API Adaptor Valve is installed on one side of the bottom of the tanker, with the design of quick connecting structure. Interface dimension is designed according with the API RP1004 standards. This is an important component of the bottom loading system to get quick detachment without leakage, it is much more safe and reliable when doing the work of loading and unloading. This product is suitable for water, diesel, gasoline and kerosene and other light fuel, but it can not be used in corrosive acid or alkali medium