The PugMaster Classic Moisture Control System was developed initially for the brick
industry.  This  system  measures two large variables (moisture content and feed rate)
and controls addition of water  required to reach a desired  extruded material moisture
content. With the addition of peripheral controls we can also control raw material feed
rate and liquid or dry additives as a ratio of the "Dry Raw  Material  Feed Rate".   We
also control the disposal of Waste Liquids (wash down water, slurries, vacuum  pump
condensate) to the Pug Mill while maintaining desired moisture control. 

This installation is at Hanson Brick's Monroe, North Carolina Plant

The chart below shows a two hour graph of moisture control.  The Blue Straight Line
is our setpoint for Column Moisture.  The Black Line is the actual calculated value for
column moisture.  The Gold line shows variation in incoming raw clay moisture.  The
 blue line is the controlled addition of water to the pugmill.