[PSUBS-MAILIST] automatic valve

[hank pronk via Personal_Submersibles]

 Sean,I though the same thing to just stack two valves together.  I just don't know if that is bullet proof.   I need to Google what a Kingston valve is.
Hank
    On Saturday, October 24, 2020, 11:27:57 AM MDT, Sean T. Stevenson via Personal_Submersibles <personal_submersibles at psubs.org> wrote:  
 
 I'd be inclined to look at the feasibility of plumbing two normally closed vent valves in series, requiring you to actuate both simultaneously in order to flood.

Not sure what your sea inlets look like on your MBTs, but if your vent outlets reach beyond the sea surface to air when in the fully surfaced condition, the addition of Kingston valves on the inlet side could also serve the redundancy function. Adding Kingstons would also potentially allow you to continuously monitor for leakage, as the MBTs could then be nominally held at positive pressure with respect to ambient until you were ready to flood.

Sean

-------- Original Message --------
On Oct. 24, 2020, 09:57, hank pronk via Personal_Submersibles < personal_submersibles at psubs.org> wrote:


Hi All, I am looking for a safety back up on my solenoid vent valve.  I envision an upside down foot valve.  I want a device that blocks the air flow from the MBT once submerged.   This is in case the solenoid valve gets debris in the seat and fails to seat.  I only need one auto blocker because I have two MBT's.  I can make buoyancy adjustments with the second tank.  A float that closes a valve sort of thingHank_______________________________________________
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