The TABCO tank coupling has been specially developed for fuelling systems that use pressure filling.
When pressure filling, the hose is attached to the tank using a no-leak or ‘dry’ coupling. This replaces the refuelling nozzle that is normally used (like the ones for filling up a car). This no-leak coupling ensures that the fuelling system is sealed, and is comparable to refuelling with LPG. The TABCO coupling was primarily intended for diesel, petrol and kerosene, but it can also be used for other kinds of liquids such as chemicals or domestic fuel oil.

What makes the TABCO coupling unique is the integrated overfill protection.
This overfill protection ensures that the tank coupling closes once the tank is full, preventing overfilling.
Overfilling can cause environmental damage and, in the worst case scenario, the tank to rupture. A tank ruptures because the vent cannot handle the influx of liquid, which creates overpressure in the tank. When a tank is overfilled, the liquid tries to escape through the vent, but the vent often contains a tilt valve. In fact, in some European countries it is compulsory to have one! The tilt valve prevents environmental damage by completely closing off the vent when the tank is overfilled.
When a tilt valve is installed, a tank will suffer considerable damage if it is overfilled.

The TABCO works independently of any electronic overfill protection devices, so the TABCO will still prevent the tank from rupturing if the electronic overfill protection device is broken, by-passed, or is simply not used.


Diesel locomotives

The TABCO consists of a no-leak coupling, a manual tester, a float kit and a valve. For further information, please see the ‘How it works’ section and the TABCO models.