Location can affect how well an air dryer with molecular sieve performs. The site for an air-cooled dryer should be well ventilated, so heat can be carried away, and readily accessible to aid maintenance. The maximum ambient temperature for a refrigerated dryer is about 100° to 120° F. Higher temperatures prevent the dryer from exchanging heat with its surroundings and keep it from operating properly. Dryers with water-cooled condensers can tolerate higher ambient temperature because they transfer heat to the cooling water instead of to the surrounding environment. Refrigerant dryers, whether air- or water-cooled, should not be exposed to ambient temperature below 32° F unless optional low-ambient-temperature controls are installed.
If a deliquescent dryer is used in a central compressed-air system, bypass piping should be installed around the dryer to maintain air supply whenever the dryer is taken off line to add desiccant. There should also be no set of operating conditions that permit system pressure to drop low enough to allow high, turbulent air flow through the dryer that might carry chemicals into system air lines. It is important to shut off the water in water-cooled aftercoolers when the air system is shut down. A leak in the aftercooler could flood the deliquescent dryer and fill downstream piping with desiccant, making all pneumatic components inoperable.
Refrigeration and deliquescent dryers should be drained regularly, depending on the volume of liquid accumulated. Most refrigeration dryers have automatic drains, at least as an option.
It should be noted that dryers remove water vapor, while filters remove liquid water. A good drying system always has a filter with an automatic drain installed upstream from the air dryer with molecular sieve. air dryer with molecular sieves of all types are not stand-alone components. The cost of adequate prefilters, both particulate and oil coalescing, is a wise investment to protect the more expensive dryers. Postfilters are necessary for several reasons. For refrigerated dryers, a coalescing filter can catch any oil from a refrigerant leak. For deliquescent dryers, a particulate filter downstream will catch any carryover of the corrosive desiccant. For regenerative dryers, a 0.5-µm postfilter is necessary to catch desiccant dust, which is common to all adsorptive desiccants.
"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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