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demand regulator

   Also found in: Wikipedia 0.01 sec.
demand regulator [də′mand ‚reg·yə‚lād·ər]
(engineering)
A component of an open-circuit diving system that permits the diver to expel used air directly into the water without rebreathing exhaled carbon dioxide.


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Individual crew members are supplied with oxygen under the control of a demand regulator which ensures that breathing gas is delivered in response to inhalation demand -- at a slight positive pressure relative to the cabin's.
The pump remains on the surface as it draws in fresh air and compresses it inside a floating reservoir that supplies air to the divers demand regulator.
 
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