Why EPS beads can pre-expand in Pre expander ?
EPS production technology: Pre-expansion
Steam during normal production: dry saturated steam
– The steam pressure in steam tube of the pre-expander is 0.5-1.2 bar (111-123 ° C)
– The steam pressure in the pre-expansion barrel is 0.3-1.0 bar (102-110 °C)
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