hydrogom valve

**jmurba** · 27th September 2006, 21:43

Hi all,

I've recentely bought an hydrogom valve. I am happy with it
yesterday, I was speaking on telephone with the marea diving web site boss who told me that this valve tends to remain blocked in open position , is it rigth ?

regards

jean mi

zepp · 27th September 2006, 22:04

I have never had a problem with mine nor have heard of this from anyone else.

GKAM · 28th September 2006, 05:47

Quote: (Originally Posted by zepp)

I have never had a problem with mine nor have heard of this from anyone else.

ditto

lilou · 28th September 2006, 08:04

Same as Zepp, mine is very well

Best regards

Lilian

**jmurba** · 28th September 2006, 21:08

hi all

thanks for your replies,

the guy must have dreamt then... or it was only a false information lingering.....

an other question about it, I've seen a lot of valves with shut valves mounted at the entry , why those valve ? to solve a free flow of o2 ?

regards

jean mi

zepp · 28th September 2006, 21:14

Quote: (Originally Posted by jmurba)

hi all

thanks for your replies,

the guy must have dreamt then... or it was only a false information lingering.....

an other question about it, I've seen a lot of valves with shut valves mounted at the entry , why those valve ? to solve a free flow of o2 ?

regards

jean mi

I have a valve on mine.See here http://www.rebreatherworld.com/photo...8/limit/recent It just makes it easier to switch off the o2 flow when you finish a dive, but yes could be used to isolate the flow immediatly if your PP02 starts to get a bit high.

jaap · 28th September 2006, 22:41

Quote: (Originally Posted by zepp)

I have a valve on mine.See here http://www.rebreatherworld.com/photo...8/limit/recent It just makes it easier to switch off the o2 flow when you finish a dive, but yes could be used to isolate the flow immediatly if your PP02 starts to get a bit high.

Hi

I also have a Hydrogomvalve (I will refer to it as an H-valve), works very well. Well except that it was leaking like hell when I got it that is... But that was fixed in no time. The O-ring sealing of the plug opposit to the bypass was faulty since a far too small O-ring was fitted. Picking a more suitable one from my spares cured that.

I wonder about the choice of placing the switch off? Most configurations seem to place it upstream of the H-valve.

I see the point of being able to rapidly isolate the gas upstream of potential failure points like the O-rings inside the H-valve.

But if I would add one to my H-valve I would consider adding it downstream.
If isolation upstream of the H-valve is needed the tankvalve can be closed.
By having a valve isolating downstream of the H-valve it can be protected from moisture/floods coming from the loop with the intent to corrod/deposit salt inside.

Or have I missed something?

narked at 90 · 28th September 2006, 22:45

I would think it would be very difficult to get an open fault on this valve as the spring return is very strong, much more than any solenoid.
i have always used a shut off valve on cmf valves as it means if you need to shut of the o2 feed the gas stops flowing immediately, if you turn it off at the tank valve it can take some time for the pressure in the first stage, gauge and hoses to bleed into your breather, and it also means that you don't depressurise your first stage when turned off stopping any problems unseating the din o-ring.
kind regards john routley

Welcome Page

**jmurba** · 29th September 2006, 10:22

Hi guys,

Thanks for your precious replies,

In fact we can say all of you don't use those shut of valve to prevent a free flowing that happends usualy, but only as a mean of stopping the kiss O2 flow easily after surfacing, and to face an unlikely and rare free flowing .

Am I rigth ?

Seeing all those valves, i had ended in believing that there was a free flowing hazard.....

I addition this guy from marea diving (a web diving store) had told me on the phone that there were some problems.

so now I am ok.

last question what about the service of this valve , musdt we periodicaly have it serviced ?or service it ?

is it easy

do they sell service kits ?

regards

jean mi

27th September 2006, 21:43	#1 (permalink)
jmurba wet bear Current Rebreather/s: Home Build Other Rebreather/s: Home Build Join Date: May 2006 Location: cannes france Posts: 920	hydrogom valve Hi all, I've recentely bought an hydrogom valve. I am happy with it yesterday, I was speaking on telephone with the marea diving web site boss who told me that this valve tends to remain blocked in open position , is it rigth ? regards jean mi
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27th September 2006, 22:04	#2 (permalink)
zepp "Dyson with Death" daddy Current Rebreather/s: Classic Kiss Other CCR Home Build Other Rebreather/s: Not Bought Yet Other CCR Home Build Join Date: Sep 2005 Location: midlands Posts: 284	Re: hydrogom valve I have never had a problem with mine nor have heard of this from anyone else. __________________ I'm not a bad person.....HONEST my homebuild photos http://www.rebreatherworld.com/photo...ery.php/cat/48 CLASSIC KISS #052/shearwater The Dyson is back
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28th September 2006, 05:47	#3 (permalink)
GKAM digital nomad Current Rebreather/s: Other CCR Other Rebreather/s: Other CCR Join Date: May 2005 Location: Greece Posts: 254	Re: hydrogom valve Quote: (Originally Posted by zepp) I have never had a problem with mine nor have heard of this from anyone else. ditto __________________ Stay #
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28th September 2006, 08:04	#4 (permalink)
lilou New Member Current Rebreather/s: Optima Other Rebreather/s: Not Bought Yet Join Date: May 2005 Location: South of the France Posts: 54	Re: hydrogom valve Same as Zepp, mine is very well Best regards Lilian
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28th September 2006, 21:08	#5 (permalink)
jmurba wet bear Current Rebreather/s: Home Build Other Rebreather/s: Home Build Join Date: May 2006 Location: cannes france Posts: 920	Re: hydrogom valve hi all thanks for your replies, the guy must have dreamt then... or it was only a false information lingering..... an other question about it, I've seen a lot of valves with shut valves mounted at the entry , why those valve ? to solve a free flow of o2 ? regards jean mi
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28th September 2006, 21:14	#6 (permalink)
zepp "Dyson with Death" daddy Current Rebreather/s: Classic Kiss Other CCR Home Build Other Rebreather/s: Not Bought Yet Other CCR Home Build Join Date: Sep 2005 Location: midlands Posts: 284	Re: hydrogom valve Quote: (Originally Posted by jmurba) hi all thanks for your replies, the guy must have dreamt then... or it was only a false information lingering..... an other question about it, I've seen a lot of valves with shut valves mounted at the entry , why those valve ? to solve a free flow of o2 ? regards jean mi I have a valve on mine.See here http://www.rebreatherworld.com/photo...8/limit/recent It just makes it easier to switch off the o2 flow when you finish a dive, but yes could be used to isolate the flow immediatly if your PP02 starts to get a bit high. __________________ I'm not a bad person.....HONEST my homebuild photos http://www.rebreatherworld.com/photo...ery.php/cat/48 CLASSIC KISS #052/shearwater The Dyson is back
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28th September 2006, 22:41	#7 (permalink)
jaap Normal people worry me Current Rebreather/s: Classic Kiss Other CCR RB80 / Clone Ray Other SCR Home Build Other Rebreather/s: Other CCR RB80 / Clone Ray Other SCR Home Build Join Date: Jun 2005 Location: Stockholm Sweden Posts: 473	Re: hydrogom valve Quote: (Originally Posted by zepp) I have a valve on mine.See here http://www.rebreatherworld.com/photo...8/limit/recent It just makes it easier to switch off the o2 flow when you finish a dive, but yes could be used to isolate the flow immediatly if your PP02 starts to get a bit high. Hi I also have a Hydrogomvalve (I will refer to it as an H-valve), works very well. Well except that it was leaking like hell when I got it that is... But that was fixed in no time. The O-ring sealing of the plug opposit to the bypass was faulty since a far too small O-ring was fitted. Picking a more suitable one from my spares cured that. I wonder about the choice of placing the switch off? Most configurations seem to place it upstream of the H-valve. I see the point of being able to rapidly isolate the gas upstream of potential failure points like the O-rings inside the H-valve. But if I would add one to my H-valve I would consider adding it downstream. If isolation upstream of the H-valve is needed the tankvalve can be closed. By having a valve isolating downstream of the H-valve it can be protected from moisture/floods coming from the loop with the intent to corrod/deposit salt inside. Or have I missed something? __________________ My initials: JAAP
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28th September 2006, 22:45	#8 (permalink)
narked at 90 John Routley Current Rebreather/s: Inspiration Classic Other CCR Dolphin Home Build Other Rebreather/s: Other CCR Dolphin Home Build Join Date: Feb 2005 Location: middlands uk Posts: 1,074	Re: hydrogom valve I would think it would be very difficult to get an open fault on this valve as the spring return is very strong, much more than any solenoid. i have always used a shut off valve on cmf valves as it means if you need to shut of the o2 feed the gas stops flowing immediately, if you turn it off at the tank valve it can take some time for the pressure in the first stage, gauge and hoses to bleed into your breather, and it also means that you don't depressurise your first stage when turned off stopping any problems unseating the din o-ring. kind regards john routley Welcome Page __________________ *WWW.NARKEDAT90.CO.UK* *http://www.grpservices.com/pursuit/* Supporting Shearwater Research Products in Europe Narked at 90 Go Military
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29th September 2006, 10:22	#9 (permalink)
jmurba wet bear Current Rebreather/s: Home Build Other Rebreather/s: Home Build Join Date: May 2006 Location: cannes france Posts: 920	Re: hydrogom valve Hi guys, Thanks for your precious replies, In fact we can say all of you don't use those shut of valve to prevent a free flowing that happends usualy, but only as a mean of stopping the kiss O2 flow easily after surfacing, and to face an unlikely and rare free flowing . Am I rigth ? Seeing all those valves, i had ended in believing that there was a free flowing hazard..... I addition this guy from marea diving (a web diving store) had told me on the phone that there were some problems. so now I am ok. last question what about the service of this valve , musdt we periodicaly have it serviced ?or service it ? is it easy do they sell service kits ? regards jean mi
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