[PSUBS-MAILIST] Purge Valve

[Alan via Personal_Submersibles]

Thanks Hank,
With a system of valves I can have one pump performing a number
of functions.
Alan

> On 30/03/2019, at 10:24 PM, hank pronk via Personal_Submersibles <personal_submersibles at psubs.org> wrote:
> 
> Alan, I see no reason why that would not work.  Emile mentioned that the Mantis subs have a very clever water powered arm.
> Hank
> 
> On Friday, March 29, 2019, 9:37:08 PM MDT, Alan via Personal_Submersibles <personal_submersibles at psubs.org> wrote:
> 
> 
> Hank,
> I am using a 36V 750 psi pressure washer pump on my sub for trim & ballast
> adjustment. It is supposed to have a corrosion proof pump, although would
> need flushing out after salt water use.
> I am wondering about the feasibility of using it to power manipulator hydraulics
> using  water. I had heard that Nuytco had used a water hydraulics system.
> Are you familiar with that at all, or have any thoughts on this?
> My maximum operating depth is 500ft so I should have 500psi above my 
> maximum ambient pressure.
> Alan
> 
> 
>> On 30/03/2019, at 1:38 PM, hank pronk via Personal_Submersibles <personal_submersibles at psubs.org> wrote:
>> 
>> Alan, same as David, bleeds on both yokes
>> Hank
>> 
>> On Friday, March 29, 2019, 1:50:14 PM MDT, Alan via Personal_Submersibles <personal_submersibles at psubs.org> wrote:
>> 
>> 
>> Thanks everyone,
>> It might be easiest & safest in my case ( 1 person sub ) to just shut off the
>> Bottles & reach inside the hull & bleed air & O2 from there.
>> It saves putting another fitting in line that may leak. Also there may be the
>> Possibility of leaving the purge valve open, although no doubt you would hear
>> It when you turned the air on! 
>> Alan
>> 
>>> On 30/03/2019, at 7:36 AM, Rick Patton via Personal_Submersibles <personal_submersibles at psubs.org> wrote:
>>> 
>>> Alan,
>>> My O2 tanks are outside and I have a O2 cleaned 1st stage to knock it down to LP before coming into the sub so I bought a CGA 540 to go onto the bottle and then a bleed fitting that goes to that like I think you are looking for then a machined fitting with O ring like a scuba tank valve that my 1st stage reg attaches to. Go to "thescubadiversstore.com" and then type in the search bar 46335 and it will pull up a bleed part but the one I have does not the have threaded port for a gauge. The guy was really great to work with and good prices as well. This will get you started and when I get to me shop, I'l look up the part number that doesn't have the gauge port and get that to ya.
>>> Rick
>>> 
>>> On Thu, Mar 28, 2019 at 6:06 PM Alan via Personal_Submersibles <personal_submersibles at psubs.org> wrote:
>>> Hi,
>>> Just wondering if people use / have an external valve to purge air / O2 from the 
>>> system to enable the removal of the first stage yoke from the tank.
>>> With a dive set up you just press the second stage purge valve.
>>> Alan
>>> 
>>> 
>>> 
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>> 
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