To drain flange, the flange bolts and tighten up. If that doesn't work, it is necessary to open and see whether there is any damage to the flange gasket and the leakage problem, is not easy being determined, first, may did not die, and then forced to close, the second, damage to the sealing seat, the to re grinding, for damage to the spool to see erosion damage is medium impact damage, but both re welding sealing surface. Internal leakage is generally the valve seat or valve core sealing surface damage, this can be grinding seat or valve core sealing cover, but there is an ad hoc situation if it is electric or pneumatic, there may be a stroke of the valve is not set. Leak to look at what the local leakage, if the valve body can only change the leakage of the valve.
Fortunately, the leakage, the leakage of flange bolt, the flange and tighten up, if not, will be open to see in the flange gasket is damaged, the padding leakage, if the packing gland matter, loose, will add filler, if the body is directly on the leak, low pressure it can be a high pressure welding, if it is directly abandoned, safety first, the leakage problem, the situation is not good, first, may not shut, then forced off, second, valve seat seal is damaged, this will be re grinding, for valve damage, to see the erosion damage or is the medium impact damage, but both re welding and sealing surface.
Internal leakage is generally the valve seat or valve core sealing surface damage, this can be grinding seat or valve core sealing cover, but there is an ad hoc situation if it is electric or pneumatic, there may be a stroke of the valve is not set. Leak to look at what the local leakage, if the valve body can only change the leakage of the valve.
Inner leakage should be a problem with the sealing surface, the sealing surface to look at the effect of processing.
External leakage, then the valve is different, the leak location is different, it should be treated differently.
Fill in the leakage of the case, then tighten or replace the packing, we often can not stop the use of pressure plugging.
Valve has a lot of leak, leakage in most cases is leakage from the gland, the gland open supplement or replace the packing and the gland should not be missed on the tight. Internal leakage is above the valve core of the inside sealing surface is broken, but practical experience tells us that sometimes there may be leak inside a hard object stuck in the top of the valve core, resulting in leakage, the specific approach is to re open the valve close, back and forth several times to wash away a hard object can be. If it is the problem of their own, it is time to choose the right time to replace the valve.
