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1. Valves welded on the bolts should not be too long, otherwise it will bolt too long because the valve body flow channel, resulting in the sealing surface is "overhead", can not play the role of sealing; assembly should pay attention to check the screw opening, To ensure that the sealing surface can be closely engaged. 2. Select the appropriate adjustment pad, liner thickness should be slightly lower than or equal to the disc seal surface height, so that the soft seal and valve disc sealing surface in close fit, in the same plane. 3. To prevent the compression nut off, tighten the nut should be made for the appropriate anti-loose treatment. 4. Should consider the fluid medium conditions of use, select the appropriate media requirements of the soft gaskets, so as to avoid media corrosion or high temperature deformation and other effects. 5. When the valve seat sealing surface more serious damage, the seat can be scrapped, the valve core can still be improved with the use of the same size valve seat. 6. Regulate the valve should be well marked to avoid Meng fierce clearance, so as not to affect the seal life
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