DTIC ADA317310: Evaluation of the U.S. Divers pdf

DTIC ADA317310: Evaluation of the U.S. Divers

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NEDU tested the breathing effort and susceptibility to freeze-up of the U.S. Divers Nordic SCUBA regulator. Five regulators were tested in 28 deg F (-2 deg C) salt water, at depths to 198 fsw (60.7 msw). The probability of regulator failure was computed from the number of cold induced incidents, and the time to failure for each incident. There were no freeze-ups of the first or second stages. However, resistive effort was remarkably high, especially at low bottle pressures. The first stage regulator frequently malfunctioned due to the loss of silicon oil. High breathing pressure events during the resistive effort measurements occurred at mass flow rates exceeding 300 g/min at a 1500 psi supply pressure. Due to leakage of silicone oil and high breathing effort at low bottle pressures, the U.S. Divers Nordic is not recommended for Navy use in cold water (28 deg F) at any depth

• Creator/s: Defense Technical Information Center
• Date: 9/1/1996
• Year: 1996
• Book Topics/Themes: DTIC Archive, Clarke, J R, NAVY EXPERIMENTAL DIVING UNIT PANAMA CITY FL, *SCUBA APPARATUS, *COLD WATER, *BREATHING APPARATUS, *SCUBA DIVING, REGULATORS, TIME, MASS FLOW, FLOW RATE, SILICON, PRESSURE, LOSSES, SUPPLIES, RESPIRATION, OILS, BOTTLES, DIVERS, SILICONES, SALT WATER, LOW PRESSURE, FAILURE, PROBABILITY, LOW TEMPERATURE, NAVY

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