Expanded polystyrene machine adopts pressure reducing valve (Yoshitake, Japan) with PID valve (Burkert, Germany) to control the steam pressure, ensure constant pressure, constant temperature to achieve the foaming precision. With Germany imported vibration level sensor to control the foaming level precision to achieve the beads density precision. With electrical weighing feeding system, setting the feeding weight through touch screen, and automatic weighing to achieve material feeding weight precision. Siemens PLC control system to ensure stable control and 10 inches Siemens touch screen to ensure control screen clear and easy operation. Germany imported pressure sensor to ensure pressure control precision and Germany imported pneumatic adjustable angle seat valve to ensure steam control more stable.