Gravel Mining Arnold, Flüelen
		The project: The out-dated floating grab dredge plant for gravel digging on the Urner Lake is to be modernised. Executing company: Arnold&Co. AG The problem: Replacement of the old centrifugal pumps in dry position by submersible pumps.
Our solution: Application of four high-head pumps each of Type LH837 and LH430. The advantages of the installation of submersible pumps are the much lower noise level and the lower energy consumption, amortising this investment very quickly.
		From top: Fig. 1: Fron view of the two screening plants Fig. 2: View of the grab dredge plant with parts of the transport system Fig. 3: LH430 prior to installation in shaft
Fig. 4, on right: LH837 prior to installation in shaft
In the event of abrasive and corrosive utilization, stronger wear and tear will take place naturally in certain components. With regards to the above application wear and tear can take place mainly in impeller, suction plate, shaft sleeve, oil ring, mechanical seal, pump casing, strainer, motor casing and discharge coupling. Depending on the working conditions the lifetime of those parts might vary significantly and can be shorter than the legal warranty period. In this regard, please pay attention to our general conditions of sales (www.tsurumi-europe.com/english/GCS.htm) that we also send to you by mail on request.