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EPS pre-expander with Multiple expansion device?The machine adopts PLC and touch panel with auto filling material, auto electronic weighing, auto controlling chamber temperature, pressure and level testing to.?It uses an electronic weighing system and level sensor to control raw material volumes and expanded density, while ensuring density tolerances within 3%.?The temperature and the steam pressure in the chamber are controlled by proportion valve from Germany and advanced decompression valve from Japan. It can enable the pressure from the exit of decompression valve to be invariableness and