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Dräger sampling tubes and systems - 20351 A

2.9Investigation of compressed Air, Medical Gases and Carbon Dioxide

In accordance with DIN EN 12021, compressed air used as breathable air must meet certain quality requirements. For example, air in an unloaded state cannot contain more than 15 ppm of carbon monoxide or 500 ppm of carbon dioxide. The water content in unloaded air, in the case of a drop in pressure of 200 bar, must be below 50 mg/m
3 . In thecase of a fall in pressure of 300 bar it must be below 35 mg/m
3 . Furthermore, unloadedair must also be free from odor or taste (this is generally guaranteed if the oil content isbelow 0.1 mg/m
3 ). In addition, the water content of unloaded air released by the compressor must not exceed the total pressure range of 25 mg/m
3 (DIN EN 12021).In order to check these parameters, as well as to satisfy the intended application of the various media in the form of application-specific and country-specific regulations, a quantitative test of the medium can be performed usingthe Aerotest line of products. Dräger has been active forover 100 years in the field of compressed air analysis.The Aerotest line of products allows simultaneous measurement of pollutants in outgoing air, as well as inoxygen and carbon dioxide. Dräger-Tubes form the basisfor these measurements. The Simultan Aerotest and tubesmake it possible to take a measurement in just 5 minutes.The volume flow required for the pollutant measurement(flow through Dräger-Tubes) is realized using a precisepressure relief valve and special dosage devices. Regardless of the compressor's primary pressure (max. 300 bar), the loop, or the respective residual filling pressure in the buffer cylinders, a consistent volume flow can be supported. The Aerotest Simultan is a compact design and can be connected to standard compressors, buffer cylinders, or loopswithout the use of additional tools.
D-1241-2009 Dräger Aerotest Simultan