FEATURES PLC control, automatic mode of operation, unattended. Continuous gas supply, ensure that the adsorption tower running reliable, meanwhile avoid impact of adsorbent when instantaneous switch. Long switch time. Install filter device before blower, make sure blower and adsorbent not contaminated. External heater installed; Using constant temperature controller, ensure constant temperature of regeneration air, keep off adsorbent overheated. Low purge loss, no purge loss during blower heating regeneration; 50min period during blower cooling regeneration, low regeneration purge, ensure low steady dew point air output.