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Dry Kiln Maintenance / Re: Protecting Boilers
« Last post by ingo wallocha on January 16, 2017, 02:03:19 PM »
Hello Eric,

What do you mean...? Can you describe your problem a little closer?


Moisture Variability / Re: Deciding when to use equalization
« Last post by ingo wallocha on January 16, 2017, 01:51:30 PM »
Hello Eric,

If your standard deviation is 4% an above equalization or reconditioning would most probably be a good idea. What species do you dry and what would you have available for reconditioning? High pressure hot water or low pressure steam? Or just cold water sprays?

What is your incoming standard deviation? I mean you can sort of reverse engineer that problem by introducing very uniform initial moisture contents in the kiln but that would require some kind of sorting. 

I need some more information to make a final judgement and give you some suggestions.

Looking forward to your reply!

Moisture Variability / Deciding when to use equalization
« Last post by TILLAMOOK on January 16, 2017, 09:30:40 AM »
Deciding when to use equalization.  If your standard deviation is high (above a 4) can equalization be a viable and economically valuable tool specifically with Hemlock or other white fir?
Hello Everyone,

This is my first post so be patient with me  ::)

I work for Valutec Wood Dryers and we are out of Vancouver, Canada. Our head office is in Sweden. We are suppliers for softwood lumber dry kilns and the leading company in Europe. In Europe progressive or continuous kilns are pretty common since about 30 years. However, our approach is different to what is common in North America with the counter flow kilns. Unlike there our kilns have a unidirectional concept which means that the lumber moves through the kiln just in one direction.  We have doors and vents and zone the kiln into different climate zones so we are pretty flexible with what we can dry since it's like many small batch kilns drying in one line. Please click on this link for more information:

My question now is what you as users and experts would think the advantages and disadvantages of both systems are so we can watch and learn.

You can visit our website if you want to know more.

I hope to get as many responds as possible  :D Thank you!


Training / Events / UBC Certificate in Kiln Drying
« Last post by admin on January 13, 2017, 09:22:20 AM »
Program Overview

The drying of wood is a complex scientific process where many different technologies have a role to play. To effectively dry wood one must understand the basics of wood anatomy such as the water vapour diffusion process, as well as the physics of heat and air circulation, and computer control technologies. A focused attitude towards quality is a key element in any good kiln drying operation.

Improper drying in wood can lead to significant losses in yield and value in lumber. End checks, warp, split and other drying defects such as moisture content variation are all common defects that will lead to reduced efficiencies that affect other parts of the production process. Most of these increased costs are as a result of skills deficiencies rather than being attributable to equipment failure. Many facilities routinely accept kiln drying losses of 5 to 10 % without questioning the reason for these losses. Experts have concluded that at least half of these losses can be recovered with better drying practices resulting from skills upgrading by operators and managers.

Kiln drying has become much more technologically complex in recent years. More lumber in both primary and secondary manufacturing is now being custom dried for specific value-added end products. Training and education relevant to kiln drying has not kept up with these changes. In the mid 1990s a formal audit of industry needs identified the need for a comprehensive training program to provide professionals involved in kiln drying with the skills needed to ensure optimal value and volume recovery from the drying process. It is within this context that the UBC Kiln Drying Certificate Program was developed.

The goal of the Kiln Drying Certificate Program is to provide industry respected training that is specifically geared towards secondary and advanced primary manufacturing. The training program certifies competency to operate dry kilns, as determined by standards established by the wood products industry.

The full program entails approximately 150 hours of instruction, offered via a series of six modules that range in duration from two to five days. The modules blend the teaching of solid scientific principles with a practical solutions-based approach. Plant visits and team-based exercises reinforce classroom learning. The courses are conducted both at the University of British Columbia and at external locations in collaboration with partner colleges, universities and the private sector. The program is taught using a core curriculum but sessions include extensive discussion of regional issues based upon climate, product and species variations. Each module is offered at least once per year. Participants may complete the modules at their own pace in order to fit in with professional responsibilities.

The Kiln Drying Certificate Program is administered by the Centre for Advanced Wood Processing (CAWP), Faculty of Forestry, University of British Columbia.

For more information go to
Job Postings / Continuous Drying Kiln Operator/Forklift Operator - Millport, AL
« Last post by admin on December 14, 2016, 02:49:28 PM »
Continuous Drying Kiln Operator/Forklift Operator - 01010778

The Millport, AL lumber manufacturing facility is looking for skilled Continuous Drying Kiln Operator/Forklift Operator with a thorough and comprehensive knowledge of large forklift operation and the ability to ensure quality lumber drying.  We are seeking individuals who are committed to safety, motivated to work, and works as a team member. The hourly rate of pay for this position is $18.36.
Millport is a quaint town located approximately 50 miles northwest of Tuscaloosa, AL. The Millport area is perfect for anyone who enjoys living in a personal, tight-knit community - with the advantages of close proximity to outdoor recreational activities, shopping, dining and collegiate activities.
Company paid relocation is not available for this position.   

Key Functions:
  • Operate large forklift to move pack of green lumber from the sawmill, correctly stack the lumber on kiln carts for drying, breakdown carts of dried lumber and place packs of dried lumber onto the track system to feed the lumber to the planermill.
  • Operate and maintain CDK kilns (troubleshooting, ID parts, instrument calibration, maintenance, and PMs) to ensure quality dried lumber, including cleaning of the kilns and maintaining housekeeping standards in the area.
  • Manage lumber rotation (green and dry) and follow QC guidelines (track/file control charts, audits, etc.) for drying lumber.

  • High school diploma or equivalent.
  • Minimum of 3 years of experience operating a large forklift.
  • Able to work safely and follow all company policies and procedures.
  • Must have demonstrated leadership and team skills.
  • Strong written and verbal communication skills.
  • Must have good computer skills. (Strong Excel skills)
  • Self-motivated and able to work with minimal supervision.
  • Good decision making skills.
  • Able to conduct visual equipment inspections, perform basic preventive maintenance and assist maintenance in troubleshooting/improving equipment.
  • Must be able to do basic math, read dials, and insert data into spreadsheet.
  • Good hand/eye coordination.
  • Must be willing to work a 12-hour, rotating/variable shift.
  • Must be able and willing to work with little or no notice on any shift, including weekends, overtime, and holidays.
  • Able to work in extreme temperatures, in dusty and noisy conditions, while wearing safety equipment.
  • Must be able to meet the essential job function of this position, including but not limited to: lift 2-20 pounds regularly, lift up to 50 pounds occasionally, climb steps and ladders, work from height, and work in tight spaces.
  • Successful completion of assessment process, background check and post-offer pre-employment drug screen and physical
  • Resume detailing your education and work history required.

The following qualifications are preferred:
  • Previous experience drying lumber

For more information to to apply click here and enter 01010778

NOTE: Job postings on are provided as a free service. We do our best to keep all postings current. However, if you discover a job listed on our forum is no longer available, please send us a message to that effect and we will remove from the board. Thank you.
Dry Kiln Maintenance / Protecting Boilers
« Last post by TILLAMOOK on December 14, 2016, 09:32:30 AM »
Looking for input regarding protecting boilers from low steam/bad cleanouts while protecting the wood in the kilns as well
General Discussion / Re: Brown Stain in Ponderosa Pine
« Last post by robshow on December 12, 2016, 08:10:26 AM »
Thank you LarryL.
This is the first time in my 6 year career that i have had to deal with the brown stain issue.
These are decked logs and only about 6-8 months old (at our site) we do a good job watering with sprinklers.
I will look into the WB locations and check air flow and calibration.

The charges of 6/4 that we are running now at the planer still dont show any improvement from last schedule adjustment.
General Discussion / Re: Brown Stain in Ponderosa Pine
« Last post by LarryL on December 09, 2016, 11:43:40 AM »
Has this problem always existed, or is a new experience? One thing to consider, are you sawing fresh logs or decked logs? If decked how old are these logs, and have they been stored under water(sprinklers etc). While in California years ago I dried millions of feet of Ponderosa and Sugar Pine. Fresh logs are pretty forgiving, most conventional schedules can be used. Old decked or sour deck logs posed the biggest challenge. Low initial temperatures and low humidity were required, Conditioning could create issues. Lumber that was dried to 12% or less wasn't a problem. Boards that were above FSP showed brown stain issues. The main to consider early in the schedule is not to pull the moisture so fast that it pools on the surface. If your airflow is not sufficient to remove the water from the surface it is a tough battle. We had different schedules for fresh logs versus decked logs. We also had summer and winter schedules. Use a hygrometer to confirm that your recording temps and sensors are correct. Especially your wet bulb readings. Your humidity may be higher than you think. You might have to remount your wet bulbs to insure there is proper airflow over them to give you accurate readings. Too high humidity at the wrong time of the schedule is a recipe for brown stain.
General Discussion / Re: Brown Stain in Ponderosa Pine
« Last post by robshow on December 07, 2016, 08:32:27 AM »
Thanks for the info HencoV !!!
Thanks for putting so much thought and effort into your reply, im still trying to digest it.

We try not to use the steam spray for heating up although we have a 4/4 schedule that uses it. We tend to have an issue with kiln stain if we do too much live steam (we already use quite a bit  conditioning on the tail end).
I like what you said about the venting and pressure drop. This definitely cant help with descent air flow through the units.
We are going to begin an air velocity test in our kilns and i will check the WB locations and try that which you suggested.

I didnt quite understand the schedule that you created. Some of the terms and the format of it. As you see my schedule format is a little bit different.
At this point with some of the changes we have made our 5/4 shop is looking a lot better. I wont know about the 6/4 until they run that next week.   

Again, Thank you for the help. Im going to share this with others (electricians, maint supervisor) at my mill and see what kind of changes we can make.
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