??Seal packing is installed in easily lead to the following questions, the main reason is the operator of the packing seal sufficient understanding of the importance, for fast, trouble, caused by violation of rules.

??1, cleaning is not thorough, careless operation, the abuse of tools, that is, stem, cap, you do not fill the oil to clean, and even there is debris letter; operation not in accordance with the order, fill holes with no special tools, not with chisel cut filler, filler, such as the installation with screwdriver.

??2, filler selected properly, on behalf of the high-low, on behalf of a narrow width; will fill with the general low-voltage high-temperature and strong corrosion in the media.

??3, angle does not fill up, of different lengths; installed in the filler is not the formation of the letter, not tight.

??4, multi-filled release, multi-layer wound filler, a pressed, so that non-uniform filler filler letter, there are gaps, pressed tightly within the outer loose, an increase of leakage of filling materials.

??5, the installation of too much filler, so that packing gland packing in the above letter, resulting in displacement, abrasions stem.

??6, packing gland and packing of the pre-clearance letter is too small, in the case of leakage of filling materials in use, will no longer be able to tighten the packing gland.

??7, packing gland too tight on the fill weight, an increase of stem wear and tear, so that increasing the valve opening and closing force.

??8, packing gland skew, uneven elastic.

??9, stem and packing gland is too small space, mutual friction, wear and tear stem.

??10, O-ring installed distorting, scratches, deformation defects such as Latin America.