A submersible pump, a pump for sumps or a bucket pump is a transportable or stationary (centrifugal) water pump that is submerged in the liquids to be pumped. It is usually powered by electricity; all live parts are isolated from the environment. But there are also versions that work by means of hydraulics, because then the pump unit is lighter because the engine is eliminated, but a corresponding hydraulic pump is necessary in this case. The liter output is between one hundred liters per minute upwards to 2,200 liters per minute. Submersible pumps can be equipped with a float switch. This serves for dry-running protection of for level control. Today we talk about different uses of submersible pumps.
Submersible pumps in civil protection
The tasks of civil protection, in particular of the Technical Relief Organization, demand in the elimination of damage situations with water involvement in smaller and medium-sized operations submersible pumps with high flow and suction capacity. According to STAN this equipment is provided to the emergency services with submersible pumps with performance characteristics of 400 liters per minute and 800 liters per minute. These are assigned to each salvage group according to STAN and stowed in the vehicles. In addition, the specialist group for water damage will be equipped with additional submersible pumps of up to 2,200 liters per minute. The requirements of the THW refer here to a high-power throughput and the possibility of dry intake, continuous operation and the lowest possible residual water level.
Submersible pumps in the water supply
In the water supply submersible pumps are used in smaller wells and cisterns. A special submersible pump is the submersible motor pump, which in the multi-stage design can handle even larger volumes of water and delivery heights and, due to its design, can also be installed in narrow well pipes.