How To Treat Untreated Wood For Outdoor Use 👉 Pressure Treated Poles Top Video

Summary

In this video, timber is treated with a preservative through a vacuum-pressure process. The timber is placed in a cylinder, vacuumed to open its cells, and then flooded with preservative. A pressure cycle ensures deep penetration. The amount of preservative is calculated based on the timber's volume and use. After treatment, a final vacuum removes excess chemicals. The process takes approximately 1 hour and 40 minutes.

Takeaways

• 🌲 The process begins with timber being placed onto a trolley and pushed into a cylinder, which is then sealed.
• 🔧 A vacuum pump is used to create an initial vacuum to open the timber's cells and remove air from both the cylinder and the timber cells.
• 💧 The vacuum is maintained to facilitate the infusion of the timber with a preservative.
• 🚫 The cylinder is flooded with preservative from a working tank until full, ensuring no air or vapor is trapped.
• 🔄 A pressure cycle is introduced to ensure proper penetration of the preservative into the timber.
• 📏 The amount of preservative needed is calculated based on the timber's volume in the cylinder and its intended use.
• 📈 The pressure is gradually increased to a specific level and maintained to pump the required amount of preservative into the timber.
• 📉 Once the pressure is released, the cylinder is emptied by pumping the preservative back into the working tank.
• 🔎 A final vacuum is drawn to remove any excess chemicals from within the timber to reduce leaching.
• ⏱️ The total cycle time for this process is approximately 1 hour and 40 minutes.

Q & A

What is the initial step in the timber treatment process described in the script?

The initial step involves placing the timber onto a trolley and pushing it into a cylinder, followed by sealing the door.

Why is a vacuum pump used in the timber treatment process?

A vacuum pump is used to draw an initial vacuum to open the timber's cells and to remove air from both the cylinder and the timber cells.

How does maintaining a vacuum help in the treatment process?

Maintaining a vacuum makes it easier for the timber to be suffused with a preservative by ensuring that no air or vapor is trapped within the vessel.

What is the purpose of flooding the cylinder with preservative?

Flooding the cylinder with preservative ensures that there is no air or vapor compressed and trapped at the top of the vessel, facilitating proper penetration of the preservative into the timber.

What is the role of the pressure cycle in the treatment process?

The pressure cycle is introduced to ensure proper penetration of the preservative into the timber.

How is the amount of preservative to be added to the timber determined?

The amount of preservative is calculated based on the volume of the timber in the cylinder and its intended use.

What is the purpose of gradually raising and maintaining pressure to a specific level?

Gradually raising and maintaining pressure to a specific level ensures that the required amount of preservative is pumped into the timber from the measuring tank.

How is the preservative level in the measuring tank monitored during the process?

The preservative level in the measuring tank is monitored using a float level for readings.

What is the final vacuum drawn for after the pressure is released?

The final vacuum is drawn to get rid of any excess chemicals inside the timber, reducing the risk of tripping and leaching of the excess chemical.

How is it verified that the calculated volume of preservative has been retained by the timber?

Once the level indicator on the measuring tank has stabilized, a final reading is taken to verify that the calculated volume of preservative has been retained by the timber.

What is the total cycle time for the timber treatment process as described?

The total cycle time for the timber treatment process is about 1 hour and 40 minutes.