First, the valve is closed by means of external force, that is to say, rotate the valve shaft clockwise until the valve seat and valve plate have a "close contact". At the same time, the cylinder must also be closed. All "closed" here means that the small groove above the cylinder shaft must be vertical to the cylinder block. After the cylinder is installed on the valve, check whether the screw holes are aligned, and generally there will be no deviation. If it exists, just turn the cylinder block a little and tighten it with screws. 　　　　

In operation, as the executor, the use efficiency of the electric ball valve is determined by the quality of the internal ball valve. Therefore, before use, it should be ensured whether the quality of the internal ball valve of these equipment meets the needs of long-term operation, which is generally determined by professional inspectors. On the other hand, it is necessary to purchase a higher quality ball valve for installation. Because the use practice of these equipment is relatively long, resulting in greater material consumption, if ordinary quality parts are selected, it will increase the probability of mechanical failure.