Spherasorb

[Robert]

[turbanator]

Interesting name, it implies that the granules are spherical, so have the lowest SA/Volume ratio of any shape.

Does this matter?

[beanie]

dragersorb is hemi-spherical

[NotDeadYet]

Spherasorb is spherical and has very little dust content, it also tends to settle less than granular lime. Lots of European divers use it, the makers of the EDO4 recommend it. Dr Jerome Meynie uses it and has taken it in a Mk15.5 to -180m, so I guess it works.

Cheers,

Stuart

[turbanator]

It must work, it just struck me as an inefficient shape.
If the the stuff is porous I don't suppose it makes a lot of difference.

[wreckweasel]

Originally Posted by Robert

Is anyone out there using this in their rebreathers?
I got my free 5kg of the stuff in the post from Intersurgical UK (Ok, so 5 kilos of the stuff won't last too long but it was free!).
From the data I can find it seems to generate less dust than sofnolime, but be between the two grades for efficiency, and is between the two grades for price.
Any views?

Robert

Bob,

take a look in the archives on the KISS list, we hashed this one out about a month ago.

Spherasorb seems to run at about 10% less efficiency than 797 grade sofnolime, but its reduced WOB should in theory reduce CO2 generation.

There was some test data published against the coarser mesh lime, so using that and Molecular products own test data, you can generate that extrapolation.

Myself and a couple of other chaps are playing with it as well.


/Zak

[sal C]

the new submatix semi closed rebreather uses it, Abyss uk will be stocking it.

When i test dived this unit we used this sorb, as for changing it i did find there was little dust, and easy to use. breathing rate wasnt restricted but it isnt efficient as the lime used in the inspiration. As far as i'm aware it only comes in 5kg drums and as a price comparrison it works out cheaper than sofnalime.

But if mixed with water i believe it it more caustic than sofnolime but i could be wrong

happy diving

[Duncan Price]

Originally Posted by Robert

Is anyone out there using this in their rebreathers?
I got my free 5kg of the stuff in the post from Intersurgical UK (Ok, so 5 kilos of the stuff won't last too long but it was free!).
From the data I can find it seems to generate less dust than sofnolime, but be between the two grades for efficiency, and is between the two grades for price.
Any views?

Robert

Intersurgical also do LowFloSorb which in non caustic for use in anasthesia machines - also used in the Little Dragon airway warmer thingy for hypothermia. Have used this stuff in my RB - it was free.

I use WR Grace 20 kg sodalime £35 + s/h from GOTEC.

Duncan

[Robert]

[wreckweasel]

Originally Posted by Duncan Price

Intersurgical also do LowFloSorb which in non caustic for use in anasthesia machines - also used in the Little Dragon airway warmer thingy for hypothermia. Have used this stuff in my RB - it was free.

I use WR Grace 20 kg sodalime £35 + s/h from GOTEC.

Duncan

Lowflo appears to achieve breakthrough about 30% faster than Spherasorb though..... and theres no data on moisture content or hardness on their site.

We're all playing at pick'n'mix with these sorbs