Feeder tubes must display a combination of resistance to corrosion
and thermal shock to survive the harsh conditions in service.
Emhart Glass’ 333 is a zircon-mullite material that demonstrates
excellent wear resistance and resistance to thermal shock.
When used in the Metering Spout tube application, typical
service lives of six to seven months have been reported.
The material has been successfully used for tubes, plungers
and a variety of special products. Tubes, especially the self-centering
555 type, are precision ground to assure that as the tube
rotates the total runout at the glass end is minimized.
