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Daily maintenance of common valves


Release time:

2017-12-27

"Valve leakage" is quite common valve problems, in fact, this problem is the day-to-day maintenance does not pay attention to, we only with a scientific attitude to the valve for daily maintenance, in order to make the valve in the work to achieve the desired effect and application of the purpose, from the source to eliminate valve leakage, reduce the accident caused by valve leakage. Therefore, we should do the following.

"Valve leakage" is quite common valve problems, in fact, this problem is the day-to-day maintenance does not pay attention to, we only with a scientific attitude to the valve for daily maintenance, in order to make the valve in the work to achieve the desired effect and application of the purpose, from the source to eliminate valve leakage, reduce the accident caused by valve leakage. Therefore, we should do the following.

1, long-term storage of the valve, should be made regular inspection, the exposed processing surface must be kept clean, clean up dirt, storage ball valve should be blocked at both ends and in the open state, gate valve, stop valve, check valve, both ends of the channel should be blocked and in the closed state, neatly stored in the indoor ventilated dry place, it is strictly prohibited to stack or open storage.

2. Before installation, the pressure of the valve mark must be carefully checked, whether the diameter meets the use requirements, the shortcomings caused by the transportation process must be cleaned, and the dirt of the valve parts must be cleaned.

3. When installing, the valve can be directly installed on the pipeline according to the connection method. Under normal circumstances, it can be installed in any position of the pipeline, but it is necessary to facilitate the operation of the maintenance. Pay attention to the flow direction of the cut-off valve medium, which should flow upward under the longitudinal disc. The lifting check valve can only be installed horizontally.

4. When ball valves, globe valves and gate valves are used, they are only fully open or fully closed. They are not allowed to adjust the flow, so as to avoid erosion of the sealing surface and accelerate wear. Inverted seals in gate valves and upper threaded globe valves

Device, the handwheel is screwed to the upper position and tightened to prevent the medium from leaking from the packing.

5, ball valve, globe valve, gate valve open, close the application of hand wheel, do not use the lever or other tools, so as not to damage the valve. Turn the handwheel clockwise to close, otherwise it is open.

6, packing gland bolts should be evenly tightened, should not be pressed into a crooked state, so as not to damage the stem movement or cause leakage. 7. The valve should be kept clean during use. The transmission thread must be lubricated regularly. When a fault is found, it should be stopped immediately to find out the cause and clean up the fault.