Top Loading Chemical Arms are the method by which most (70%) of the chemical industry, load liquids. The majority of chemicals loaded globally are via the top of the tanker.
The reasons are fairly simple. The tankers are effectively barrels on wheels. Hauliers must remain competitive and so the majority of tanker trucks are termed General Purpose. They transport different liquids on different day (subject to stringent cleaning certification). So, to make sure they meet most customers needs they remain simple methods of transport. They have a hole in the top to fill and a valve outlet at the bottom to drain. In almost all cases the tanker has no built-in high level detection or vapour return facilities. The advantage of top loading is that all the sophistication required can be fitted to the loading arm. Carbis Loadtec have a high level of expertise in Chemical Loading and have examples of Top Loading Chemical Arms solving almost all bulk liquid problems.