[PSUBS-MAILIST] actuated valves?

Wed Apr 19 16:25:52 EDT 2017

OOPS! 
I made a mistake- The turbo related item that might work as a MBT vent is not the blow off valve but the "Waste-gate". Waste-gates are pressure relief valves actuated by air pressure. There are many different types of waste-gates and lots of examples on ebay.
Greg C

      From: Alec Smyth via Personal_Submersibles <personal_submersibles at psubs.org>
 To: Personal Submersibles General Discussion <personal_submersibles at psubs.org> 
 Sent: Sunday, April 16, 2017 8:31 AM
 Subject: Re: [PSUBS-MAILIST] actuated valves?

That one even looks good! However, I think I've come up with a way to just re-route the tubing that should work. So long as it works, a solution with no remotely actuated valves at all wins KISS-wise, so I'll give that a try. 
Thanks,
Alec
On Sat, Apr 15, 2017 at 11:10 PM, james cottrell via Personal_Submersibles <personal_submersibles at psubs.org> wrote:

4 psi spring return pneumatic valve for turbo applications might be an option-
1" 25mm OD Inlet BOV Blow off Valve Turbo Bypass Brass Piston Black | eBay

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1" 25mm OD Inlet BOV Blow off Valve Turbo Bypass Brass Piston Black |...
 1" 25mm OD Inlet BOV Blow off Valve Turbo Bypass Brass Piston Black | eBay Motors, Parts & Accessories,...  |   |

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      From: james cottrell via Personal_Submersibles <personal_submersibles at psubs. org>
 To: Personal Submersibles General Discussion <personal_submersibles at psubs. org> 
 Sent: Saturday, April 15, 2017 12:45 PM
 Subject: Re: [PSUBS-MAILIST] actuated valves?

Alec,You might try a Turbo blow off valve.

      From: Alec Smyth via Personal_Submersibles <personal_submersibles at psubs. org>
 To: Personal Submersibles General Discussion <personal_submersibles at psubs. org> 
 Sent: Saturday, April 15, 2017 8:13 AM
 Subject: [PSUBS-MAILIST] actuated valves?

Hi all,
I'm mulling over options for re-plumbing Shackleton's MBTs. I can go with re-positioned tubing or remotely actuated valves. In principle the tubing is easier, but I'm trying to think through all possibilities before deciding, and just thought of a new option. There's six tanks per side, and the tanks are small so it would be a challenge to put a mushroom valve inside each tank. Besides, that would be a dozen valves. However, I could also do just two valves per side, mounted outside and above the tanks, with very short hoses or tubes leading from three tanks to each valve. There is space, and because the valves would be outside the tanks I have a lot more freedom for the size or geometry of the valves. Maybe even normal ball valves actuated by a little air cylinder. This system would allow for fore-aft and side-to-side control, and would be highly resistant to list-induced water blocking. 
Anyone have thoughts on the KISSest way to control valves? For example, something that could work with unregulated 3K psi air?

Thanks,
Alec

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