[PSUBS-MAILIST] solenoid valves

[Alan via Personal_Submersibles]

Hank,
I have solenoid valves in my ambient & they worked really well.
I controlled them off a PlayStation 2 controller.
Mine were designed for air & were a quick solution at the time.
I have pulled a few apart & the internal parts are susceptible to 
Corrosion. A diaphragm spring comes to mind.
Yours may be different. I have designed a home made version 
that I am hoping will be more robust.
Alan

> On 16/04/2019, at 8:35 AM, hank pronk via Personal_Submersibles <personal_submersibles at psubs.org> wrote:
> 
> Hi All,
> When we were in Lake Tahoe, Alec asked if I get an air lock in my MBT vent lines.  I said no, but that got me thinking, and I may not have realized that I was getting a air lock.  Normally I dive Gamma heavy with no issues but  at Lake Tahoe I was diving very close to neutral.  The problem I was having at Lake Tahoe, was the sub leaning uncomfortable while submerging.  I blame that on the weight of the sub and since the sub was light it could not push the water out of the vent lines casing a blockage.  I like diving closer to neutral now so I installed 4 solenoid vent valves as an experiment.  It has solved the problem completely.  In fact I only need two valves to make it sink perfectly now.  With all four valves open plus the two original valves open, the sub dives in 1 min and 30 seconds.  Slow compared to Alec's sub but good for Gamma.
> 
> My next challenge is to install a bigger port in E3000.  First I am planning a proper poured concrete test pool in my new shop.  Then I will dive E3000 a couple million times in the pool.  Then I can work on a larger port assembly.
> Hank
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