Megalodon O2 Solenoid Isolation Plumbing Diagram

mempilot · 31st July 2008, 21:29

I've converted my Meg O2 plumbing to allow the solenoid to be isolated in the event of a 'fail open' situation. This allows the O2 bottle valve to stay on and the Manual Addition Valve to continue to work, alleviating the need to reach back and feather the tank valve.

I can't take credit for the idea (others on the board are already doing it); however, getting the parts sorted out was a major PITA and I thought I'd share my final setup and parts list.

Total parts list cost $127 before tax and shipping. Parts were purchased through Dive Rite Express and Golem Gear (neither stocks all parts needed). Standard hoses were used and should be of length appropriate for your bottle placement and canister size. All of the new kit sits on top of the inhale CL just above the MAV and below the t-piece. I split the hoses around the t-piece which seems to hold it inline with the CL nicely.

Hope this helps others looking to do the same modification.

Eric

Pawel Szopinski · 31st July 2008, 21:42

I like it. Have you got any pics?

dave-diving · 31st July 2008, 22:04

Gregg Stanton should take the credit for the idea. He set this system up a couple of years ago and asked M&J to make a Y manifold slightly wider than normal so the shut off valve could run alongside the incomming oxygen from the 1st stage.

Gregg has a kit available for Meg owners and you can contact him at g3stanton@aol.com .

I fitted one to mine whilst diving with Gregg down in Florida a couple of years ago. It does make solenoid shutdown instant.

Will try to get Gregg to put some details up for the list.

Regards,
Dave

mempilot · 31st July 2008, 22:11

Quote: (Originally Posted by Pawel Szopinski)

I like it. Have you got any pics?

I'll have it assembled tomorrow night. I'll take some pics. It's part of a bigger project involving a DIL plumbing system for the rest of the unit.

mempilot · 31st July 2008, 22:14

Like I said, I'm not taking credit for it. Just thought the details would help others sort it out since there is no information available on it. Gregg's concept is well sound. I didn't realize he was even the first. There are several on the board that have been doing this for a while, so I didn't want to name anyone in specific in case they were not the first.

The setup makes a lot of sense and I've been meaning to get it plumbed out for some time now. With Miflex hoses, it's even sweater, lighter, and the hoses contour around the t-piece nicely.

Quote: (Originally Posted by dave-diving)

Gregg Stanton should take the credit for the idea. He set this system up a couple of years ago and asked M&J to make a Y manifold slightly wider than normal so the shut off valve could run alongside the incomming oxygen from the 1st stage.

Gregg has a kit available for Meg owners and you can contact him at g3stanton@aol.com .

I fitted one to mine whilst diving with Gregg down in Florida a couple of years ago. It does make solenoid shutdown instant.

Will try to get Gregg to put some details up for the list.

Regards,
Dave

cramerdn · 31st July 2008, 22:20

Has there been a huge rash of solonoid failures on Megs? I think I would be inclined to worry about another failure point in the path that supplies O2 but if the solonoids fail often then I guess it could be worth the risk.

dave-diving · 31st July 2008, 22:32

Gregg thought about the need to control his oxygen in caves as he spends most of his diving inside them.

There has not been a rash of failures at all but he saw the need for his diving. Just pointing out that the kit is available from a single source.

mempilot · 31st July 2008, 22:36

Quote: (Originally Posted by cramerdn)

Has there been a huge rash of solonoid failures on Megs? I think I would be inclined to worry about another failure point in the path that supplies O2 but if the solonoids fail often then I guess it could be worth the risk.

No. But feathering an O2 valve while scootering out or in tight quarters would be a real PITA.

cramerdn · 31st July 2008, 23:15

Quote: (Originally Posted by mempilot)

No. But feathering an O2 valve while scootering out or in tight quarters would be a real PITA.

Makes sense.

tecdivertraining · 1st August 2008, 00:42

I have been doing a similar thing for a couple of years since Rasmus a meg instructor in norway (nortech diving)made the shut of valves that fits directly to the first stage no need for isolators and y-blocks.

31st July 2008, 21:42	#2 (permalink)
Pawel Szopinski RBW Member Current Rebreather/s: Megalodon Other Rebreather/s: Inspiration Vision Join Date: Feb 2008 Location: London, UK Posts: 136	Re: Megalodon O2 Solenoid Isolation Plumbing Diagram I like it. Have you got any pics? __________________ "It's better to live one hour as a tiger than a whole lifetime as a worm." The Cat
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31st July 2008, 22:04	#3 (permalink)
dave-diving Human Fuktup Engineering Current Rebreather/s: Megalodon Other CCR Dolphin Other Rebreather/s: Inspiration Classic Inspiration Vision Evolution Sport Kiss Classic Kiss MK 15.X Optima Other CCR Dolphin Join Date: May 2005 Location: Britain....Cornwall Posts: 24	Re: Megalodon O2 Solenoid Isolation Plumbing Diagram Gregg Stanton should take the credit for the idea. He set this system up a couple of years ago and asked M&J to make a Y manifold slightly wider than normal so the shut off valve could run alongside the incomming oxygen from the 1st stage. Gregg has a kit available for Meg owners and you can contact him at g3stanton@aol.com . I fitted one to mine whilst diving with Gregg down in Florida a couple of years ago. It does make solenoid shutdown instant. Will try to get Gregg to put some details up for the list. Regards, Dave __________________ "Never argue with an idiot. They drag you down to their level, then beat you with experience."
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31st July 2008, 22:11	#4 (permalink)
mempilot Eric Stadtmueller Current Rebreather/s: Megalodon Other Rebreather/s: Megalodon Join Date: Aug 2006 Location: Ft. Lauderdale Posts: 1,708	Re: Megalodon O2 Solenoid Isolation Plumbing Diagram Quote: (Originally Posted by Pawel Szopinski) I like it. Have you got any pics? I'll have it assembled tomorrow night. I'll take some pics. It's part of a bigger project involving a DIL plumbing system for the rest of the unit. __________________ Eric Stadtmueller, otherwise known as, MEM "Da Pilot"
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31st July 2008, 22:14	#5 (permalink)
mempilot Eric Stadtmueller Current Rebreather/s: Megalodon Other Rebreather/s: Megalodon Join Date: Aug 2006 Location: Ft. Lauderdale Posts: 1,708	Re: Megalodon O2 Solenoid Isolation Plumbing Diagram Like I said, I'm not taking credit for it. Just thought the details would help others sort it out since there is no information available on it. Gregg's concept is well sound. I didn't realize he was even the first. There are several on the board that have been doing this for a while, so I didn't want to name anyone in specific in case they were not the first. The setup makes a lot of sense and I've been meaning to get it plumbed out for some time now. With Miflex hoses, it's even sweater, lighter, and the hoses contour around the t-piece nicely. Quote: (Originally Posted by dave-diving) Gregg Stanton should take the credit for the idea. He set this system up a couple of years ago and asked M&J to make a Y manifold slightly wider than normal so the shut off valve could run alongside the incomming oxygen from the 1st stage. Gregg has a kit available for Meg owners and you can contact him at g3stanton@aol.com . I fitted one to mine whilst diving with Gregg down in Florida a couple of years ago. It does make solenoid shutdown instant. Will try to get Gregg to put some details up for the list. Regards, Dave __________________ Eric Stadtmueller, otherwise known as, MEM "Da Pilot"
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31st July 2008, 22:20	#6 (permalink)
cramerdn Obey my dog! Current Rebreather/s: Evolution Dolphin Other Rebreather/s: Dolphin Join Date: Dec 2006 Location: Townsville QLD Posts: 730	Re: Megalodon O2 Solenoid Isolation Plumbing Diagram Has there been a huge rash of solonoid failures on Megs? I think I would be inclined to worry about another failure point in the path that supplies O2 but if the solonoids fail often then I guess it could be worth the risk. __________________ "Its better to live one day as a tiger than an entire life as a worm." "But who's ever heard of a worm skin rug?"
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31st July 2008, 22:36	#8 (permalink)
mempilot Eric Stadtmueller Current Rebreather/s: Megalodon Other Rebreather/s: Megalodon Join Date: Aug 2006 Location: Ft. Lauderdale Posts: 1,708	Re: Megalodon O2 Solenoid Isolation Plumbing Diagram Quote: (Originally Posted by cramerdn) Has there been a huge rash of solonoid failures on Megs? I think I would be inclined to worry about another failure point in the path that supplies O2 but if the solonoids fail often then I guess it could be worth the risk. No. But feathering an O2 valve while scootering out or in tight quarters would be a real PITA. __________________ Eric Stadtmueller, otherwise known as, MEM "Da Pilot"
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31st July 2008, 23:15	#9 (permalink)
cramerdn Obey my dog! Current Rebreather/s: Evolution Dolphin Other Rebreather/s: Dolphin Join Date: Dec 2006 Location: Townsville QLD Posts: 730	Re: Megalodon O2 Solenoid Isolation Plumbing Diagram Quote: (Originally Posted by mempilot) No. But feathering an O2 valve while scootering out or in tight quarters would be a real PITA. Makes sense. __________________ "Its better to live one day as a tiger than an entire life as a worm." "But who's ever heard of a worm skin rug?"
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1st August 2008, 00:42	#10 (permalink)
tecdivertraining EXPLORER Current Rebreather/s: Inspiration Classic Inspiration Vision Evolution Megalodon Ouroboros Dolphin Other Rebreather/s: Not Bought Yet Dolphin Join Date: May 2005 Location: Phuket, Thailand Posts: 531	Re: Megalodon O2 Solenoid Isolation Plumbing Diagram I have been doing a similar thing for a couple of years since Rasmus a meg instructor in norway (nortech diving)made the shut of valves that fits directly to the first stage no need for isolators and y-blocks. __________________ Mathew Partridge Technical Director Pro-Tech Dive College www.protechdivers.com www.tech-ccr.com
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