Inspiration in cold water

AlexanderRusSub · 30th September 2007, 22:08

Please, advise how to adjust Inspiration/Evolution for using in cold water : -2 C (salt water) - +4 C

AD_ward9 · 30th September 2007, 23:13

Quote: (Originally Posted by AlexanderRusSub)

Please, advise how to adjust Inspiration/Evolution for using in cold water : -2 C (salt water) - +4 C

+4C is fine on the standard Inspo with no mods.

Towards and certainly below 0C water temperature, the Inspo needs mods.

The mods I suggest is to put in a long thin bag into the inhale counterlung, and fill it with hot water before the dive (you can add a P Port to the top of the bag to do this). This keeps the inhale counterlung from sticking together, and heats the gas up so it reduces the incidence of the inhale mushroom valve sticking. The mod is quite complex, so rather than cut the Inspo bags, using a neoprene bag built from scratch, and put the hot water bag inside it using a polyurethane film tube, is probably easier.

The other area is the solenoid, watching it does not block when the equipment is being set up. The water on the solenoid can freeze easily as the solenoid opens, blocking the solenoid. When the Rebreather is fully running, there is enough heat from the scrubber to keep it clear.

Alex

**Freef** · 16th October 2007, 19:21

Quote: (Originally Posted by AD_ward9)

The mods I suggest is to put in a long thin bag into the inhale counterlung, and fill it with hot water before the dive (you can add a P Port to the top of the bag to do this). This keeps the inhale counterlung from sticking together, and heats the gas up so it reduces the incidence of the inhale mushroom valve sticking. The mod is quite complex, so rather than cut the Inspo bags, using a neoprene bag built from scratch, and put the hot water bag inside it using a polyurethane film tube, is probably easier.

The other area is the solenoid, watching it does not block when the equipment is being set up. The water on the solenoid can freeze easily as the solenoid opens, blocking the solenoid. When the Rebreather is fully running, there is enough heat from the scrubber to keep it clear.

Alex

Can't you heat the CL from the outside, and prebreathe up to operating temperature before getting in?

what2be · 16th October 2007, 22:18

Quote: (Originally Posted by AD_ward9)

+4C is fine on the standard Inspo with no mods.

Towards and certainly below 0C water temperature, the Inspo needs mods.

The mods I suggest is to put in a long thin bag into the inhale counterlung, and fill it with hot water before the dive (you can add a P Port to the top of the bag to do this). This keeps the inhale counterlung from sticking together, and heats the gas up so it reduces the incidence of the inhale mushroom valve sticking. The mod is quite complex, so rather than cut the Inspo bags, using a neoprene bag built from scratch, and put the hot water bag inside it using a polyurethane film tube, is probably easier.

The other area is the solenoid, watching it does not block when the equipment is being set up. The water on the solenoid can freeze easily as the solenoid opens, blocking the solenoid. When the Rebreather is fully running, there is enough heat from the scrubber to keep it clear.

Alex

WOW, 2 great posts from you in 2 days. Im impressed and im not being sarcastic.

AD_ward9 · 17th October 2007, 08:00

Quote: (Originally Posted by Freef)

Can't you heat the CL from the outside, and prebreathe up to operating temperature before getting in?

No. I too tried that. The seawater took too much of the heat away.

Alex

30th September 2007, 22:08	#1 (permalink)
AlexanderRusSub New Member Current Rebreather/s: Evolution Other Rebreather/s: Join Date: Nov 2006 Location: Moscow, Russia Posts: 1	Inspiration in cold water Please, advise how to adjust Inspiration/Evolution for using in cold water : -2 C (salt water) - +4 C Last edited by AlexanderRusSub : 30th September 2007 at 22:16. Reason: Specify temperature
(Offline)

30th September 2007, 23:13	#2 (permalink)
AD_ward9 RBW Member Current Rebreather/s: Other CCR Other Rebreather/s: Other CCR Join Date: Jun 2005 Location: Scotland Posts: 2,016	Re: Inspiration in cold water Quote: (Originally Posted by AlexanderRusSub) Please, advise how to adjust Inspiration/Evolution for using in cold water : -2 C (salt water) - +4 C +4C is fine on the standard Inspo with no mods. Towards and certainly below 0C water temperature, the Inspo needs mods. The mods I suggest is to put in a long thin bag into the inhale counterlung, and fill it with hot water before the dive (you can add a P Port to the top of the bag to do this). This keeps the inhale counterlung from sticking together, and heats the gas up so it reduces the incidence of the inhale mushroom valve sticking. The mod is quite complex, so rather than cut the Inspo bags, using a neoprene bag built from scratch, and put the hot water bag inside it using a polyurethane film tube, is probably easier. The other area is the solenoid, watching it does not block when the equipment is being set up. The water on the solenoid can freeze easily as the solenoid opens, blocking the solenoid. When the Rebreather is fully running, there is enough heat from the scrubber to keep it clear. Alex
(Offline)

16th October 2007, 19:21	#3 (permalink)
Freef Custom Title Disallowed! Current Rebreather/s: Dolphin Other Rebreather/s: Dolphin Join Date: Jan 2006 Location: Land of the Freef, UK. Posts: 1,427	Re: Inspiration in cold water Quote: (Originally Posted by AD_ward9) The mods I suggest is to put in a long thin bag into the inhale counterlung, and fill it with hot water before the dive (you can add a P Port to the top of the bag to do this). This keeps the inhale counterlung from sticking together, and heats the gas up so it reduces the incidence of the inhale mushroom valve sticking. The mod is quite complex, so rather than cut the Inspo bags, using a neoprene bag built from scratch, and put the hot water bag inside it using a polyurethane film tube, is probably easier. The other area is the solenoid, watching it does not block when the equipment is being set up. The water on the solenoid can freeze easily as the solenoid opens, blocking the solenoid. When the Rebreather is fully running, there is enough heat from the scrubber to keep it clear. Alex Can't you heat the CL from the outside, and prebreathe up to operating temperature before getting in? __________________ David. Diving the mahogany rebreather.
(Offline)

16th October 2007, 22:18	#4 (permalink)
what2be New Member Current Rebreather/s: Evolution Other Rebreather/s: Join Date: Apr 2006 Location: Eureka, Ca Posts: 94	Re: Inspiration in cold water Quote: (Originally Posted by AD_ward9) +4C is fine on the standard Inspo with no mods. Towards and certainly below 0C water temperature, the Inspo needs mods. The mods I suggest is to put in a long thin bag into the inhale counterlung, and fill it with hot water before the dive (you can add a P Port to the top of the bag to do this). This keeps the inhale counterlung from sticking together, and heats the gas up so it reduces the incidence of the inhale mushroom valve sticking. The mod is quite complex, so rather than cut the Inspo bags, using a neoprene bag built from scratch, and put the hot water bag inside it using a polyurethane film tube, is probably easier. The other area is the solenoid, watching it does not block when the equipment is being set up. The water on the solenoid can freeze easily as the solenoid opens, blocking the solenoid. When the Rebreather is fully running, there is enough heat from the scrubber to keep it clear. Alex WOW, 2 great posts from you in 2 days. Im impressed and im not being sarcastic. __________________ "If I die with any money at all in my bank account I know I miscalculated"
(Offline)

17th October 2007, 08:00	#5 (permalink)
AD_ward9 RBW Member Current Rebreather/s: Other CCR Other Rebreather/s: Other CCR Join Date: Jun 2005 Location: Scotland Posts: 2,016	Re: Inspiration in cold water Quote: (Originally Posted by Freef) Can't you heat the CL from the outside, and prebreathe up to operating temperature before getting in? No. I too tried that. The seawater took too much of the heat away. Alex
(Offline)

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