Unloading tankers with liquids is often done by applying air pressure or nitrogen pressure above the liquid in the tanker, so that the liquid is pushed out. In a number of situations this method is not possible because the liquids are, for example, too viscous or it is not desired due to risks that this entails. For these situations, unloading pumps are used that are either mounted on the tankers themselves or are set up stationary at the unloading location. Depending on the type of liquid, in addition to the discharge hose to be connected, a vapor return line is also connected to equalize the pressure in the tank and prevent unwanted vapors from entering the atmosphere. Usually people want to have a tanker unloaded within an hour and the tanker must be pumped empty as far as possible. For the pumps to be used, this means that they generally must have a capacity of at least 25 to 30 m3 / h and that air suction and running dry must be taken into account when the tanker is almost or completely empty.
Bedu Pompen has a great deal of experience in loading and unloading tankers for liquid transport and liquid gases and has an extensive range of loading and unloading pumps. Positive displacement pumps are usually used for viscous liquids, including gear pumps, hollow disc pumps or pneumatically driven diaphragm pumps. For liquid gases, solvents, fuels, various hydrocarbons and low-viscous liquids, self-priming (magnet-driven) side channel impeller pumps are used and for acids and alkalis, the magnet-driven centrifugal pumps with PFA lining are often used.
Liquids for which we regularly supply pumps include sulfuric acid, caustic soda, formic acid, propionic acid, phosphoric acid, hydrochloric acid, iron chloride, ethanol, methanol, diesel oil, petrol, kerosene, toluene, xylene, isocyanate (MDI and TDI etc.