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The Forestry Forum

General Forestry => Drying and Processing => Topic started by: JamieK on February 20, 2023, 02:44:18 PM

Title: When to turn temp up for sterilization
Post by: JamieK on February 20, 2023, 02:44:18 PM
Hey guys, im just about to finish a load in my l200m . Currently my dry bulb is set at 120° and wet bulb is at 98°. The average moisture of the lumber is at 12% and am at day 13. At what moisture do you guys start cranking the heat up for sterilization? 
Title: Re: When to turn temp up for sterilization
Post by: K-Guy on February 20, 2023, 06:18:44 PM
It depends on if it is softwood or hardwood,  for hardwood  most dry it 8% or less,  for softwood not below 10% or the wood becomes brittle and hard to machine. 
Title: Re: When to turn temp up for sterilization
Post by: JamieK on February 20, 2023, 07:47:03 PM
So if i crank it up to 140° at 8% after 48 hours my moisture should be in the target range. Is that correct? 
Title: Re: When to turn temp up for sterilization
Post by: JamieK on February 20, 2023, 07:50:22 PM
It is hardwood in the kiln
Title: Re: When to turn temp up for sterilization
Post by: YellowHammer on February 20, 2023, 08:34:12 PM
I dry to 8% then increase the temp set point to 150°F and when that is reached, hold for 24 hours, compressor off, then let it go down slowly and it will end up at 7% and done.
Title: Re: When to turn temp up for sterilization
Post by: JamieK on February 20, 2023, 09:11:48 PM
Thank you guys, I sure appreciate your time 
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