Megalodon O2 Solenoid Isolation Plumbing Diagram

tecdivertraining · 1st August 2008, 00:46

here is the link

http://www.rebreatherworld.com/megal...off-valve.html

PaulTG2 · 1st August 2008, 00:54

Hello,

I was taught to disconnect the hose at the head if the solenoid stuck open. I understood that was the reason for the quick disconnect fitting was installed. It results in a faster end to O2 injection and allowed manual flying of the unit. If, for some reason, I couldn't reach it I'd turn off the O2 until my buddy could disconnect it and then turn the O2 back on to fly it manually.

Everything I've seen suggests more people die from leaving the O2 off than from solenoid failure... this seems like twice the chance of having the O2 off to start with.

Everyone's free to set-up their rigs as they see fit... it only affect their risk. But I am curious why the method I was trained for is inadequate.

Sincerely,

--p

**wedivebc** · 1st August 2008, 01:56

Quote: (Originally Posted by PaulTG2)

Hello,

I was taught to disconnect the hose at the head if the solenoid stuck open. I understood that was the reason for the quick disconnect fitting was installed. It results in a faster end to O2 injection and allowed manual flying of the unit. If, for some reason, I couldn't reach it I'd turn off the O2 until my buddy could disconnect it and then turn the O2 back on to fly it manually.

Everything I've seen suggests more people die from leaving the O2 off than from solenoid failure... this seems like twice the chance of having the O2 off to start with.

Everyone's free to set-up their rigs as they see fit... it only affect their risk. But I am curious why the method I was trained for is inadequate.

Sincerely,

--p

I am pretty sure Leon does not agree with the practice of disconnecting the QC connector. Actually the ingress of sea water into the solenoid from those who train for this are probably more likely to have a solenoid failure than those who don't.
What I was trained to do by Leon was to conduct a "boom scenario" drill which does involve shutting the oxygen islolation valve. I have spent an entire dive feathering the O2 (not on a meg) and it wasn't that difficult but I can't say I have ever tried it scootering.

mempilot · 1st August 2008, 01:57

Quote: (Originally Posted by PaulTG2)

I am curious why the method I was trained for is inadequate.

LOL. No one stated that at all.

Look, like you say, you are free to set up your rig anyway you'd like. This is a quick way to turn off the O2 to the solenoid without having to turn it off to everything else.

Me personally: I wouldn't want to be trying to reach behind my head to disconnect the line. I've tried it in a drysuit, and it isn't easy. Also, in a stuck open solenoid situation, I would be suspect of the swagelock's ability to seal after disconnecting the hose. I'd rather just isolate it and quickly.

More than one way to skin a cat though. Feathering the valve was and still is an acceptable way to deal with the problem. This is just an alternative.

mountain diver · 1st August 2008, 02:37

Quote: (Originally Posted by wedivebc)

I am pretty sure Leon does not agree with the practice of disconnecting the QC connector. Actually the ingress of sea water into the solenoid from those who train for this are probably more likely to have a solenoid failure than those who don't.
What I was trained to do by Leon was to conduct a "boom scenario" drill which does involve shutting the oxygen islolation valve. I have spent an entire dive feathering the O2 (not on a meg) and it wasn't that difficult but I can't say I have ever tried it scootering.

Yup, Leon said not to remove QC connection. The scootering part is not that bad while you feather the 02 valve, but I did have a tendency to turn left

**Fun Under Pressure** · 1st August 2008, 20:41

Looks good. Many thanks.

BHopson · 2nd August 2008, 04:30

I was at the dive shop today and saw a shut off valve for a low pressure hose which screwed right into the first stage. I don't like the idea of adding a failure point to my system that will only make things slightly more convenient in the rare event of a failed open solenoid, but I will find out who was distrbuting the valve and post the info here in a day or two. It appeared to me that it would be a much cleaner setup than the solenoid isolation rigs I've seen.

Lancer4545 · 2nd August 2008, 10:47

Hi Eric,

I have been using one of Rasmus O2 flow stops since he put the post up on here and it is just great!! I have even had to use it once and finished the dive flying the unit manually with the manual add valve.

Take a look at the flow stop Matt sent the link for as it's a lot neater and there is no need for any more hoses or a Y block. It's real easy to get to and works a treat!!

Regards,

Lance

cramerdn · 2nd August 2008, 15:25

Quote: (Originally Posted by PaulTG2)

Everything I've seen suggests more people die from leaving the O2 off than from solenoid failure... this seems like twice the chance of having the O2 off to start with.

Thats why I was asking if solonoid failures were really common. I have read of deaths on this forum from no O2 but none from stuck solonoids.

Seems likey a risky mod to me but everyone has their own risk/benifit calculations.

Chris · 3rd August 2008, 00:58

More hoses, more shutoff valves, more chance for a **** up.
Sicking to feathering here.

Cheers
Chriso

1st August 2008, 00:46	#11 (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 here is the link http://www.rebreatherworld.com/megal...off-valve.html __________________ Mathew Partridge Technical Director Pro-Tech Dive College www.protechdivers.com www.tech-ccr.com
(Offline)

1st August 2008, 00:54	#12 (permalink)
PaulTG2 RBW Member Current Rebreather/s: Megalodon Classic Kiss Other Rebreather/s: Sport Kiss Join Date: Mar 2006 Location: Virginia, USA Posts: 517	Re: Megalodon O2 Solenoid Isolation Plumbing Diagram Hello, I was taught to disconnect the hose at the head if the solenoid stuck open. I understood that was the reason for the quick disconnect fitting was installed. It results in a faster end to O2 injection and allowed manual flying of the unit. If, for some reason, I couldn't reach it I'd turn off the O2 until my buddy could disconnect it and then turn the O2 back on to fly it manually. Everything I've seen suggests more people die from leaving the O2 off than from solenoid failure... this seems like twice the chance of having the O2 off to start with. Everyone's free to set-up their rigs as they see fit... it only affect their risk. But I am curious why the method I was trained for is inadequate. Sincerely, --p __________________ Paul's first law states that the safety of an activity is determined by how forgiving of mistakes the activity is. Paul's second law states that the difference between an adventurer and an explorer is whether the doing or the learning comes first.
(Offline)

1st August 2008, 01:56	#13 (permalink)
wedivebc Dave Tomblin Current Rebreather/s: Megalodon Other CCR Other Rebreather/s: Not Bought Yet Inspiration Classic Sport Kiss Other CCR Join Date: Feb 2005 Location: Vancouver Island BC Canada Posts: 1,508	Re: Megalodon O2 Solenoid Isolation Plumbing Diagram Quote: (Originally Posted by PaulTG2) Hello, I was taught to disconnect the hose at the head if the solenoid stuck open. I understood that was the reason for the quick disconnect fitting was installed. It results in a faster end to O2 injection and allowed manual flying of the unit. If, for some reason, I couldn't reach it I'd turn off the O2 until my buddy could disconnect it and then turn the O2 back on to fly it manually. Everything I've seen suggests more people die from leaving the O2 off than from solenoid failure... this seems like twice the chance of having the O2 off to start with. Everyone's free to set-up their rigs as they see fit... it only affect their risk. But I am curious why the method I was trained for is inadequate. Sincerely, --p I am pretty sure Leon does not agree with the practice of disconnecting the QC connector. Actually the ingress of sea water into the solenoid from those who train for this are probably more likely to have a solenoid failure than those who don't. What I was trained to do by Leon was to conduct a "boom scenario" drill which does involve shutting the oxygen islolation valve. I have spent an entire dive feathering the O2 (not on a meg) and it wasn't that difficult but I can't say I have ever tried it scootering. __________________ Cheers, Dave.... Man is the only animal burdened with the knowledge he will eventually die
(Offline)

1st August 2008, 01:57	#14 (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 PaulTG2) I am curious why the method I was trained for is inadequate. LOL. No one stated that at all. Look, like you say, you are free to set up your rig anyway you'd like. This is a quick way to turn off the O2 to the solenoid without having to turn it off to everything else. Me personally: I wouldn't want to be trying to reach behind my head to disconnect the line. I've tried it in a drysuit, and it isn't easy. Also, in a stuck open solenoid situation, I would be suspect of the swagelock's ability to seal after disconnecting the hose. I'd rather just isolate it and quickly. More than one way to skin a cat though. Feathering the valve was and still is an acceptable way to deal with the problem. This is just an alternative. __________________ Eric Stadtmueller, otherwise known as, MEM "Da Pilot"
(Offline)

1st August 2008, 02:37	#15 (permalink)
mountain diver Silent Lucidity Current Rebreather/s: Megalodon Other Rebreather/s: Join Date: Mar 2006 Location: edmonton, ab. Posts: 228	Re: Megalodon O2 Solenoid Isolation Plumbing Diagram Quote: (Originally Posted by wedivebc) I am pretty sure Leon does not agree with the practice of disconnecting the QC connector. Actually the ingress of sea water into the solenoid from those who train for this are probably more likely to have a solenoid failure than those who don't. What I was trained to do by Leon was to conduct a "boom scenario" drill which does involve shutting the oxygen islolation valve. I have spent an entire dive feathering the O2 (not on a meg) and it wasn't that difficult but I can't say I have ever tried it scootering. Yup, Leon said not to remove QC connection. The scootering part is not that bad while you feather the 02 valve, but I did have a tendency to turn left __________________ You can make a choice, but you don't get to choose the consequence. All the best.
(Offline)

1st August 2008, 20:41	#16 (permalink)
Fun Under Pressure Supporting Member Current Rebreather/s: Megalodon Other Rebreather/s: Inspiration Classic Join Date: Nov 2006 Location: Germany Posts: 805	Re: Megalodon O2 Solenoid Isolation Plumbing Diagram Looks good. Many thanks. __________________ Cheers Markku Meg # 773 Dive my dreams is my life-task
(Offline)

2nd August 2008, 04:30	#17 (permalink)
BHopson New Member Current Rebreather/s: Megalodon Other Rebreather/s: Join Date: Nov 2007 Location: Florida Posts: 7	Re: Megalodon O2 Solenoid Isolation Plumbing Diagram I was at the dive shop today and saw a shut off valve for a low pressure hose which screwed right into the first stage. I don't like the idea of adding a failure point to my system that will only make things slightly more convenient in the rare event of a failed open solenoid, but I will find out who was distrbuting the valve and post the info here in a day or two. It appeared to me that it would be a much cleaner setup than the solenoid isolation rigs I've seen.
(Offline)

2nd August 2008, 10:47	#18 (permalink)
Lancer4545 RBW Member Current Rebreather/s: Megalodon Other Rebreather/s: Join Date: Jun 2007 Location: Cairns QLD Australia Posts: 748	Re: Megalodon O2 Solenoid Isolation Plumbing Diagram Hi Eric, I have been using one of Rasmus O2 flow stops since he put the post up on here and it is just great!! I have even had to use it once and finished the dive flying the unit manually with the manual add valve. Take a look at the flow stop Matt sent the link for as it's a lot neater and there is no need for any more hoses or a Y block. It's real easy to get to and works a treat!! Regards, Lance __________________ You can run but you can't hide! ISC Appointed Megalodon Dealer for East Australia http://www.closedcircuitdivers.com.au info@closedcircuitdivers.com.au
(Offline)

2nd August 2008, 15:25	#19 (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 PaulTG2) Everything I've seen suggests more people die from leaving the O2 off than from solenoid failure... this seems like twice the chance of having the O2 off to start with. Thats why I was asking if solonoid failures were really common. I have read of deaths on this forum from no O2 but none from stuck solonoids. Seems likey a risky mod to me but everyone has their own risk/benifit calculations. __________________ "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?"
(Offline)

3rd August 2008, 00:58	#20 (permalink)
Chris Go Nude Or Go Home Current Rebreather/s: Megalodon Other Rebreather/s: Inspiration Classic Megalodon Prism Topaz Sport Kiss Join Date: Feb 2005 Location: Perth, Western Australia Posts: 615	Re: Megalodon O2 Solenoid Isolation Plumbing Diagram More hoses, more shutoff valves, more chance for a **** up. Sicking to feathering here. Cheers Chriso __________________ Megalodon Sorb and Sensors whilst in Australia www.divetub.com.au Diving & Photography @ www.uwphotog.com
(Offline)

Thread Tools
Show Printable Version Email this Page
Display Modes
Linear Mode Switch to Hybrid Mode Switch to Threaded Mode