... into the following categories:1, 109 fluorine rubberfor: temperature 10-80 °C, weak acid, weak base, and particulate media. ... and crystallization of the media2,109 EPDM rubber suitablefor: temperature 10-120 °C, weak acid, alkalinot suitable for particulate medium ... , and crystallization of the media3,120 alloy suitablefor: temperature 10-180 °C, acids, alkalis, not suitable for particulate media ...