[PSUBS-MAILIST] solenoid valves

[Jon Wallace via Personal_Submersibles]

Hank, have you spec'd a particular solenoid yet?

      From: hank pronk via Personal_Submersibles <personal_submersibles at psubs.org>
 To: Alec Smyth via Personal_Submersibles <personal_submersibles at psubs.org> 
 Sent: Tuesday, April 16, 2019 5:34 AM
 Subject: Re: [PSUBS-MAILIST] solenoid valves
   
 Hi Alec,  this might be a duplicate email.  The pneumatic valves are in E3000, so your memory is intact ;-)   I needed to experiment first with the solenoid valves first.  Turns out I only need two valves.  I like the pneumatic valves except for the plumbing, regulating and valving.  I like how simple the solenoid valves are and making an oil filled enclosure would be pretty easy.  I think I will delete two of the valves for safety for now and think about it some more.Hank
    On Monday, April 15, 2019, 7:39:34 PM MDT, Alec Smyth via Personal_Submersibles <personal_submersibles at psubs.org> wrote:  
 
 Hi Hank,
Great the new valves work so well. I recall you posting photos of a new valve during the winter, but unless my memory is playing tricks on me (which it does) I recall a small pneumatic ram, not a solenoid. Did you change that or am I wrong?
Best,
Alec 
On Mon, Apr 15, 2019 at 4:36 PM 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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