下泄热交换器将流体的温度降到合适的定值，这个温度下，净化床工作允许。
The letdown heat exchanger reduces letdown fluid temperature to a value that is compatible with the ion exchanger resin.
所有的树脂床对温度都有要求，因此当温度超过预定值时，下泄流将旁通净化床运行。
All of the ion exchanger resins are temperature sensitive; therefore, a temperature diver valve bypasses letdown flow if the letdown heat exchanger outlet temperature rises to a predetermined value.
目前公司拥有79多项包括实用新型及外观专利，更是全球第一张专利“空气净化床”的诞生地。
At present, the company has more than 79 patents, including utility model and appearance patents. Besides, it is the birthplace of the world's first patent of "Air purification Bed".
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