[PSUBS-MAILIST] (no subject)

[Alec Smyth via Personal_Submersibles]

Now that looks really presentable! But I’m not understanding the issue with the low pressure side. Why would that need protecting, is it not open to the sea?

Thanks,
Alec




> On Dec 21, 2018, at 5:56 PM, hank pronk via Personal_Submersibles <personal_submersibles at psubs.org> wrote:
> 
> Hello fellow sub nerds.  After do some total destruction testing of my prototype vent valve - I have decided to replace the plastic top with an aluminum disk.   Also I had to pressurize the air cylinder until it exploded before the piston seal would leak.  I was hoping it had a weaker seal so that the cylinder would be self protecting from water pressure.  The test shows that a compensation system needs to be added to protect the low pressure side of the piston.  No problem - I will mount a second small air cylinder in the air line to act a compensator.  I now have three valves built and ready to install.
> Hank
> 
> ----- Forwarded Message -----
> From: hank pronk <hanker_20032000 at yahoo.ca>
> To: hank pronk <hanker_20032000 at yahoo.ca>
> Sent: Friday, December 21, 2018, 3:49:20 PM MST
> Subject:
> 
> 
> 
> 
> 
> Sent from my iPhone
> <IMG_0253.jpg>
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