75mm STANDARD & DE-AIRING PUG MILL
To successfully de-air clay, there need only be a small hole from the vacuum chamber into the pugmill barrel. The de-airing slot can be cleared swiftly by quickly flicking the vacuum dump tap on and off. For satisfactory de-airing the vacuum gauge should read 0.9 bar (90kPa) or more 0.95-0.98 bar (95-98 kPa) is ideal.