Number, the cause of the problem processing method 1 valve leakage. , and Industrial Valves seat sealing surface is hard ( Such as silica gel, scrap metal, slag and other hard objects) Bruised, forming dent in 2. The center line of the valve stem and valve seat sealing surface ( face) 3 no vertical. Top of valve and valve surface wear due to long-term use of 4. Stem 1 at both ends of the outside screw sets. Adopt the method of grinding or turning after grinding to repair or replace the 2. Repackaging or replace 3. Adopt the method of grinding or turning after grinding to repair or replace the 4. Extract stem to tin, tighten, and had better use silver welding welding valve packing run cold freeze 1 2. Filler filled not divide evenly, not tight, or when the valve stem is not straight, not round, cryogenic liquid or gas gap leakage will arrange packing. Due to the cold quantity gaiden, water will freeze in the air on the packing, will be frozen stem 1. Using steam or hot water heating packing to switch valve 2. After repair valve. Packing should be packed well, impaction, the compression nut and tighten 3 flange leak 1. Sealing surface is bright and clean, level 2. Bolt tightening up not even 3. Bolt material 1. Adopt the method of grinding or turning after grinding to repair or replacement, replacement of sealing washer. 2. Bolt tightening up evenly. 3. Change the bolt flange leak 4 1. Sealing surface is bright and clean, level 2. Bolt tightening up not even 3. Bolt material 1. Adopt the method of grinding or turning after grinding to repair or replacement, replacement of sealing washer. 2. Bolt tightening up evenly. 3. Change the bolt
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