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Vacuum heatless desiccant air dryer to be called the VPS technology, only needs 2.5~3% purge quantities to achieve the atmospheric dew point to -40°C; 3~3.5% purge quantities achieve the atmospheric dew point to -70°C. How about only uses 2.5~3.5% amount purge air to achieve the same with 15~26% amount purge air, therefore must be installed the vacuum pressure 25＂Hg mercury column vacuum pump, simultaneously establishes may make PS and the VPS system exchange control valve. Uses PLC programmable controller and dew point meter to control by heatless and vacuum, when vacuum pump maintenance or damage, does not affect the output to be able to continue to revolve the use, the current situation demand can from control the room with to take signal loading and monitor transmission.

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