... , improve product quality. Product throughout the drying process, in vacuum, closed environment, a mild drying process (product temperature 40-135 °C), the ... to 24 m, 1 layer to 10 layers of vacuum belt drying unit.A test prototype in the factory, welcome to see ... can be adjusted.4, the system uses a multi-stage Roots vacuum water ring vacuum pump unit.5, temperature control valves and digital ...