Externally Heated Desiccant Dryers 4.2-226 m3 / min, 150-8000 cfm Capacity range: 400-2100 cfm feet per minute (11.3-59.5 m3 / min). Pressure dew point: -40 ° F to -100 ° F (-40 ° C to -70 ° C). ISO Class 1-2 Voltage: 460 V / 3-phase / 60 Hz (400 V / 3-phase / 50 Hz). Maximum inlet pressure: 150 psi in (10.3 barg). Maximum inlet temperature: 122 ° F (50 ° C). Desiccant type: activated alumina.