1, the sealing performance of the valve should be tested to ensure its performance.
2, should check whether the valve sealing surface wear, and according to the situation for repair or replacement.
3, Valve storage environment needs attention, should be stored in a dry and ventilated room, and clogging the two ends of the path.
4, installed and in use of the valve, it should be regularly overhauled to ensure that it is working properly.
5, the operation of the valve should be intact, flange and bracket on the complete bolts, thread non-destructive, no loosening phenomenon.
6, check the stem and stem nut trapezoidal thread wear, whether the filler is outdated failure, and so on, and carry out the necessary replacement. 7, if the valve use environment is relatively bad, vulnerable to rain and snow, dust, wind and sand and other dirt contamination, you should install a protective cover for the stem.
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