It is a flexible joining system that provided several advantages. For one, it made assembly so efficient that the first 300 feet were laid in two hours. In addition, crews adjusted for grade changes by deflecting the angles of the joints and eliminated the need for extra elbows. Field assembly was further simplified because the pipes could be cut at any point along their length and joined with the gasket-sealed couplings. For example, when a later excavation hit one of the pipes, the damaged portion was replaced by new pipe assembled with Dresser-style closure couplings.
Nitrox divers use an oxygen analyzer to measure the requisite amount of oxygen prior to diving.
The oxygen analyzer most widely used by professional divers is the MAXO2, made by Ceramatec Inc. of Salt Lake City. Mass. This flow restrictor measures the amount of gas needed to maintain the accuracy of the oxygen analyzer. Prior to using the flow restrictor, MAXO2 relied on a full-fledged flowmeter to meter oxygen. This was too large for the application and had to be positioned vertically in order to ensure accuracy. Nitrox Technologies chose Bird Precision to design a fixed orifice small enough to fit easily into a quick- disconnect fitting, creating the bridge between the scuba tank to be analyzed and the MAXO2.