- Siva (rebreather)
Siva is a model series of of
frogman 'srebreather made byCarleton Life Support . They are:
* Siva S10 oxygen rebreather, dive duration 4 hours. Worn on the front of the chest.
* Siva S24, usable as oxygen rebreather, or as a semi-closed circuit mixed gas rebreather with maximum depth normally 24 meters, can be set to 55 meters. Worn on the front of the chest.
* SIVA-55 ( [http://www.therebreathersite.nl/SemiClosed%20Rebreathers/Canada/carleton_siva_55.htm technical data] , [http://www.therebreathersite.nl/SemiClosed%20Rebreathers/Canada/photos_carleton_siva_55.htm images] ) and SIVA PLUS: superseded by the Carleton Viper. They are worn on the back.The Siva is equipped with 400 bar
titanium spheres with a total volume of 5.6 liters.The Siva 55 (55 mtrs of depth) works with any one of 3 Nitrox mixes (32.5, 40 and 60 % Oxygen) or pure oxygen. The pure oxygen is used for closed circuit diving so the diver can work without bubbles. The other Nato standard B,C and D mix are standard nitrox mixes used in semiclosed-circuit mode.
The SIVA + is a selfmixing rebreather. It works on another principle. A constant flow of oxygen is mixed with a diluent volume dependent on the ambient pressure. The deeper the diver dives, the more diluent is added, the leaner the mix is. The correct setpoint is controlled with a partial pressure measuring device (electronic). The SIVA + is capable for diving to 90 mtrs. Diluent can be air,
trimix orheliox .External links
* [http://www.carletonlifesupport.com Carleton Life Support homepage]
* [http://www.carletonlifesupport.com/Diving_SIVA.htm Carleton Life Support: Siva rebreathers]
* [http://www.therebreathersite.nl/Zuurstofrebreathers/Canada/index.html Carleton rebreathers at The_rebreather_site]
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