well even under considerable pressure.
> > >
> > > Dan H.
> > >
> > > ----- Original Message -----
> > > From: "steve" <steve@kobol.worldonline.co.uk>
> > > To: <personal_submersibles@psubs.org>
> > > Sent: Wednesday, September 17, 2003 7:56 PM
> > > Subject: [PSUBS-MAILIST] enquiry - Propulsion
> > >
> > >
> > > > Hi All
> > > >
> > > > i have a question regarding propulsion but not for surface travel.
> > > >
> > > > I am trying to research (small ROV size) thrusters with a
magnetically
> > > > coupled shaft but am not able to find much on the subject.
> > > >
> > > > my own design thrusters are ok but i am having to look at filling
them
> > > with
> > > > oil to maintain the sealing.
> > > > i would like to do some experimenting and was wondering, is there
> anyone
> > > on
> > > > the list who has built such a device or can point me in the right
> > > direction?
> > > >
> > > > any ideas would be appreciated
> > > >
> > > > Steve Bosworth
> > > > UK
> > > >
> > > >
> > >
> > >
> >
> >
>
>
>