Welded ball valve adopts special structure design and weld quality. There are clear standards for weld quality. Welded ball valve is connected to main pipeline by welding. When ordering the valve, the manufacturer should be required to add 1.0m long sleeve pipes at both ends of the valve. Once the weld is unqualified, there is enough length to cut off the unqualified weld and re-weld. When the ball valve is welded to the pipeline, the valve should be at 100% fully open Position, so as not to damage the valve ball by splashing welding slag, while ensuring that the temperature of the internal seal of the valve does not exceed 140 degrees Celsius, if necessary, appropriate cooling measures can be taken.

The welded ball valve adopts a special structural design, which has the characteristics of maintenance-free. Before the burial, the outer side of the valve is coated with a special anti-corrosion coating of Pu. At the same time, three injection pipes for the valve seat and the stem are filled with emergency grease, and the middle cavity is empty The tube and valve stem are extended appropriately according to the depth of the ground, so that the staff can complete various operations on the ground. After the direct burial is realized, a small valve hand well can be built. For conventional non-welded ball valves, they cannot be buried directly, and large valve wells need to be built. As a result, a dangerous closed space is formed, which is not conducive to safe operation. At the same time, the valve body itself and the bolt connection parts of the valve body and the pipeline will be corroded, which will affect the service life of the valve.