EPS production technology: Pre-expansion

——Why over-wet steam is not allowed during EPS beads expansion process?
       Over-wet steam lacks enough heat, with excessive water.
——It can cause expanded EPS beads’ density to be too high and cause problems
       when EPS beads are transported.
       Condensate water should be removed before steam enters the pre-expander.
——Install a drain valve at the bottom of the steam pipe.