What are the requirements of mechanical seals for the sealing fluid used for flushing?

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For self-flushing, the flushing fluid is, of course, the pumping medium itself. For cyclic flushing and injection flushing, the sealing fluid and the medium to be sealed are different, and certain requirements are placed on the sealing fluid. 1) The flushing fluid should be clean, non-corrosive, compatible with the medium inside the pump, and possess good lubricity at operating temperatures. 2) The flushing fluid entering the pump does not affect product quality; if it leaks out, it does not pollute the environment nor cause any other adverse effects. 3) The entry of flushing fluid into the pump does not affect its operation. For example, it does not cause pump evacuation and cavitation. 4) The flushing fluid has good thermal conductivity, enabling heat to be dissipated promptly. The flushing temperature must meet the operational requirements. 5) The price of the flushing solution should be low. The amount of water used for flushing must be controlled and not excessive, as this is necessary for saving energy and reducing consumption. The specific fluid to be used as the flushing liquid should be chosen flexibly based on the particular conditions.