During the period from cleaning the fabric filter bag 32 to the formation of dust mass on the fabric filter bag 32, it is useful to filter the contaminated gas to achieve a purified gas having a relatively low particulate matter content. Fabric Filter System 26. For this purpose, the subject fabric filter system 26 particularly includes a relatively reduced contaminated gas velocity during the period from cleaning the fabric filter bag 32 to forming a mass of dust on the fabric filter bag 32. In order to control the contaminated gas velocity through the fabric filter system 26 a contaminated gas flow damper system 100 is mounted.
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