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Dry Kiln Chamber

SK-Type Dry Kiln is a free standing chamber of modular construction which enables the chambers to be assembled in row and size can be customized by individual requirements.

It is designed to dry hard and soft wood products down to 8% final humidity. There are two versions available: a standard version with a drying temperature 200° F and second one to carry out low-temperature drying processes. The latter is known as “white beech” ( a process which keeps the natural color of beech).

The main parts of a kiln.
The kiln is made of aluminum and corrosion resistant materials. The main structure consists of posts and trusses. The walls and roof panels are filled with polyurethane foam of very high insulating valve. There is also version with glass wool available, which is cheaper than one with polyurethane foam.

The fans are set in trusses with reverse axial fans (each of motor of 3.3 kW); they are designed to work in temperatures up to 210°F and humidity of 100%. The fans are set between the roof and false ceiling.

The heating system consists of heaters made of bimetallic tubes of high thermal efficiency, supply pipes, and a control set ( pump, tee valve, filter, and a cut-off valve).
The humidifying system is made mainly of copper. It consists of sprayers, filter-supply set and a control set with an electromagnetic valve.
The false ceiling is made of profiled aluminum sheets and separates the load space from the fan sets.

The vent set consists of inlet and outlet chimneys and is placed in the front and rear walls. Control flaps regulation is through rotating servo motors operated by a controller. In the “white beech” version are extra vents with extraction fans for intensive ventilation of the chamber.

The kiln door is a sliding type, closed by latches. The moving mechanism is a manual hydraulic pump which operates the doors. One operating mechanism can be used for more than one chamber in the row. The wing-type of the kiln door is also available.
An inspection door is fitted for examining the rear section of the chamber during the drying process.

The protective system of the stack aims to protect the stack being dried from uncontrolled movement and consists of the back-up posts in the rear part of the chamber and the protective strips in the front part of chamber.

The automatic control system consists of MSSD-02 and MSSD-03 microprocessors. The drying process is carried out on the basis of 4- or 8- point measurement of wood humidity, measurement of air humidity, 2-point-measurement of temperature, and supply temperature measurement.
HT thermal treatment can be added to the function of the controllers. This treatment is necessary when drying wood packaging.
The controllers allow for drying process in following modes:

  • manual: manual operation enables setting all parameters in drying process;
  • automatic: according to a pre-set program for final wood humidity;
  • automatic: according to the customer’s own program for required wood humidity;
  • automatic: according to the customer’ own program which relies on time settings for particular a drying phase;
  • Semi-automatic: relying on setting the humidity in the chamber and changing it depending on requirements.

The automatic mode relies on choosing one out of a hundred of programs. It must be done by choosing the wood species, thickness, drying speed, final humidity and other parameters.

The parameters of the drying process are recorded in the memory of the controller and can be printed (a printer is part of the standard equipment). As an option, the controller can be connected to the Computer System of Kiln Supervision – KSD1, installed on a PC, enabling the control and work modification of multiple chambers.


Technical specification

SK- 42 SK- 55 SK- 60 SK- 78 SK-100 SK-105 SK-120 SK-125 SK-137 SK-156 SK-162 SK-200 SK-240
Outer dimensions *
Width ft Depth ft
Height ft
2215 1718 2218 2218 3018 2218 2718 3018 3418 3018 4318 4318
Inner dimensions
Width ft Depth ft
Height ft**
1610 2110 1613 2113 2113 2913 2113 2613 2913 3313 2913 4313 4313
Thermal power consumption BTU 325 428 479 600 804 838 964 1010 1100 1250 1300 1608 1915
Installed electric power   kW *** 10.5(14.1) 10.5(14.1) 10.5

14.4(18.0) 14.4(18.0) 21.0(24.6) 17.7(21.3) 17.7(21.3) 21.0(24.6) 21.0(24.6) 27.9(31.5) 27.9(31.5) 34.5(37.8)
volume of batch using 60 % loading space m3 44 58 63 82 102 110 123 126 138 157 167 205 246
* – Definite measurements after the contour of walls** – Measurement to the inner roof*** – Values given in (…) refer the drying house in the version “the beech on whitely”