current maintenance 

1, the valve storage environment should be noted, should be stored in a dry and ventilated room, and block both ends of the path.

2. The valve shall be inspected regularly, and the dirt shall be removed and coated with antirust oil on its surface.

3. The valve after installation and application should be repaired regularly to ensure its normal operation.

4. Check for wear and tear on the sealing surface of the valve and repair or replace it as appropriate.

Check the wear of the stem and stem nuts on the trapezoidal threads, whether the packing is obsolete, etc., and make the necessary replacements.

6. The sealing performance of the valve should be tested to ensure its performance.

7, the valve in operation should be in good condition, the bolts on the flange and support are complete, the thread is not damaged, and there is no loosening phenomenon.

8. If the hand wheel is lost, the hand wheel shall be aligned in time, and the replacement of the hand wheel shall not be possible.

9, the packing cover is not allowed to skew or have no pretightening clearance.

10. If the use environment of the valve is severe, it is easy to be contaminated with dirt, dust, sand and other dirt, and the protective cover shall be installed for the valve rod.

11. the ruler on the valve should be complete, accurate, clear, lead seal and cap of the valve.

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