Fuel couplings include :
- API dry disconnect couplings
- API vapour recovery couplings
- gravity drop couplings
Commonly used for loading and unloading fuel from road tankers. They are usually permanently attached to bottom loading arms at loading/unloading terminals (fuel depots). A bottom loading method is widely used in the petrochemical industry, as it is far superior to top loading in terms of economy, safety and speed. A bottom loading station is cheaper to build than a top loading station. In bottom loading, the operator works on the ground, which increases his safety. The bottom method reduces the danger of generating static electricity and forming vapours during loading/unloading. The bottom loading is much faster (the entire operation takes place at the ground level) and several chambers can be filled simultaneously. These advantages make the bottom loading method increasingly popular.