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RE: [PSUBS-MAILIST] Great link page - mechanical seals



John Crane have a type 2100 seal that could meet trolling motor requirements.  They are available from 3/8” or 10mm up to 290 psi (20 bar).

 

Regards

 

David Paget

 

-----Original Message-----
From: owner-personal_submersibles@psubs.org [mailto:owner-personal_submersibles@psubs.org] On Behalf Of djackson99@aol.com
Sent: Friday, 9 March 2007 2:55 PM
To: personal_submersibles@psubs.org
Subject: Re: [PSUBS-MAILIST] Great link page - mechanical seals

 

A tolling motor has a shaft size of 1/4, maybe 3/8 inch; and I don't see any mechanical face seals for less than 1/2". 

The high pressure seals tend to be cartridge units like this one: http://www.klozure.com/ViewProduct?product=52&region=1

Does anyone have a manufacture recommendation?

I do have a call into a local company regarding Parker Flexseals.  It's hard to believe but they have a max of 10,000 psi:   http://www.parker.com/packing/cat/english/5350_11.pdf

 
This is the starting page for the complete rotary seal product line:
http://www.parker.com/packing/cat/english/5350_0.pdf

Please let me know what you think.

Thanks -Doug J
www.submarineboat.com

 
-----Original Message-----
From: vbra676539@aol.com
To: personal_submersibles@psubs.org
Sent: Thu, 8 Mar 2007 8:49 AM
Subject: Re: [PSUBS-MAILIST] Great link page - mechanical seals

Ceramic pump seals--don't know which one, but it shouldn't be all that hard to find. Did you ask Crane's tech staff? Vance

 

 
-----Original Message-----
From: Alec.Smyth@compuware.com
To: personal_submersibles@psubs.org
Sent: Thu, 8 Mar 2007 9:26 AM
Subject: RE: [PSUBS-MAILIST] Great link page - mechanical seals

Vance, what was it they'd done to those Minnkotas again? I remember they'd 
replaced the lip seals on the shaft, but was it with ceramic seals? Because if 
they go to 1,200 feet, I'm interested!
 
I'm been spending way too much time trying to source ceramic seals. There is a 
ubiquitous and cheap seal from John Crane called a Type 21, which in the MSC 
catalog is listed as "650 psi balanced / 250 psi unbalanced". Now, all my 
research so far indicates that whether a mechanical seal is balanced or not 
depends on the shape of the seal, and they offer only one shape, so I don't know 
what MSC is talking about. 
 
John Crane claims only the 250 psi figure, and their seals for 500 psi cost 
about 20 times as much.
 
 
thanks,
 
Alec
 
________________________________
 
From: owner-personal_submersibles@psubs.org on behalf of Joseph Perkel
Sent: Thu 3/8/2007 9:05 AM
To: personal_submersibles@psubs.org
Subject: Re: [PSUBS-MAILIST] Great link page
 
 
 
Vance,
 
The Minn Kotas are impressive!...I've seen enough now to stop worrying about 
thrusters. 
 
Nice photos of PC 1401. Of real interest to me are the saddle tanks (appears to 
be welded sheet metal), and the forward view port.
 
From what I can see so far, for my boat, the fore and aft MBT's along with the 
fairings, can be standard mold / plug / glass construction. But the saddle tanks 
have a shape more conducive to sheet over frames.
 
So my question to you is, what gauge sheet do you suppose this is, and what 
should the interior surfaces be coated with? Once sealed, these would not be 
opened again.
 
Joe
 
 
 
    
________________________________
 
    From: vbra676539@aol.com
    Reply-To: personal_submersibles@psubs.org
    To: personal_submersibles@psubs.org
    Subject: Re: [PSUBS-MAILIST] Great link page
    Date: Wed, 07 Mar 2007 15:36:12 -0500
    
    
    Re: 1401. Do you guys remember the discussion we had about Minn-Kota 
thrusters modified to sustain up to 1200 feet without compensation? Well, there 
they are. Vance
     
     
    -----Original Message-----
    From: MerlinSub@t-online.de
    To: personal_submersibles@psubs.org
    Sent: Wed, 7 Mar 2007 3:28 PM
    Subject: [PSUBS-MAILIST] Great link page
    
    
    http://www.modell-u-boote.de/links/links_originale/links_originale.html
    
    http://www.modell-u-boote.de/originale/perry_1401/perry.html
    
    http://www.modell-u-boote.de/originale/marder/marder.html
    
    http://www.modell-u-boote.de/originale/holland/holland.html
    
    regards Carsten
    
    
    
    
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