How? What? Why? Eh?

black-sapphire · 11th April 2007, 21:20

heya all, was at work lying under a digger today supposedly fixing it but got bored. as always. so i started to think(risky, i know!) on the BOV operation on a KISS. I know how oc second stages work, but cudn't quite get an idea of how one works on a loop. i assume that the route of flow on a KISS is from left (inhale) shoulder to right(exhale)shoulder? say your on a dive and for some reason or other to have to bail, ppo2, flood loop, co2 whatever...and you go oc, how does the exhale non return valve on the loop work? i know the oc supply comes from a lp hose to the dv, but what about the exhale bit? the fresh gas must surely come through the mouthpiece of the loop, into you, you use it and then blow. but when you do the gas must what to go right, and push open the diaphram on the exhale bit of the loop, since this is the way its designed to open. does it follow this path to the scrubber and make its way into the inhale clung and then get vented or is there a "switching" block at the mouthpiece to allow it to bubble "normally" outside the loop?? Or am i way off the mark?? (probably) Completey confused myself on this on! an explanation would be great...it'll make me appear much smarter than i actually am, and if i pull that one off, i'll be a genius

pete611 · 11th April 2007, 21:35

Hi...you do not get pay to think.....

bobmaggi · 11th April 2007, 21:38

If I understand what you are asking.....
The BOV uses a normal second stage regulator so the exhaled air is dumped into the water, not the loop. The loop is automatically sealed once you go to the BOV so none of the air exhaled via the regulator can get into the loop.

There isn't much more to it than that - pretty simple operation.

Bob

Quote: (Originally Posted by black-sapphire)

heya all, was at work lying under a digger today supposedly fixing it but got bored. as always. so i started to think(risky, i know!) on the BOV operation on a KISS. I know how oc second stages work, but cudn't quite get an idea of how one works on a loop. i assume that the route of flow on a KISS is from left (inhale) shoulder to right(exhale)shoulder? say your on a dive and for some reason or other to have to bail, ppo2, flood loop, co2 whatever...and you go oc, how does the exhale non return valve on the loop work? i know the oc supply comes from a lp hose to the dv, but what about the exhale bit? the fresh gas must surely come through the mouthpiece of the loop, into you, you use it and then blow. but when you do the gas must what to go right, and push open the diaphram on the exhale bit of the loop, since this is the way its designed to open. does it follow this path to the scrubber and make its way into the inhale clung and then get vented or is there a "switching" block at the mouthpiece to allow it to bubble "normally" outside the loop?? Or am i way off the mark?? (probably) Completey confused myself on this on! an explanation would be great...it'll make me appear much smarter than i actually am, and if i pull that one off, i'll be a genius

fredrik · 11th April 2007, 21:38

Quote: (Originally Posted by black-sapphire)

heya all, was at work lying under a digger today supposedly fixing it but got bored. as always. so i started to think(risky, i know!) on the BOV operation on a KISS. I know how oc second stages work, but cudn't quite get an idea of how one works on a loop. i assume that the route of flow on a KISS is from left (inhale) shoulder to right(exhale)shoulder? say your on a dive and for some reason or other to have to bail, ppo2, flood loop, co2 whatever...and you go oc, how does the exhale non return valve on the loop work? i know the oc supply comes from a lp hose to the dv, but what about the exhale bit? the fresh gas must surely come through the mouthpiece of the loop, into you, you use it and then blow. but when you do the gas must what to go right, and push open the diaphram on the exhale bit of the loop, since this is the way its designed to open. does it follow this path to the scrubber and make its way into the inhale clung and then get vented or is there a "switching" block at the mouthpiece to allow it to bubble "normally" outside the loop?? Or am i way off the mark?? (probably) Completey confused myself on this on! an explanation would be great...it'll make me appear much smarter than i actually am, and if i pull that one off, i'll be a genius

When you go OC both inhale- and exhale hoses will be closed

bythesea · 11th April 2007, 21:38

Hmm. Rookie but I'll try to explain it clearly. Imagine a tube open at one end with two holes drilled on opposite sides. Stick this inside another tube just like it thats just a little bigger so they nest. Attach your breathing hoses and one way valves(mushrooms) to the openings in the side of the outer tube and put a mouthpiece at the open end. Now you have a DSV. Drill a hole 90 degrees away from the others in the outer tube and attach a OC second stage and you have a DSV with OC Bailout. By turning the inner tube 90 degrees you line up one of its two holes with the hole to the OC reg. The holes in the inner tube no longer line up to the holes in the outer tube so your Rebreather loop is closed completely.

I hope this makes sense

black-sapphire · 11th April 2007, 21:49

Quote: (Originally Posted by bythesea)

Hmm. Rookie but I'll try to explain it clearly. Imagine a tube open at one end with two holes drilled on opposite sides. Stick this inside another tube just like it thats just a little bigger so they nest. Attach your breathing hoses and one way valves(mushrooms) to the openings in the side of the outer tube and put a mouthpiece at the open end. Now you have a DSV. Drill a hole 90 degrees away from the others in the outer tube and attach a OC second stage and you have a DSV with OC Bailout. By turning the inner tube 90 degrees you line up one of its two holes with the hole to the OC reg. The holes in the inner tube no longer line up to the holes in the outer tube so your Rebreather loop is closed completely.

I hope this makes sense

thanks. clear as mud now. can see it perfectly. btw american with the sickle and hammer? oh dear...i'm not the only confused one...

bythesea · 11th April 2007, 22:14

Quote: (Originally Posted by black-sapphire)

btw american with the sickle and hammer? oh dear...i'm not the only confused one...

Thats nothing. My father was born on the border of Russia and Poland in territory under dispute. He was born in 1917 so the naturally the issue of where he comes from never got settled. Now my grandma was definetly Polish but grandpa was a naturalized American citizen from Russia. See why I'm confused? Oh, I'm also working on an IDA76 thats getting KISSed in time and which I hope to get into the water soon. Just need a QC from Swagelok to fill it and a PPort blank to hook up my KISS PPO2 displays.
Brad

Ben Field · 12th April 2007, 08:57

Dude... you are confusng yourself, nothing on the KISS is that complex.

Check out the manual, it has a strip-down of the BOV which amply shows how the sliding "cotton reel" inside seals the loop from the BOV and Vice-versa when you switch, its kinda like a shutoff valve.

Manual is a free download of the jetsam site still I believe.

Ukon · 12th April 2007, 14:41

Quote: (Originally Posted by bythesea)

Thats nothing. My father was born on the border of Russia and Poland in territory under dispute. He was born in 1917 so the naturally the issue of where he comes from never got settled. Now my grandma was definetly Polish but grandpa was a naturalized American citizen from Russia. See why I'm confused? Oh, I'm also working on an IDA76 thats getting KISSed in time and which I hope to get into the water soon. Just need a QC from Swagelok to fill it and a PPort blank to hook up my KISS PPO2 displays.
Brad

Not only that, but he lists his location as Massachusetts, better known as "The People's Republic of Massachusetts" which has long been known to be run by would be communsts from Cambridge! Really, it makes perfect sense!

LakeLover · 12th April 2007, 15:22

Mass is a "Commonwealth" not a Republic...

11th April 2007, 21:20	#1 (permalink)
black-sapphire New Member Current Rebreather/s: Not Bought Yet Other Rebreather/s: Not Bought Yet Join Date: Jan 2007 Location: N.Ireland Posts: 19	How? What? Why? Eh? heya all, was at work lying under a digger today supposedly fixing it but got bored. as always. so i started to think(risky, i know!) on the BOV operation on a KISS. I know how oc second stages work, but cudn't quite get an idea of how one works on a loop. i assume that the route of flow on a KISS is from left (inhale) shoulder to right(exhale)shoulder? say your on a dive and for some reason or other to have to bail, ppo2, flood loop, co2 whatever...and you go oc, how does the exhale non return valve on the loop work? i know the oc supply comes from a lp hose to the dv, but what about the exhale bit? the fresh gas must surely come through the mouthpiece of the loop, into you, you use it and then blow. but when you do the gas must what to go right, and push open the diaphram on the exhale bit of the loop, since this is the way its designed to open. does it follow this path to the scrubber and make its way into the inhale clung and then get vented or is there a "switching" block at the mouthpiece to allow it to bubble "normally" outside the loop?? Or am i way off the mark?? (probably) Completey confused myself on this on! an explanation would be great...it'll make me appear much smarter than i actually am, and if i pull that one off, i'll be a genius __________________ jk forrest *Ancient Chinese proverb once pondered, why can't helium be free?*
(Offline)

11th April 2007, 21:35	#2 (permalink)
pete611 RBD one dive at a time... Current Rebreather/s: Dolphin Other Rebreather/s: Dolphin Join Date: Feb 2006 Location: Puerto Rico Posts: 223	Re: How? What? Why? Eh? Hi...you do not get pay to think..... __________________ Warm Water Only For Me Please.. ><))))°> ><))))°> WARNING: the rebreather is not broken is a Dolphin!!!
(Offline)

11th April 2007, 21:38	#3 (permalink)
bobmaggi New Member Current Rebreather/s: Classic Kiss Other Rebreather/s: Join Date: Jul 2005 Location: South west Michigan Posts: 77	Re: How? What? Why? Eh? If I understand what you are asking..... The BOV uses a normal second stage regulator so the exhaled air is dumped into the water, not the loop. The loop is automatically sealed once you go to the BOV so none of the air exhaled via the regulator can get into the loop. There isn't much more to it than that - pretty simple operation. Bob Quote: (Originally Posted by black-sapphire) heya all, was at work lying under a digger today supposedly fixing it but got bored. as always. so i started to think(risky, i know!) on the BOV operation on a KISS. I know how oc second stages work, but cudn't quite get an idea of how one works on a loop. i assume that the route of flow on a KISS is from left (inhale) shoulder to right(exhale)shoulder? say your on a dive and for some reason or other to have to bail, ppo2, flood loop, co2 whatever...and you go oc, how does the exhale non return valve on the loop work? i know the oc supply comes from a lp hose to the dv, but what about the exhale bit? the fresh gas must surely come through the mouthpiece of the loop, into you, you use it and then blow. but when you do the gas must what to go right, and push open the diaphram on the exhale bit of the loop, since this is the way its designed to open. does it follow this path to the scrubber and make its way into the inhale clung and then get vented or is there a "switching" block at the mouthpiece to allow it to bubble "normally" outside the loop?? Or am i way off the mark?? (probably) Completey confused myself on this on! an explanation would be great...it'll make me appear much smarter than i actually am, and if i pull that one off, i'll be a genius
(Offline)

11th April 2007, 21:38	#4 (permalink)
fredrik Rekodeko. Sweden Current Rebreather/s: Classic Kiss Other CCR Other Rebreather/s: Other CCR Join Date: Apr 2005 Location: Sweden Posts: 193	Re: How? What? Why? Eh? Quote: (Originally Posted by black-sapphire) heya all, was at work lying under a digger today supposedly fixing it but got bored. as always. so i started to think(risky, i know!) on the BOV operation on a KISS. I know how oc second stages work, but cudn't quite get an idea of how one works on a loop. i assume that the route of flow on a KISS is from left (inhale) shoulder to right(exhale)shoulder? say your on a dive and for some reason or other to have to bail, ppo2, flood loop, co2 whatever...and you go oc, how does the exhale non return valve on the loop work? i know the oc supply comes from a lp hose to the dv, but what about the exhale bit? the fresh gas must surely come through the mouthpiece of the loop, into you, you use it and then blow. but when you do the gas must what to go right, and push open the diaphram on the exhale bit of the loop, since this is the way its designed to open. does it follow this path to the scrubber and make its way into the inhale clung and then get vented or is there a "switching" block at the mouthpiece to allow it to bubble "normally" outside the loop?? Or am i way off the mark?? (probably) Completey confused myself on this on! an explanation would be great...it'll make me appear much smarter than i actually am, and if i pull that one off, i'll be a genius When you go OC both inhale- and exhale hoses will be closed __________________ Fredrik Rekodeko, Sweden http://www.rekodeko.se
(Online)

11th April 2007, 21:38	#5 (permalink)
bythesea New Member Current Rebreather/s: Other CCR Other Rebreather/s: Other CCR Join Date: Nov 2006 Location: W.Mass, USA Posts: 74	Re: How? What? Why? Eh? Hmm. Rookie but I'll try to explain it clearly. Imagine a tube open at one end with two holes drilled on opposite sides. Stick this inside another tube just like it thats just a little bigger so they nest. Attach your breathing hoses and one way valves(mushrooms) to the openings in the side of the outer tube and put a mouthpiece at the open end. Now you have a DSV. Drill a hole 90 degrees away from the others in the outer tube and attach a OC second stage and you have a DSV with OC Bailout. By turning the inner tube 90 degrees you line up one of its two holes with the hole to the OC reg. The holes in the inner tube no longer line up to the holes in the outer tube so your Rebreather loop is closed completely. I hope this makes sense
(Offline)

11th April 2007, 21:49	#6 (permalink)
black-sapphire New Member Current Rebreather/s: Not Bought Yet Other Rebreather/s: Not Bought Yet Join Date: Jan 2007 Location: N.Ireland Posts: 19	Re: How? What? Why? Eh? Quote: (Originally Posted by bythesea) Hmm. Rookie but I'll try to explain it clearly. Imagine a tube open at one end with two holes drilled on opposite sides. Stick this inside another tube just like it thats just a little bigger so they nest. Attach your breathing hoses and one way valves(mushrooms) to the openings in the side of the outer tube and put a mouthpiece at the open end. Now you have a DSV. Drill a hole 90 degrees away from the others in the outer tube and attach a OC second stage and you have a DSV with OC Bailout. By turning the inner tube 90 degrees you line up one of its two holes with the hole to the OC reg. The holes in the inner tube no longer line up to the holes in the outer tube so your Rebreather loop is closed completely. I hope this makes sense thanks. clear as mud now. can see it perfectly. btw american with the sickle and hammer? oh dear...i'm not the only confused one... __________________ jk forrest *Ancient Chinese proverb once pondered, why can't helium be free?*
(Offline)

11th April 2007, 22:14	#7 (permalink)
bythesea New Member Current Rebreather/s: Other CCR Other Rebreather/s: Other CCR Join Date: Nov 2006 Location: W.Mass, USA Posts: 74	Re: How? What? Why? Eh? Quote: (Originally Posted by black-sapphire) btw american with the sickle and hammer? oh dear...i'm not the only confused one... Thats nothing. My father was born on the border of Russia and Poland in territory under dispute. He was born in 1917 so the naturally the issue of where he comes from never got settled. Now my grandma was definetly Polish but grandpa was a naturalized American citizen from Russia. See why I'm confused? Oh, I'm also working on an IDA76 thats getting KISSed in time and which I hope to get into the water soon. Just need a QC from Swagelok to fill it and a PPort blank to hook up my KISS PPO2 displays. Brad
(Offline)

12th April 2007, 08:57	#8 (permalink)
Ben Field CK+Shearwater Current Rebreather/s: Classic Kiss Other Rebreather/s: Sport Kiss Join Date: Aug 2005 Location: London, England Posts: 1,635	Re: How? What? Why? Eh? Dude... you are confusng yourself, nothing on the KISS is that complex. Check out the manual, it has a strip-down of the BOV which amply shows how the sliding "cotton reel" inside seals the loop from the BOV and Vice-versa when you switch, its kinda like a shutoff valve. Manual is a free download of the jetsam site still I believe. __________________ Know your PPO2, Pre-breath, Use checklists, Validate cells at 6mtrs, Use pure O2 at or near surface, Use a BOV, Don't dive Solo, Change Slime and Cells as recommended by Manufacturer and RTFM! Beware Fridge Suck! www.hugsac.org.uk
(Online)

12th April 2007, 14:41	#9 (permalink)
Ukon New Member Current Rebreather/s: Classic Kiss Other Rebreather/s: Join Date: Dec 2006 Location: Northeast Posts: 49	Re: How? What? Why? Eh? Quote: (Originally Posted by bythesea) Thats nothing. My father was born on the border of Russia and Poland in territory under dispute. He was born in 1917 so the naturally the issue of where he comes from never got settled. Now my grandma was definetly Polish but grandpa was a naturalized American citizen from Russia. See why I'm confused? Oh, I'm also working on an IDA76 thats getting KISSed in time and which I hope to get into the water soon. Just need a QC from Swagelok to fill it and a PPort blank to hook up my KISS PPO2 displays. Brad Not only that, but he lists his location as Massachusetts, better known as "The People's Republic of Massachusetts" which has long been known to be run by would be communsts from Cambridge! Really, it makes perfect sense!
(Online)

12th April 2007, 15:22	#10 (permalink)
LakeLover New Member Current Rebreather/s: Megalodon Other Rebreather/s: Join Date: Dec 2006 Location: Northern New York Posts: 72	Re: How? What? Why? Eh? Mass is a "Commonwealth" not a Republic...
(Offline)

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