1. The ball valve needs to be replaced. If the ball valve is flanged or screwed, directly disassemble the flange or loosen the screw, and replace the broken ball valve.
2. If the ball valve is directly welded on the pipeline, it is necessary to stop the operation of the pipeline and cut it. This time, it needs to be replaced with a flanged ball valve or a threaded ball valve. The flanged ball valve requires two "steel". "Plastic conversion joint", hot-melt welding with the original pipeline, and then install the flanged ball valve; the threaded type requires two monofilament heads, one end is welded/bonded with the pipeline, and the other end with wire is connected to the The joint of the ball valve is screwed.
3. The above problem belongs to the wire connection type, the name is: double-live ball valve, directly loosen the lock nut and replace the valve.
4. When purchasing the valve, the merchant sells a whole valve. When replacing, remove the lock nut of the union at both ends, and directly connect the valve to the original lock nut on the pipeline.