How to deal with the problem of leakage or leakage in the shutoff valve

Leakage of the shut-off valve is a good deal. For the leak in the flange, tighten the bolts in the flange. If it is still not enough, we must open and see if there is any damage in the flange gasket. Capping, if the filler is too loose, it must be filled, if it is directly on the body to leak, low pressure, then you can weld it, if it is high pressure, give it directly, safety first, for the endoleak problem, the situation is not good Determined, first, may not be dead, and then shut it hard. Second, the valve seat seal is damaged. This will require re-grinding. If the valve core is damaged, it depends on whether the flushing is damaged or it is damaged by the medium, but both Have to re-weld the sealing surface.

The inner leakage is generally a damage of the valve seat or the sealing surface of the valve core. This can grind the valve seat or the sealing surface of the valve core, but there is also an special case where the valve stroke may not be set properly if it is electric or pneumatic. Leakage to see where leakage, if the valve body leakage can only change the valve.

Inside leakage should be a problem with the sealing surface, the sealing surface treatment to see what effect.

If the leak is missing, the valve is different and the leak location is different.

If there is leakage at the packing, tighten or replace the packing. We often use pressure plugging when we cannot stop.

There are many leakage points in the globe valve. In most cases, the leakage is from the gland. If the gland is opened to replace or replace the filler, the gland should be tight and it should not leak. The inner leakage is that the sealing surface on the upper surface of the valve plug is broken, but actual experience tells us that sometimes the inner leakage may have a hard object stuck on the valve core and cause inner leakage. The specific method is to open the valve and then close the valve. , A few times to flush hard things back and forth on it. If it is the valve itself, it is necessary to select the appropriate time to replace the valve.