[PSUBS-MAILIST] compensating oil

Fri Nov 25 22:56:19 EST 2016

Brian,
Parker...
http://www.parker.com/parkerimages/pneumatic/cat/english/0711-PR364.pdf
You need to specify the relieving option & mount it upside down (handle downward)
This is to stop any water getting in the system when the relieving valve opens.
You could extend a tube off the relieving valve to be doubly careful.
I would be wary of the amount of flow you would get out of the relieving valve
before pressure would build up. If you were just air compensating & not air
over oil, it might not cope with a large volume of air expanding on ascent.
It may be OK, but this is experimental.
Cheers Alan

      From: Brian Cox via Personal_Submersibles <personal_submersibles at psubs.org>
 To: Personal Submersibles General Discussion <personal_submersibles at psubs.org> 
 Sent: Saturday, November 26, 2016 2:06 PM
 Subject: Re: [PSUBS-MAILIST] compensating oil

Alan,  do you know where I can get this OP valve?  is it stainless?  McMaster - Carr?   Cliff ? Brian

--- personal_submersibles at psubs.org wrote:

From: Alan James via Personal_Submersibles <personal_submersibles at psubs.org>
To: Personal Submersibles General Discussion <personal_submersibles at psubs.org>
Subject: Re: [PSUBS-MAILIST] compensating oil
Date: Tue, 22 Nov 2016 22:44:04 +0000 (UTC)

Brian.
No you set the regulator to 4psi or thereabouts, so there is
an overpressure inside the thruster, above ambient. This regulator
always keeps you at 4psi above ambient on the way down & on the way up
when the small volume of air in the tube expands, it forces open the relief valve.
I am not sure how much pressure above the 4psi it takes to open the relief valve
on the unit Cliff has, but this could be adjusted by replacing a spring.
Alan

      From: Brian Cox via Personal_Submersibles <personal_submersibles at psubs.org>
 To: Personal Submersibles General Discussion <personal_submersibles at psubs.org> 
 Sent: Wednesday, November 23, 2016 11:23 AM
 Subject: Re: [PSUBS-MAILIST] compensating oil

Alan,          That is an interesting way to do it.  Then you would end up with a slight vacuum after a heating cycle, which could introduce sea water if you had any leaks, or not , if you had a tight system then it would stay in equal Librium .   Hank how do you attach your hose to the inner tube? and how do you seal the tube? Brian

--- personal_submersibles at psubs.org wrote:

From: Alan James via Personal_Submersibles <personal_submersibles at psubs.org>
To: Personal Submersibles General Discussion <personal_submersibles at psubs.org>
Subject: Re: [PSUBS-MAILIST] compensating oil
Date: Tue, 22 Nov 2016 18:21:36 +0000 (UTC)

Brian,you should be able to find an information sheet on the compensatingoil that you choose. They give expansion statistics based on varioustemperatures. Cliff is using a relieving regulator set at a low psi, toeither pressurize the oil, or air if you want to just air compensate.In this case if you partially fill your line with oil then any expansioncan force air out the relieving port of the regulator.Alan

      From: Brian Cox via Personal_Submersibles <personal_submersibles at psubs.org>
 To: Personal Submersibles General Discussion <personal_submersibles at psubs.org> 
 Sent: Wednesday, November 23, 2016 6:06 AM
 Subject: Re: [PSUBS-MAILIST] compensating oil

Hank,   How much expansion volume have you observed after running your motors?    Brian

--- personal_submersibles at psubs.org wrote:

From: hank pronk via Personal_Submersibles <personal_submersibles at psubs.org>
To: Personal Submersibles General Discussion <personal_submersibles at psubs.org>
Subject: Re: [PSUBS-MAILIST] compensating oil
Date: Tue, 22 Nov 2016 16:47:26 +0000 (UTC)

Brian,  Just make a flat spot on you housing that you can bolt a rubber membrane too.  A piece of inner tube works.  Hank 

    On Tuesday, November 22, 2016 9:36 AM, Brian Cox via Personal_Submersibles <personal_submersibles at psubs.org> wrote:

 I was planning on running a line from my motor pod ( filled with oil) up to a small scuba tank.  I would have a small volume of air before the scuba tank as a place for the oil to go when it expands with the heat generated.  So in other words the whole system would be close so no oil can escape into the water.  I imagine there will be some pressure build up as the air compresses into the scuba tank but not too much.  Does anyone have a similar system ?  Brian 

--- personal_submersibles at psubs.org wrote:

From: Brian Cox via Personal_Submersibles <personal_submersibles at psubs.org>
To: "Personal Submersibles General Discussion" <personal_submersibles at psubs.org>
Subject: Re: [PSUBS-MAILIST] compensating oil
Date: Mon, 21 Nov 2016 08:35:29 -0800

Looks like the Shell product is the Diala S2 ZX - A , is the only one available in the US.    unfortunately it is only available in 55 gal drums.  it has a viscosity of 9 at 40C   not sure what kind of units that would be.    Brian

--- personal_submersibles at psubs.org wrote:

From: "Sean T. Stevenson via Personal_Submersibles" <personal_submersibles at psubs.org>
To: Personal Submersibles General Discussion <personal_submersibles at psubs.org>
Subject: Re: [PSUBS-MAILIST] compensating oil
Date: Sun, 20 Nov 2016 17:07:21 -0700

For compensating electrically energized equipment, you want to look at the Shell Diala, or ExxonMobil Voltesso oils.Sean

On November 20, 2016 4:34:44 PM MST, Alan James via Personal_Submersibles <personal_submersibles at psubs.org> wrote:
Brian,couldn't find my receipt, but Googled & this Californian companysells it at $94- for 5 gallons.SHELL MORLINA OIL S2 BL 10 - Buy Online Now! SHELL MORLINA OIL S2 ...Alan

|  
|   |  
SHELL MORLINA OIL S2 BL 10 - Buy Online Now! SHELL MORLINA OIL S2 ...
 SHELL MORLINA OIL S2 BL 10 is Sold in Small and Large Volumes at Mil-SpecProducts.com. Shell Morlina S2 BL oils ...  |  |

  |

 From: Brian Cox via Personal_Submersibles <personal_submersibles at psubs.org>
 To: Personal Submersibles General Discussion <personal_submersibles at psubs.org> 
 Sent: Monday, November 21, 2016 12:14 PM
 Subject: Re: [PSUBS-MAILIST] compensating oil

Alan,    How much is that stuff?    Are you using it for motors as well? Brian
--- personal_submersibles at psubs.org wrote:

From: Alan James via Personal_Submersibles <personal_submersibles at psubs.org>
To: Personal Submersibles General Discussion <personal_submersibles at psubs.org>
Subject: Re: [PSUBS-MAILIST] compensating oil
Date: Sun, 20 Nov 2016 04:55:34 +0000 (UTC)

Brian,I havebeen using this..http://www.dayanoilco.com/upload/product/1451803631.pdfShell morlina S2 BL 10I consulted with a technician who suggested this for my application.It's a 10cst oil. If you go too low in viscosity you shorten the lifeof your bearings.Alan

      From: Brian Cox via Personal_Submersibles <personal_submersibles at psubs.org>
 To: PSubs <personal_submersibles at psubs.org> 
 Sent: Sunday, November 20, 2016 8:49 AM
 Subject: [PSUBS-MAILIST] compensating oil

Hi All,               I know this subject has been thoroughly discussed but what would be a good oil to put in my motor pod?  Is there something about transmission fluid that would be bad?  What about hydraulic fluid?  or a light oil like a 0 - 20weight? Thanks,  Brian 
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