1, the valve should pay attention to the storage environment, should be stored in dry and ventilated room, and blocked both ends of the path.
2, the valve should be checked regularly and remove dirt on it, apply anti-rust oil coating on its surface.
3. Install the valve after application, should carry out regular maintenance to ensure proper operation.
4, you should check the valve sealing surface wear, and according to the situation for repair or replacement.
5, check the stem and stem nut trapezoidal thread wear, packing Obsolescence failure, etc., and replace as necessary.
6, to deal with the valve sealing performance tested to ensure their performance.
7, the operation of the valve should be intact, and the bracket flange bolts complete thread lossless, no loosening.
8. The hand wheel is lost, should be filled and not be able to replace with a wrench.
9, the gland does not allow skew or no pretension clearance.
10, if the valve is more harsh environment, vulnerable to rain, snow, dust, sand and dirt contamination, you should install a protective cover for the valve stem.
11, the scale on the valve should remain complete, accurate, clear, valve seals, caps.
12, insulation jacket should be no dents, cracks.
13, the operation of the valve, to avoid its beat, or support heavy loads.