The impregnation process is carried out by using an autoclave, where chemicals are impregnated into timber using vacuum and pressure:
- Timber will be taken into an autoclave and primary vacuum is established. Timber cells will be purged of air and a vacuum will be maintained;
- The autoclave is filled with timber preservative;
- Pressure is used to compress protective chemicals into the timber cells;
- The autoclave is emptied and cleaned of protective chemicals;
- With the final vacuuming process, excess preservative dilution will be removed, and is pumped back to the reserve tank;
- Palivere impregnation autoclave is able to fit materials up to 20m in length, the inside diameter of the autoclave is 2,6m.
