Flow Restrictors

Several Nuvair Flow Restrictors and Pressure Regulators are available for sampling compressed gas flow. All are calibrated to produce a flow rate of 1‒5 L/min with a regulator output of 100‒160 psi. Universal Flow Restrictors are used for most applications and are typically equipped with a pressure reducing regulator. When analyzing scuba tank gas, special Flow Restrictors can be used to obtain gas samples directly from the Buoyancy Compensation Device (BCD) Low-Pressure Inflator (LPI) hose. A variety of BCD flow restrictors are available to fit different types of inflator hose quick-disconnect (QD) fittings. Other Flow Restrictors connect directly to any Nuvair Pro gas analyzer senor port by using a flow adapter cap.

Click here for an informational brochure on available Flow Restrictors & Pressure Regulators.

PLEASE NOTE: Never expose gas sensors to pressure or you may cause damage and/or false readings. Damaged sensors will not provide accurate gas analysis. Inaccurate gas analysis can lead to serious personal injury or death. Most gas analyzers can be used to analyze a regulated gas sample flow, the contents of a gas cylinder, or the flow from a regulator. The flow rate of gas must equal 1-5 L/min. To produce this flow, a Flow Restrictor and Regulator—like those posted on this page—may be required. A faulty Flow Restrictor can lead to a false analyzer reading. Flow Restrictors should be regularly tested with a Flow Meter. Inaccurate gas analysis can lead to serious personal injury or death.