Adjustment method of expansion and contraction amount of spheroidal graphite electric ball valve. Adjustment method of the expansion amount of the spherical graphite electric ball valve: the spherical graphite electric ball valve is composed of a loose sleeve expansion joint and a flange stop short pipe. The ductile electric ball valve can prevent the leakage and damage of the compensation joint caused by excessive displacement of the pipeline. It is mainly used for loose sleeve connection of the pipeline to absorb the axial displacement and bear the axial pressure thrust within the allowable displacement range. It is mainly used for the treatment of water and sewage. During installation, the expansion joint needs to loosen the gland nut. After the installation length is adjusted, the two short pipes are welded with the pipe. Finally, the nuts are tightened evenly with the diagonal method. After the anti pull off nuts are adjusted, the expansion joint can be put into use.
During installation, adjust the connection length between the two ends of the product and the flange, tighten the gland bolts diagonally and evenly, and then adjust the limit nuts, so that the pipeline can expand and contract freely within the expansion amount, lock the expansion amount, and ensure the safe operation of the pipeline. It is used to weld both sides with the pipe. When the temperature changes, the pipe can expand and contract freely in the middle of the joint. When the foundation sinks, the pipe can deflect, and ensure that the seal has no leakage, so as to achieve the purpose of automatic compensation.