What is the purpose of the Magnehelic Pressure differential gauge?
A. The differential pressure gauge indicates the resistance of the air flowing through the carbon bed. On startup, this is a good way to check for the required air flow rate by observing the pressure drop reading. When recorded over time, the pressure drop history can indicate that problems have developed such as particulate or grease contamination. Pressure drop DOES NOT indicate that the carbon is spent and has to be replaced – only testing can show that breakthrough has started and the carbon needs to be replaced.
