The vacuum of the exhaled gas is a direct function of the differential pressure of the chamber and the ambient environment. The vacuum regulator allows the exhaled gases to be carried to the outside of the chamber thereby eliminating oxygen buildup or contamination of the chamber environment. A hull-stop valve should be an integral part of the system as a safety device to shut down the vacuum should a pressure loss occur. It is recommended to use a negative spring biased back pressure differential regulator, such as the Tescom Regulator 26-2912-282A.
The regulator is designed to operate with a constant inlet pressure of 65 to 125 psig over chamber pressure.įor chamber depths over 60 FSW, a secondary vacuum regulator must be installed. The demand regulator assembly provides breathing gas on demand (inhalation). The AVOX 80 Pressur Vak II™ is designed to administer oxygen or gas mixtures to a diver or patient in a hyperbaric chamber environment.
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