2.0 µm, Medium Speed
This grade has medium flow rate and good particle retention and is the most commonly used acid-washed filter. Grade 74 covers a wide range of general ashless filtration applications. It is used for gravimetric analysis of numerous components (e.g.: cements, copper, clay, bismuth, silicon, iron) found in heavy industries such as construction, mining or steel. Grade 74 is also used as a high purity filter for speedy filtering of trace elements such as silver chromate, lead sulfate, zinc and ammonium hydroxides. Grade 74 is also found in general soil analysis for separating solid from aqueous extracts.