Mk15.5 sorb usage

streamway_explorer · 10th November 2007, 05:33

I'm sure this has been discussed many a time before

.

But I would like to get everyones feed back on sorb duration in a 15.5 base on different sorbs,depth,current,non-current dives and so on. In the hope I will learn something new.

At the movement I have Grace Sorb in the unit.

I have been told I should get about 8-10-12hrs for dives less than -50m depth depending on how much swimming/current is during dives and other factors.

Of course I know one is always better to change it before dives greater than -50m as peace of mind,regards of time the sorb has been used.

I just like to hear everyones rule of thumb which they do regardess of what the text books say which always seem to be a lot less than the units can do.

teksimple · 10th November 2007, 07:09

Forget it. No answer will be right. You might start with getting your VO2 measured and determine the percentage of carbs you eat before your dive. Do a stress test and find your heart rate and VO2 correlation. And then bring a submersible heart rate monitor to find your exertion level. Some divers with very little muscle and low VO2's probably could do 10-12 hours going up and down an anchor line on their 15.5s. Do you get my point? Since you have a 15.5, you obviously can afford changing your scrubber every so often.

So here is some info: I had what felt like a minor breakthrough at 4 hours with 4-8 Sodasorb in the Galapagos, but I was in 59 F water in a strong current at 150 feet towards the end. Since I went to primarily Sodasorb 6-12 or Sofnolime 8-12, the most I have ever done is six hours. Observed no more than 1/3rd of the scrubber with purple color immediately after the dive. Since 90% of my dives are solo, I just do not feel relaxed if I do not have a fresh scrubber. There is something to be said for knowing that you could stay down all day if such a situation required it. Announce to your pals that you have a kick ass military rebreather and only have to change your scrubber every month under water. But then privately change it every six hours.

On the other hand, you might want to try leaving your used scrubber unwrapped on the bookshelf for two weeks like I did and experience what it is really like to have a break through. Just once. Nothing like raw experience to hone your diving style.

chunter · 10th November 2007, 20:15

Quote: (Originally Posted by teksimple)

So here is some info: I had what felt like a minor breakthrough at 4 hours with 4-8 Sodasorb in the Galapagos, but I was in 59 F water in a strong current at 150 feet towards the end.

Didn't you tell me that your loop direction was wrong on that trip?

I change my scrubber every 6 or 8 hours depending on what I expect my next dive to be. If I'm past 6 hours and plan a 300 ft dive, I'll change it out. I rarely, if ever, breathe hard. I always use 8-12 Sodasorb.

I ran my scrubber to 9 hours the other day, dumped it right after the dive, and it looked like 1/2 to 2/3 was purple (and I know that color indication doesn't mean anything). The 9 hours that I had put on it was what I would consider to be under a heavy workload (for me). If I find myself breathing heavy, I purge my loop and slow down. If that didn't resolve the problem, I'd know something was up.

If I do 2 hours of diving, I leave my canister out long enough to dry my loop, then I seal everything back up. I'll do another 2 hours, and do the same. Then another 2... I typically change out every 3 weeks.

I would feel comfortable pushing to 10 hours, but I wouldn't go into a long deep dive with 7 hours on the canister.

Obviously I speak from my own experience and don't recommend that anyone push that canister past 26 minutes.

Aloha,
Charlie

duffmiver · 10th November 2007, 21:31

Quote: (Originally Posted by chunter)

If I find myself breathing heavy, I pause the DVD and slow down.

Aloha,
Charlie

Off Topic???

teksimple · 11th November 2007, 01:15

Quote: (Originally Posted by chunter)

Didn't you tell me that your loop direction was wrong on that trip?

Very true. Thanks to someone in Pennsylvania who assembled my DSV. But couldn't have been that, right, as he said that a reversed loop would have made no difference.

That reminds me. That was the first time I received a DSV with the mushroom valves backwards, but it was not the last. The Mk 16 DSV I just got had the mushroom valves in backwards, too!

chunter · 11th November 2007, 03:21

Quote: (Originally Posted by teksimple)

Very true. Thanks to someone in Pennsylvania who assembled my DSV. But couldn't have been that, right, as he said that a reversed loop would have made no difference.

That reminds me. That was the first time I received a DSV with the mushroom valves backwards, but it was not the last. The Mk 16 DSV I just got had the mushroom valves in backwards, too!

They're out to get you.

streamway_explorer · 11th November 2007, 04:50

Quote: (Originally Posted by chunter)

Didn't you tell me that your loop direction was wrong on that trip?

I change my scrubber every 6 or 8 hours depending on what I expect my next dive to be. If I'm past 6 hours and plan a 300 ft dive, I'll change it out. I rarely, if ever, breathe hard. I always use 8-12 Sodasorb.

I ran my scrubber to 9 hours the other day, dumped it right after the dive, and it looked like 1/2 to 2/3 was purple (and I know that color indication doesn't mean anything). The 9 hours that I had put on it was what I would consider to be under a heavy workload (for me). If I find myself breathing heavy, I purge my loop and slow down. If that didn't resolve the problem, I'd know something was up.

If I do 2 hours of diving, I leave my canister out long enough to dry my loop, then I seal everything back up. I'll do another 2 hours, and do the same. Then another 2... I typically change out every 3 weeks.

I would feel comfortable pushing to 10 hours, but I wouldn't go into a long deep dive with 7 hours on the canister.

Obviously I speak from my own experience and don't recommend that anyone push that canister past 26 minutes.

Aloha,
Charlie

Thats good info from teksimple and chunter ,

thanks.

The cost of sorb is not a big deal for me to change it,to have one of these units you need deep pockets. Just needed to hear from some other mk15.5 people what they did. 6 to 8hrs sound wise with the knowledge if away in remote areas,one could pust it to 8-10hrs if needed depend on type of dive and what the sorb had done total before diving again.

So you guys prefer, 6-12 or 8-12 instead of 4-8. What are the plus and minius of the different grades being used in our units

.

I decided to empty mind out just to see how it was,its been in and out of the unit for 4 weeks now as It first lot I used since buying unit about 6 weeks ago,with 2 weekends for the course last weekend and first test dive in the pool at Colin's place 6 weeks ago. This lot saw a little more condensation than normal.Due to doing the skills in the course required i.e going from OC to CCR and leting a table spoon of water in first time doing it. You talk about colour change, So you check it straight a dive on the bases you feed it time to change anyway.

Was going to change it after today anyway base on a time factor since being put in,but as it turn out I couldnt dive unless I wanted to flood it.

Photo of my kick arse unit as you put it,

Was to do its first out of course dive today to -25m off Norah Head with a mate but just as I was starting to gear up to jump in I notice a no dive problem.

See bottom photo

I think some Cooper Hoses will ensure this is less likey to happen again.

teksimple · 11th November 2007, 14:51

Is that a complete tear in the hose? WoW. Yes, that would be near impossible to happen with a Cooper hose.

streamway_explorer · 11th November 2007, 20:08

Quote: (Originally Posted by teksimple)

Is that a complete tear in the hose? WoW. Yes, that would be near impossible to happen with a Cooper hose.

Yes you could push a coin in there. must be a wear point for these hoses,remembering how old they are. So picking up some copper hoses this week.

Shawn · 12th November 2007, 02:40

does anyone have the part number for the cooper hoses??? I was trying to pick some up but I didn't know which ones to get.

Thank you

10th November 2007, 05:33	#1 (permalink)
streamway_explorer New Member Current Rebreather/s: MK 15.X Home Build Other Rebreather/s: Not Bought Yet Inspiration Classic Home Build Join Date: Aug 2007 Location: Australia Posts: 41	Mk15.5 sorb usage I'm sure this has been discussed many a time before . But I would like to get everyones feed back on sorb duration in a 15.5 base on different sorbs,depth,current,non-current dives and so on. In the hope I will learn something new. At the movement I have Grace Sorb in the unit. I have been told I should get about 8-10-12hrs for dives less than -50m depth depending on how much swimming/current is during dives and other factors. Of course I know one is always better to change it before dives greater than -50m as peace of mind,regards of time the sorb has been used. I just like to hear everyones rule of thumb which they do regardess of what the text books say which always seem to be a lot less than the units can do. __________________ Michael Collins www.trimixdivers.com
(Offline)

10th November 2007, 07:09	#2 (permalink)
teksimple Enlightened Alpinist Current Rebreather/s: Sport Kiss MK 15.X Other Rebreather/s: Classic Kiss Join Date: Apr 2005 Location: Back in Hawaii Posts: 480	Re: Mk15.5 sorb usage Forget it. No answer will be right. You might start with getting your VO2 measured and determine the percentage of carbs you eat before your dive. Do a stress test and find your heart rate and VO2 correlation. And then bring a submersible heart rate monitor to find your exertion level. Some divers with very little muscle and low VO2's probably could do 10-12 hours going up and down an anchor line on their 15.5s. Do you get my point? Since you have a 15.5, you obviously can afford changing your scrubber every so often. So here is some info: I had what felt like a minor breakthrough at 4 hours with 4-8 Sodasorb in the Galapagos, but I was in 59 F water in a strong current at 150 feet towards the end. Since I went to primarily Sodasorb 6-12 or Sofnolime 8-12, the most I have ever done is six hours. Observed no more than 1/3rd of the scrubber with purple color immediately after the dive. Since 90% of my dives are solo, I just do not feel relaxed if I do not have a fresh scrubber. There is something to be said for knowing that you could stay down all day if such a situation required it. Announce to your pals that you have a kick ass military rebreather and only have to change your scrubber every month under water. But then privately change it every six hours. On the other hand, you might want to try leaving your used scrubber unwrapped on the bookshelf for two weeks like I did and experience what it is really like to have a break through. Just once. Nothing like raw experience to hone your diving style. __________________ ---- _____________ "I don't know the percentage of the Internet that's valid, do you? Jesus, it's scary." - Hunter S. Thompson
(Offline)

10th November 2007, 20:15	#3 (permalink)
chunter I like diving Current Rebreather/s: Sport Kiss MK 15.X Other Rebreather/s: Inspiration Classic Inspiration Vision Evolution Classic Kiss Join Date: Jul 2006 Location: Honolulu Posts: 463	Re: Mk15.5 sorb usage Quote: (Originally Posted by teksimple) So here is some info: I had what felt like a minor breakthrough at 4 hours with 4-8 Sodasorb in the Galapagos, but I was in 59 F water in a strong current at 150 feet towards the end. Didn't you tell me that your loop direction was wrong on that trip? I change my scrubber every 6 or 8 hours depending on what I expect my next dive to be. If I'm past 6 hours and plan a 300 ft dive, I'll change it out. I rarely, if ever, breathe hard. I always use 8-12 Sodasorb. I ran my scrubber to 9 hours the other day, dumped it right after the dive, and it looked like 1/2 to 2/3 was purple (and I know that color indication doesn't mean anything). The 9 hours that I had put on it was what I would consider to be under a heavy workload (for me). If I find myself breathing heavy, I purge my loop and slow down. If that didn't resolve the problem, I'd know something was up. If I do 2 hours of diving, I leave my canister out long enough to dry my loop, then I seal everything back up. I'll do another 2 hours, and do the same. Then another 2... I typically change out every 3 weeks. I would feel comfortable pushing to 10 hours, but I wouldn't go into a long deep dive with 7 hours on the canister. Obviously I speak from my own experience and don't recommend that anyone push that canister past 26 minutes. Aloha, Charlie __________________ "Foolish consistency is the hobgoblin of little minds." - Emerson "Hobgoblin is a cool word." - Charlie
(Offline)

10th November 2007, 21:31	#4 (permalink)
duffmiver New Member Current Rebreather/s: Sport Kiss Other Rebreather/s: Inspiration Classic Join Date: Feb 2007 Location: SF CA Posts: 19	Re: Mk15.5 sorb usage Quote: (Originally Posted by chunter) If I find myself breathing heavy, I pause the DVD and slow down. Aloha, Charlie Off Topic???
(Offline)

11th November 2007, 01:15	#5 (permalink)
teksimple Enlightened Alpinist Current Rebreather/s: Sport Kiss MK 15.X Other Rebreather/s: Classic Kiss Join Date: Apr 2005 Location: Back in Hawaii Posts: 480	Re: Mk15.5 sorb usage Quote: (Originally Posted by chunter) Didn't you tell me that your loop direction was wrong on that trip? Very true. Thanks to someone in Pennsylvania who assembled my DSV. But couldn't have been that, right, as he said that a reversed loop would have made no difference. That reminds me. That was the first time I received a DSV with the mushroom valves backwards, but it was not the last. The Mk 16 DSV I just got had the mushroom valves in backwards, too! __________________ ---- _____________ "I don't know the percentage of the Internet that's valid, do you? Jesus, it's scary." - Hunter S. Thompson
(Offline)

11th November 2007, 03:21	#6 (permalink)
chunter I like diving Current Rebreather/s: Sport Kiss MK 15.X Other Rebreather/s: Inspiration Classic Inspiration Vision Evolution Classic Kiss Join Date: Jul 2006 Location: Honolulu Posts: 463	Re: Mk15.5 sorb usage Quote: (Originally Posted by teksimple) Very true. Thanks to someone in Pennsylvania who assembled my DSV. But couldn't have been that, right, as he said that a reversed loop would have made no difference. That reminds me. That was the first time I received a DSV with the mushroom valves backwards, but it was not the last. The Mk 16 DSV I just got had the mushroom valves in backwards, too! They're out to get you. __________________ "Foolish consistency is the hobgoblin of little minds." - Emerson "Hobgoblin is a cool word." - Charlie
(Offline)

11th November 2007, 04:50	#7 (permalink)
streamway_explorer New Member Current Rebreather/s: MK 15.X Home Build Other Rebreather/s: Not Bought Yet Inspiration Classic Home Build Join Date: Aug 2007 Location: Australia Posts: 41	Re: Mk15.5 sorb usage Quote: (Originally Posted by chunter) Didn't you tell me that your loop direction was wrong on that trip? I change my scrubber every 6 or 8 hours depending on what I expect my next dive to be. If I'm past 6 hours and plan a 300 ft dive, I'll change it out. I rarely, if ever, breathe hard. I always use 8-12 Sodasorb. I ran my scrubber to 9 hours the other day, dumped it right after the dive, and it looked like 1/2 to 2/3 was purple (and I know that color indication doesn't mean anything). The 9 hours that I had put on it was what I would consider to be under a heavy workload (for me). If I find myself breathing heavy, I purge my loop and slow down. If that didn't resolve the problem, I'd know something was up. If I do 2 hours of diving, I leave my canister out long enough to dry my loop, then I seal everything back up. I'll do another 2 hours, and do the same. Then another 2... I typically change out every 3 weeks. I would feel comfortable pushing to 10 hours, but I wouldn't go into a long deep dive with 7 hours on the canister. Obviously I speak from my own experience and don't recommend that anyone push that canister past 26 minutes. Aloha, Charlie Thats good info from teksimple and chunter , thanks. The cost of sorb is not a big deal for me to change it,to have one of these units you need deep pockets. Just needed to hear from some other mk15.5 people what they did. 6 to 8hrs sound wise with the knowledge if away in remote areas,one could pust it to 8-10hrs if needed depend on type of dive and what the sorb had done total before diving again. So you guys prefer, 6-12 or 8-12 instead of 4-8. What are the plus and minius of the different grades being used in our units . I decided to empty mind out just to see how it was,its been in and out of the unit for 4 weeks now as It first lot I used since buying unit about 6 weeks ago,with 2 weekends for the course last weekend and first test dive in the pool at Colin's place 6 weeks ago. This lot saw a little more condensation than normal.Due to doing the skills in the course required i.e going from OC to CCR and leting a table spoon of water in first time doing it. You talk about colour change, So you check it straight a dive on the bases you feed it time to change anyway. Was going to change it after today anyway base on a time factor since being put in,but as it turn out I couldnt dive unless I wanted to flood it. Photo of my kick arse unit as you put it, Was to do its first out of course dive today to -25m off Norah Head with a mate but just as I was starting to gear up to jump in I notice a no dive problem. See bottom photo I think some Cooper Hoses will ensure this is less likey to happen again. __________________ Michael Collins www.trimixdivers.com
(Offline)

11th November 2007, 14:51	#8 (permalink)
teksimple Enlightened Alpinist Current Rebreather/s: Sport Kiss MK 15.X Other Rebreather/s: Classic Kiss Join Date: Apr 2005 Location: Back in Hawaii Posts: 480	Re: Mk15.5 sorb usage Is that a complete tear in the hose? WoW. Yes, that would be near impossible to happen with a Cooper hose. __________________ ---- _____________ "I don't know the percentage of the Internet that's valid, do you? Jesus, it's scary." - Hunter S. Thompson
(Offline)

11th November 2007, 20:08	#9 (permalink)
streamway_explorer New Member Current Rebreather/s: MK 15.X Home Build Other Rebreather/s: Not Bought Yet Inspiration Classic Home Build Join Date: Aug 2007 Location: Australia Posts: 41	Re: Mk15.5 sorb usage Quote: (Originally Posted by teksimple) Is that a complete tear in the hose? WoW. Yes, that would be near impossible to happen with a Cooper hose. Yes you could push a coin in there. must be a wear point for these hoses,remembering how old they are. So picking up some copper hoses this week. __________________ Michael Collins www.trimixdivers.com
(Offline)

12th November 2007, 02:40	#10 (permalink)
Shawn Custom Title Allowed! Current Rebreather/s: Megalodon Other CCR RB80 / Clone Other Rebreather/s: Other CCR RB80 / Clone Join Date: Oct 2007 Location: Kansas City Kansas Posts: 106	Re: Mk15.5 sorb usage does anyone have the part number for the cooper hoses??? I was trying to pick some up but I didn't know which ones to get. Thank you __________________ WWW.DiveOne.net
(Offline)

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