molecular sieve desiccant dryers can operate more efficiently by applying dew-point controls. Often, dew-point controls are already installed on a dryer, but nobody has thought to use them. These controls, through various methods, turn off the purge flow on the regenerating side once the molecular sieve desiccant has been fully reactivated, saving compressed air that would otherwise be wasted because of dryer partial loading. The switching of the dryer towers is delayed until the control senses when the molecular sieve desiccant has reached the point of saturation (or when a maximum period of time has elapsed in some dryers).
For heatless dryers, the purge flow is reduced in some proportion to the flow of air being processed. For heated dryers, the purge and cooling flow is reduced in some proportion to both the flow of air and the moisture content of the air. This gives extra savings in some circumstances. For example, because compressed air at 80 degrees F contains about half the water vapor as air at the 100-degree rating of an air dryer, the purge requirements are greatly reduced if the inlet temperatures can be lowered.
"Note：This is normal specification, in case of a particular application, specification or requirement, please contact us by email at firstname.lastname@example.org for technical information."
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