[PSUBS-MAILIST] solenoid valves

[Alec Smyth via Personal_Submersibles]

Ah, I didn't realize that was on the other sub! Yes, you're right about the
simplicity of electrical. But pneumatic tends to be MUCH less failure prone
in my opinion. Bottom line, both work.

On Tue, Apr 16, 2019 at 5:19 AM hank pronk via Personal_Submersibles <
personal_submersibles at psubs.org> wrote:

> Alec,
> The pneumatic valves are on E3000, so your memory is intact.  ;-)   I am
> experimenting with the solenoids mostly and you were correct about an air
> lock in the lines.  Now I have to decide if I want to enclose the electric
> valves or put pneumatic valves in.  Turns out I only need two.  The thing I
> don't like about the pneumatic valves is all the darn plumbing and
> regulating and valving.  Electric is so simple once a nice oil filled
> housing is built.
> 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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