Learn how to safely and effectively use our Dual-Secure Refueling solution
TABCO offers the number one solution for leak-free and safe refueling: the Dual-Secure Refueling. This innovative tank coupling is equipped with an integrated mechanical overfill protection system that automatically shuts off as soon as the tank is full. This not only prevents overfilling but also eliminates the environmental damage and pressure buildup it can cause.
In cases of overfilling, fluid can escape through the ventilation system, leading to pressure buildup or even a ruptured tank. In many European countries, it is now legally required to equip tanks with a pressure relief valve that prevents leaks by completely sealing the ventilation system during overfilling.
The TABCO Dual-Secure Refueling system is specifically designed for tanks with pressure filling, using a leak-free or “dry” coupling instead of a traditional fuel nozzle. This closed system enables safe and efficient refueling of diesel, gasoline, kerosene, and chemical liquids.
The TABCO Dual-Secure Refueling solution operates independently of any existing electronic overfill protection system, providing complete pressure control even when the electronic system fails or is not in use.
This manual will guide you on how to properly use TABCO, including filling, testing, and protecting your tanks against overpressure. It contributes to longer equipment lifespans, reduced maintenance costs, and minimized environmental impact.
Components of TABCO
TABCO consists of four standard components that work together for optimal safety and efficiency:
Leak-free coupling: Connects the fuel hose without leaks.
Hand tester: Simulates a full tank to test the system.
Shut-off valve: Prevents overpressure by automatically shutting off.
Float unit: Activates the mechanism when the tank is full.
How does TABCO work?
Step 1: Filling
The shut-off valve operates based on equal pressure across different surfaces.
Starting position: Ensure the leak-free coupling is properly connected to the tank’s filling port.
Image: Leak-free coupling connected to the tank.
Start filling: Begin the refueling process; the pump pressure pushes the plunger downward, allowing fuel to flow into the tank.
Image: Plunger in action during filling.
Continuous process: Ensure the refueling process runs smoothly and that the float unit relieves pressure below the plunger.
Image: Float unit in action.
Step 2: Tank is full
Detection by the float unit: When the tank is full, the float moves upward, closing the connection to the plunger.
Image: Float in the upward position for a full tank.
Automatic shut-off: The pump pressure builds up, automatically closing the shut-off valve and stopping the fuel flow.
Image: Shut-off valve in closed position.
Check the status: Visually confirm that the coupling is closed and that no leaks are present.
Step 3: Manual testing
Activate the hand tester: Use the hand tester to simulate a full tank by raising the float.
Image: Hand tester in action.
Observe the shut-off valve: Check that the shut-off valve closes when the hand tester is activated.
Image: Shut-off valve closed during testing.
Release the hand tester: Let go of the hand tester and confirm that the refueling process resumes.
Tips for Use
Regularly inspect the status of the float unit and the coupling to ensure optimal performance.
Use the hand tester at least once a month to verify functionality.