First solenoid stuck shut, yesterday stuck open......

silent running · 9th October 2006, 08:15

OK, so the reason why the Meg has a QC on the solenoid feed is in case it gets stuck open? Wouldn't it be simpler to just open/close the O2 tank valve for injects than disconnecting the solenoid O2 feed with a QC? No possibility for water ingress that way...

decoweenie · 9th October 2006, 08:20

Quote: (Originally Posted by silent running)

...Wouldn't it be simpler to just open/close the O2 tank valve for injects than disconnecting the solenoid O2 feed with a QC?

This only has been asked a few hundred times in the past...

I believe the reason is the Meg folks prefer to pop the QC loose, then dive the unit via manual addition button instead of via the O2 tank valve.

**Steve** · 9th October 2006, 08:24

Quote: (Originally Posted by decoweenie)

This only has been asked a few hundred times in the past...

I believe the reason is the Meg folks prefer to pop the QC loose, then dive the unit via manual addition button instead of via the O2 tank valve.

Yeah, and that it makes the unit more modular and convenient to break down. I like the break down style but prefer the valve feathering option. Aren't choices a great thing?

silent running · 9th October 2006, 09:02

Quote: (Originally Posted by Steve)

Yeah, and that it makes the unit more modular and convenient to break down. I like the break down style but prefer the valve feathering option. Aren't choices a great thing?

That makes some sense, I knew there must be another benefit I wasn't thinking of. Feathering the valve will keep the water out and is easy to do. But another QC is another thing that needs attention, however infrequent. For me taking the O2 line off the 1st stage is easy enough to do with a wrench though...

decoweenie · 9th October 2006, 09:11

Quote: (Originally Posted by silent running)

For me taking the O2 line off the 1st stage is easy enough to do with a wrench though...

Is that what you have to do on the Prism ? No screw-in on the solenoid side like the Inspo either ?

RonMicjan · 10th October 2006, 01:59

The QD is on the head to make break down easier, nowhere does ISC recommend disconnecting the qd under water, a stuck solenoid requires you to fly the unit manually using the tank valve to feather O2 in. I understand if one was 2 hours back in a cave and wanted to pop the connector off, but in most cases it would be an aborted dive and RTS. If you do disconnect under water, its like Steve said, you must rinse in fresh water and dry completly before reconnecting it.

Yann A. · 10th October 2006, 02:08

Quote: (Originally Posted by maischan)

Yann, are you saying that this is not correctly done on the product today? the O2 connection is not following the spec of the connector manufacturer?

Is anybody know why this option was taken on the meg? And is this can be a potential cause of the same solenoid problem?

Christophe,

If the manufacturer (Swage Lock) recomends a flow direction, there must be a reason. I'm sure Leon has his... Just wondering.
There's a thread on the Ouroboros and users switching the male/female position. With this pic from the catalog

Yann.

silent running · 10th October 2006, 02:27

Quote: (Originally Posted by decoweenie)

Is that what you have to do on the Prism ? No screw-in on the solenoid side like the Inspo either ?

The solenoid O2 line is a braided metal one with threaded ends both on the solenoid end-+teflon tape-and a standard LP fitting on the reg end. You must take off the reg side first, then you can undo the solenoid side. Kind of PITA, but only had to do it once so far...

silent running · 10th October 2006, 02:31

Quote: (Originally Posted by RonMicjan)

The QD is on the head to make break down easier, nowhere does ISC recommend disconnecting the qd under water, a stuck solenoid requires you to fly the unit manually using the tank valve to feather O2 in. I understand if one was 2 hours back in a cave and wanted to pop the connector off, but in most cases it would be an aborted dive and RTS. If you do disconnect under water, its like Steve said, you must rinse in fresh water and dry completly before reconnecting it.

I had a feeling that it was mostly for the breakdown. Hard to imagine disconnecting the O2 QD underwater being manufacturer recomended...

maischan · 10th October 2006, 02:32

OK so this do not have anything to do with disconnecting the stuff under water. We are just saying that on the meg today the way the connection is proposed do not follow the recommendations of the parts manufacturer.

So my question will be is this an issue or not?
Performance issue?
Side effect on facilitation of intrusion of external elements (Not only underwater if disconnected)?

9th October 2006, 08:15	#41 (permalink)
silent running Mature mouth breather Current Rebreather/s: Prism Topaz Other Rebreather/s: Join Date: Jun 2005 Location: U.S.A. Brooklyn, New York Posts: 1,814	Re: First solenoid stuck shut, yesterday stuck open...... OK, so the reason why the Meg has a QC on the solenoid feed is in case it gets stuck open? Wouldn't it be simpler to just open/close the O2 tank valve for injects than disconnecting the solenoid O2 feed with a QC? No possibility for water ingress that way...
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9th October 2006, 08:20	#42 (permalink)
decoweenie Crash Test Dummy Current Rebreather/s: Other CCR Other Rebreather/s: Other CCR Join Date: Feb 2005 Location: Cairo Posts: 5,510	Re: First solenoid stuck shut, yesterday stuck open...... Quote: (Originally Posted by silent running) ...Wouldn't it be simpler to just open/close the O2 tank valve for injects than disconnecting the solenoid O2 feed with a QC? This only has been asked a few hundred times in the past... I believe the reason is the Meg folks prefer to pop the QC loose, then dive the unit via manual addition button instead of via the O2 tank valve. __________________ "...after a while you get bored offering advice to a bull that like to keep butting the fence with its head rather than walking through the open gate..." - Rebreather World PM
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9th October 2006, 08:24	#43 (permalink)
Steve Ladies bring a plate Current Rebreather/s: Megalodon Home Build Other Rebreather/s: Not Bought Yet Inspiration Classic Sport Kiss Classic Kiss MK 15.X Home Build Join Date: Feb 2005 Location: Perth - Australia Posts: 1,103	Re: First solenoid stuck shut, yesterday stuck open...... Quote: (Originally Posted by decoweenie) This only has been asked a few hundred times in the past... I believe the reason is the Meg folks prefer to pop the QC loose, then dive the unit via manual addition button instead of via the O2 tank valve. Yeah, and that it makes the unit more modular and convenient to break down. I like the break down style but prefer the valve feathering option. Aren't choices a great thing? __________________ WARNING: I contain occasional coarse language, extreme sexual references, nudity, and adult themes, which may offend some people - Usually churchy types.
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9th October 2006, 09:02	#44 (permalink)
silent running Mature mouth breather Current Rebreather/s: Prism Topaz Other Rebreather/s: Join Date: Jun 2005 Location: U.S.A. Brooklyn, New York Posts: 1,814	Re: First solenoid stuck shut, yesterday stuck open...... Quote: (Originally Posted by Steve) Yeah, and that it makes the unit more modular and convenient to break down. I like the break down style but prefer the valve feathering option. Aren't choices a great thing? That makes some sense, I knew there must be another benefit I wasn't thinking of. Feathering the valve will keep the water out and is easy to do. But another QC is another thing that needs attention, however infrequent. For me taking the O2 line off the 1st stage is easy enough to do with a wrench though...
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9th October 2006, 09:11	#45 (permalink)
decoweenie Crash Test Dummy Current Rebreather/s: Other CCR Other Rebreather/s: Other CCR Join Date: Feb 2005 Location: Cairo Posts: 5,510	Re: First solenoid stuck shut, yesterday stuck open...... Quote: (Originally Posted by silent running) For me taking the O2 line off the 1st stage is easy enough to do with a wrench though... Is that what you have to do on the Prism ? No screw-in on the solenoid side like the Inspo either ? __________________ "...after a while you get bored offering advice to a bull that like to keep butting the fence with its head rather than walking through the open gate..." - Rebreather World PM
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10th October 2006, 01:59	#46 (permalink)
RonMicjan Cap Ron scourge of the NW Current Rebreather/s: Megalodon Dolphin Home Build Other Rebreather/s: Sport Kiss Classic Kiss Dolphin Home Build Join Date: Feb 2005 Location: Cape Disapointment, The Graveyard of the Pacific Posts: 1,083	Re: First solenoid stuck shut, yesterday stuck open...... The QD is on the head to make break down easier, nowhere does ISC recommend disconnecting the qd under water, a stuck solenoid requires you to fly the unit manually using the tank valve to feather O2 in. I understand if one was 2 hours back in a cave and wanted to pop the connector off, but in most cases it would be an aborted dive and RTS. If you do disconnect under water, its like Steve said, you must rinse in fresh water and dry completly before reconnecting it. __________________ Ron "Life is pain princess, anyone who tells you different, is selling something", The Dread Pirate Wesley. www.tmishop.com Diving bits etc.
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10th October 2006, 02:08	#47 (permalink)
Yann A. New Member Current Rebreather/s: Megalodon Other Rebreather/s: Join Date: Feb 2005 Location: Indonesia Posts: 49	Re: First solenoid stuck shut, yesterday stuck open...... Quote: (Originally Posted by maischan) Yann, are you saying that this is not correctly done on the product today? the O2 connection is not following the spec of the connector manufacturer? Is anybody know why this option was taken on the meg? And is this can be a potential cause of the same solenoid problem? Christophe, If the manufacturer (Swage Lock) recomends a flow direction, there must be a reason. I'm sure Leon has his... Just wondering. There's a thread on the Ouroboros and users switching the male/female position. With this pic from the catalog Yann.
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10th October 2006, 02:27	#48 (permalink)
silent running Mature mouth breather Current Rebreather/s: Prism Topaz Other Rebreather/s: Join Date: Jun 2005 Location: U.S.A. Brooklyn, New York Posts: 1,814	Re: First solenoid stuck shut, yesterday stuck open...... Quote: (Originally Posted by decoweenie) Is that what you have to do on the Prism ? No screw-in on the solenoid side like the Inspo either ? The solenoid O2 line is a braided metal one with threaded ends both on the solenoid end-+teflon tape-and a standard LP fitting on the reg end. You must take off the reg side first, then you can undo the solenoid side. Kind of PITA, but only had to do it once so far...
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10th October 2006, 02:31	#49 (permalink)
silent running Mature mouth breather Current Rebreather/s: Prism Topaz Other Rebreather/s: Join Date: Jun 2005 Location: U.S.A. Brooklyn, New York Posts: 1,814	Re: First solenoid stuck shut, yesterday stuck open...... Quote: (Originally Posted by RonMicjan) The QD is on the head to make break down easier, nowhere does ISC recommend disconnecting the qd under water, a stuck solenoid requires you to fly the unit manually using the tank valve to feather O2 in. I understand if one was 2 hours back in a cave and wanted to pop the connector off, but in most cases it would be an aborted dive and RTS. If you do disconnect under water, its like Steve said, you must rinse in fresh water and dry completly before reconnecting it. I had a feeling that it was mostly for the breakdown. Hard to imagine disconnecting the O2 QD underwater being manufacturer recomended...
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10th October 2006, 02:32	#50 (permalink)
maischan New Member Current Rebreather/s: Megalodon Other Rebreather/s: Join Date: Mar 2005 Location: Singapore Posts: 32	Re: First solenoid stuck shut, yesterday stuck open...... OK so this do not have anything to do with disconnecting the stuff under water. We are just saying that on the meg today the way the connection is proposed do not follow the recommendations of the parts manufacturer. So my question will be is this an issue or not? Performance issue? Side effect on facilitation of intrusion of external elements (Not only underwater if disconnected)?
(Offline)

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