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<div>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.</div><div>Hank</div><div><br></div>
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<div>----- Forwarded Message -----</div>
<div><b>From:</b> hank pronk <hanker_20032000@yahoo.ca></div><div><b>To:</b> hank pronk <hanker_20032000@yahoo.ca></div><div><b>Sent:</b> Friday, December 21, 2018, 3:49:20 PM MST</div><div><b>Subject:</b> </div><div><br></div>
<div><div dir="ltr"><br></div><div dir="ltr"><br></div><br><br>Sent from my iPhone</div>
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