How to flush a magnetic flap level gauge

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Before checking the flush level gauge, it is necessary to verify that the sludge oil system is unobstructed, in order to prevent overpressure in the low-pressure pipelines and the sludge oil tank. The liquid level in the oil tank, to prevent overflow. Close the inlet valves at the upper and lower roots. Open the drain valve? Slightly open the overhead vent valve. Pump the oil into the oil sludge tank. Close the drain valve and the upper outlet valve. Slowly open the lower outlet valve to prevent damage to the float, which could cause it to deform or break, and close it after the oil is introduced. Open the drain valve again to send it to the sludge tank. Repeat several times, usually 2 to 3 times, until it is thoroughly rinsed clean. If the flip plates of a magnetic flap level gauge get disordered, they can be brought back into place using a magnet brush.