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Making a Desiccant Air Dryer with Silica Gel

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awemawson:
Today it was time once more to 'cook' my silica gel to remove the moisture that it had trapped. Last time the crystals, which turn blue/black when damp, lost their nice orange hue on cooking, probably because the indicator had broken down at the 140/150 deg C that I used.

This time I set the electric oven to 120 Deg C, cooked for three hours and they have returned to a nice orange  :thumbup:

(It's now cooling under cling film to keep the moisture out)

SwarfnStuff:
Great to read that your regenerative desiccant air dryer is working as designed Andrew.
 :mmr:
Regards,
John B

RodW:
A very god project and I'm sure you saved quite a lot for a bigger desiccant drier compared with the commercial one I bought.



THis has a filter/regulator, coalescent filter and finally a dessicant drier which cost me about AUD $220. THe final filter is a motorguard style "toilet roll" filter which seems obligitory on all plasma cutters I've seen in operation.

howsitwork?:
Andrew

Well impressed, can't think how I missed this project.

Ian

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