Attention: During the process of EPS beads pre-expanding in Pre-Expander !


EPS production technology: Pre-expansion

  • Excessive steam residence time and superheated steam will cause damage to EPS beads

  • Prevent steam from overheating: Do not use thermal insulation material to keep the last 5-8 meters steam pipe from the steam pressure reducing valve to the pre-expander

  • Pressure: 0.2-1.2bar = low heat content

  • Must contain some moisture to create a condensation layer on the EPS surface to slow the transfer of heat to the EPS particles.

  • Pre-expand EPS particles smoothly & uniformly

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