Oxygen cylinder regulator

Intended purpose

A reduction valve designed to be attached through a gastight connector (e.g., a pin-index or bull-nosed screw thread connection) to the valve stem of a medical gas (e.g., carbon dioxide, oxygen, nitrous oxide, gas mixture) cylinder to reduce high, variable gas pressure to a lower, constant working pressure (excludes procedure-dedicated valves). It can be a single or a dual stage regulator, usually of a piston or diaphragm design. It will have a safety relief valve to avoid excessive pressure due to increased ambient temperatures, and it may have associated devices (e.g., a manometer, flowmeter) to display the available gas reserve of a gas cylinder, the working pressure and/or the flow rate.