Hydraulic System Flushing Procedure
Manufacturing tolerances on today’s high pressure hydraulic systems demand strict control of system contamination. Contamination that enters the system in the manufacturing and assembly process must be removed prior to start-up to ensure proper and predictable performance over the life of the system.
Both new and rebuilt systems must be flushed prior to start-up. The concept of flushing is to release and remove contaminants from the system by forcing a fluid at high velocity through the system. In theory, this should leave the internal walls of the conductors at the same level of cleanliness as the oil to be introduced. Then, during operation, the system will experience only internally generated, or externally extracted contamination that can be controlled through conventional filtration.
Manufacturing tolerances in today’s high-pressure hydraulic systems require strict control of contamination in the system. Contamination that enters the system in the manufacturing and assembly process must be removed prior to commissioning to ensure adequate and predictable performance over the life of the system.
A disadvantage of flushing processes is that they are based on procedures to clean the fluid, but ignore the internal cleanliness of the system. Even when pipes and conductors are installed with the utmost visual care, the human eye can only see particles larger than 40 microns – far below that required by even the most basic hydraulic system technology.
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