POWDER TANKER DELIVERY INSTRUCTIONS GUIDE

1. Obtain Permission and Identify Unloading Point

•   Secure permission to enter the site.
•   Confirm the location of the unloading point.

2. Prepare for Unloading

•  Manoeuvre the vehicle into position,
•  Put on your PPE (Personal Protective Equipment).
•  Present the delivery tickets.

3. Confirm Readiness to Discharge
Request permission to discharge into the silo.
Verify that the pipe valves are open and the filters are operational.

4. Connect Equipment

•   Connect the pipes, ensuring they are as straight as possible.
•   Adjust the truck’s position if necessary.

5. Pressurise the Tank

•   Connect the blower to the tank and start the blower.
•   Open the aeration valves and close the air boost valves to pressurise the tank.
•   Check all lids for potential leaks.

6. Perform Initial System Check

• Briefly open the rear pinch valve for approximately 5 seconds, then close it.
• Ensure the silo is open and the clamps are secure.
• If an issue arises, turn off the blower and resolve it before proceeding.

7. Begin Pressurisation and Discharge

•   Once confirmed, build pressure to 1 bar.
•   Open the rear pinch valve and a quarter of the boost air valve.
•   Expect the pressure to rise to approximately 1.5 bar.
•   After about 5 minutes, open the second pinch valve to balance the discharge and minimise abrupt pressure changes.

8. Monitor the Unloading Process

•   Remain at the tank controls at all times during unloading.
•   Monitor for potential issues, such as the discharge pipe moving or leaks developing.
•   Check the powder level in the tank using the weight gauge and by tapping the tank with a rubber mallet.

9. Adjust Pressure as Needed

•   If the pressure rises to 2 bar, open the boost valve further to divert more air into the silo and reduce tank pressure.
•   Be prepared for the first pot emptying, as it will release significant air pressure into the silo, potentially causing dust or damage.
•   Immediately close the pinch valve if the tank pressure drops suddenly.

10. Transition Between Pots

•   After the first pot empties, close its aeration valve to concentrate airflow into the remaining pot.
•   Stay vigilant as the second or final pot empties, as air will rush through the pipe.

11. Finalize Discharge

•   Once the tank is empty of powder, close the pinch valves.
•   Open the boost valves to ensure proper airflow.
•   Shut the aeration valves and turn off the blower and truck.

12. Release Remaining Air and Disconnect Pipes

•   Open the release valve to release residual air.
•   Confirm there is no air or powder flow from the tank or trapped in the discharge pipe (press on it with your foot to check).
•   Carefully unclip the pipe at the tank end. If air or powder flows back from the silo, drop the pipe immediately.

13. Secure Equipment and Report Issues

• Replace the end cap on the tank promptly.
• Unclip and store the pipe in the pipe carrier.
• Safely remove the jump pipe (be cautious as it may be hot).
• Collect all paperwork and report any problems or dust emissions to the batcher.

The principle

Blowing air into a tank filled with cement or powder creates pressure. The air and powder will seek to move to an area of lower pressure. In this case, the pipe to the silo.

Opening the value directs  the powder through a pipe into the solo. The blower continues to replenish the pressuriser air and powder until all the powder has been transferred.

The pressure in the tank is regulated by diverting air to bypass the tank using boost valves, as air will always follow the path of least resistance.

Unloading a Powder Tank

•   Connect the pipes to the silo pipe.
•   Close the air release valve.
•   Close the aeration valve and top air valve.
•   Open the boost valves.
•   Start the blower.
•   Check the airline pressure gauge and pipe clips.
•   If there is any pressure in the pipe, the silo may have a fault (i.e., the valve to the silo is not     open, or the pipe is blocked).
•   Open the aeration valves and top air valve.
•   Close the boost valves.
•   Build the pressure in the tank to 1.2 bar approx.
•   Partially open the boost valve (“crack open” the valve).
•   Open the first pinch valve.
•   Open the second pinch valve.
•   Close the pinch valves once the tank is empty.
•   Close the aeration valves.
•   Fully open the boost valves.
    Turn off the blower.
•   Open the air release valve.
•   Remove the discharge pipe from the tank.
•   Replace the end cap.