RE: [PSUBS-MAILIST] Shaft Seal

[MerlinSub@t-online.de]

You need a ceramic pump seal. 
The engineers on the other side need the following informations: 

- shaft diameter
- shaft rpm 
- Pressure of the outside medium 
- Pressure of the inside medium 
- outside medium 
- inside medium 

And if they dont ask this question look for an other supplier... 

In my case it was:

  3"  diameter
 300  rpm 
1-40  bars outside pressure
   1  bar inside 
      Low viscosity mineral öl outside
      Air inside 

It comes out in my case with a semi custom solution for around 1600 USD 6 years ago. 

The good onces are here: 

http://www.eagleburgmann.com/

Dont use the online select your self stuff - there are thousands of 
right and wrong combinations. Ask for an offer for you application.. 

Maybe also intressting in Thurster applications is the maximum available outside space to get the seal in..
..if there are limits the should also get informations of that.  

On diesel electri sub the have to calculate both modes: 
High rpm on the surface at low pressure and low rpm at the depth and high outside pressure

vbr Carsten 


"Brian Cox" <ojaivalleybeefarm@dslextreme.com> schrieb:
> My experiance is that usally thier eyes start to glaze over and any
> meaningful information is not forthcoming.
>   -----Original Message-----
>   From: owner-personal_submersibles@psubs.org
> [mailto:owner-personal_submersibles@psubs.org]On Behalf Of Adam Lawrence
>   Sent: Wednesday, September 29, 2010 6:44 AM
>   To: personal_submersibles@psubs.org
>   Subject: Re: [PSUBS-MAILIST] Shaft Seal
> 
> 
>   Hi John,
> 
>   Mentioning that your seal is to be used in a submarine can actually work
> in your favor because it helps the sales or application engineer understand
> the level of quality you are needing. Talking all things submarines to
> vendors is sort of a test, if they shy away, that usually just tells me they
> aren't the right manufacturer for the job.
> 
>   Adam
>     ----- Original Message -----
>     From: David Bartsch
>     To: personal_submersibles@psubs.org
>     Sent: Wednesday, September 29, 2010 2:36 AM
>     Subject: RE: [PSUBS-MAILIST] Shaft Seal
> 
> 
>     John,
> 
>        I found by asking suppliers for shaft seals and describing the
> pressure to be for say a large water tank and 150psi with this pump used to
> agitate the interior contents was the best way to go. I would not mention
> submarine use. The one I was looking for was for a 1" diameter drive shaft
> and ran me about $60.00 but I need to look up the supplier for you.
>        Give me a bit of time and I will see if I have any info on this
> purchase.
> 
>                                                                             
>                                                                           Da
> vid Bartsch
> 
> 
> ----------------------------------------------------------------------------
>     From: spartan67@live.com
>     To: personal_submersibles@psubs.org
>     Subject: [PSUBS-MAILIST] Shaft Seal
>     Date: Tue, 28 Sep 2010 20:47:03 -0500
> 
> 
>     Hello, I need help on finding a right shaft seal or propeller seal. I
> don’t know how to choose one and know if they can be used in a submarine.
>     Any info would be very appreciated.
> 
>     Thank you
> 
>     John
> 




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