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