[PSUBS-MAILIST] First Stage Regulator for O2 service Questions

[hank pronk via Personal_Submersibles]

 Steve,I am not using an external regulator outside the hull, I don't see the need.  Gamma used to have external O2 bottles and that system had the regulator inside the hull also.Hank
    On Monday, December 25, 2017, 10:50:55 AM MST, Steve McQueen via Personal_Submersibles <personal_submersibles at psubs.org> wrote:  
 
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All, I am purchasing the system components for my K-250’s O2 system.  I am not a SCUBA diver so I lack some experience with regulators. I am considering sealed/balanced options for the first stage regulator (it will create an intermediate pressure downstream of the O2 tank (located external of the hull). These get pricey and I don’t really want to overspend for options I do not need (sealed vs. not, balanced vs. unbalanced, O2 ready vs. needing cleaned).

  

A couple of questions:
   
   - They sell regulators that are already suitable for 100% O2 use. How difficult to clean one that is not O2 ready?
   - The pediatric flow regulator (located in the hull) can directly handle the O2 tank pressure so I am wondering why we use the first stage regulators at all.
   
   - I assume to remove as many HP leak sources from within the hull especially since it is 100% O2 (safety).

  

Thoughts/recommendations?

  

Steve

  
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