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Valve maintenance procedures
Valve maintenance of the general procedure: 1, the valve is removed, the steel word on the valve and the flange connected to the valve, lay the maintenance number, and record the valve working medium, working pressure and working temperature for the repair of the election Corresponding material. 2, overhauling the valve, the requirements in a clean environment. First clean the outer surface of the valve or blow with compressed air or with kerosene. But remember to nameplate and other logo. Check the appearance of damage and make a note. Then remove the valve of the other parts, with kerosene cleaning (do not use gasoline to clean, so as not to cause a fire), check the other parts damage, and make a record. 3, the valve cover for strength test. If the Department of high-pressure valves, but also for non-destructive testing, such as ultrasonic testing, x-ray detection. 4, available on the ring Hongdan powder test, valve seat, gate (valve do) the degree of agreement. Check the valve stem is bent, whether corrosion, thread wear how. Check the degree of stem nut wear. 5, to check the problem to be addressed. Body repair welding defects. Surfacing or renewal of seals. Align or replace the valve stem. Repair all other parts should be repaired; can not be repaired replacement. 6, reassemble the valve. When assembled, gasket, packing to be replaced. This article Keywords: valve