Accession Number : AD0782556

Title :   Emerson Mixed-Gas Scuba: Preliminary Evaluation of the Flow Characteristics of the Prototype Regulator-Orifice Unit.

Descriptive Note : Final rept.,

Corporate Author : NAVY EXPERIMENTAL DIVING UNIT WASHINGTON D C

Personal Author(s) : Searle,W. F. , Jr ; Zamperini,A. L.

Report Date : 01 AUG 1958

Pagination or Media Count : 22

Abstract : The study evaluates the prototype model of a mixed-gas scuba regulator-orifice unit for use as a component part of a standard U.S.N. mixed-gas scuba. The unit's stability over long time flow and its reproducibility after frequent shut downs was found to be satisfactory; its flow characteristic as a function of bottle pressure, particularly at low pressure, was found to be barely satisfactory with improvement desirable. The flow characteristics (constant-mass-flow with increasing depth) very nearly meet USN standards for both percentile error and range of constant-mass-flow, with minor discrepancies in range at low flows. The unit appears to be promising and is recommended for continued development. (Author)

Descriptors :   *Diver equipment, *Valves, *Scuba diving, Flow rate, Safety valves, Reliability, Depth

Subject Categories : Life Support Systems

Distribution Statement : APPROVED FOR PUBLIC RELEASE