Return filtration
In order to ensure the failure-free operation of hydraulic systems underground, it is essential that the medium is not simply filtered at one point, but is continually cleaned throughout the entire circuit. Thus, return filters, that clean the fluid coming from the mining machines, are essential parts of the circuit. Return filtration is often carried out in two stages that are individually adapted to the respective application. In the first stage, an economical and effective pre-filter retains the larger part of any impurities, while in the second, our Long-Life elements ensure the provision of a fluid that meets the specified level of purity.
HFA/HFC filtration
As with other heavy duty industries where high temperatures are present close to working machines, the use of flame retardant hydraulic fluids is mandatory in the mining sector. The fluids used in mining are either luids with very high water content (type HFA made from 80% – 90% water and mineral or synthetic oil) or fluids with lower water content (type HFC made from 20% -50% water and glycol). Hydraulic fluids require a stable ratio of water and organic phase in order to function properly. Consequently, our filter media are precisely adapted to the fluid to be filtered in order to make de-mixing of lubricant and water impossible.
Tank filtration
In addition to high-pressure and backflow filtration, bypass filters at the hydraulic oil and finished hydraulic fluid tanks help to ensure that the fluids in the tanks are kept clean and in motion. Likewise, the water and hydraulic oil involved are filtered before they enter the fluid mixing plant.
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